Статті в журналах з теми "Graphene-related material"
Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: Graphene-related material.
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 статей у журналах для дослідження на тему "Graphene-related material".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте статті в журналах для різних дисциплін та оформлюйте правильно вашу бібліографію.
1
Catania, Federica, Elena Marras, Mauro Giorcelli, Pravin Jagdale, Luca Lavagna, Alberto Tagliaferro, and Mattia Bartoli. "A Review on Recent Advancements of Graphene and Graphene-Related Materials in Biological Applications." Applied Sciences 11, no. 2 (January 10, 2021): 614. http://dx.doi.org/10.3390/app11020614.
Повний текст джерелаАнотація:
Graphene is the most outstanding material among the new nanostructured carbonaceous species discovered and produced. Graphene’s astonishing properties (i.e., electronic conductivity, mechanical robustness, large surface area) have led to a deep change in the material science field. In this review, after a brief overview of the main characteristics of graphene and related materials, we present an extensive overview of the most recent achievements in biological uses of graphene and related materials.
2
Catania, Federica, Elena Marras, Mauro Giorcelli, Pravin Jagdale, Luca Lavagna, Alberto Tagliaferro, and Mattia Bartoli. "A Review on Recent Advancements of Graphene and Graphene-Related Materials in Biological Applications." Applied Sciences 11, no. 2 (January 10, 2021): 614. http://dx.doi.org/10.3390/app11020614.
Повний текст джерелаАнотація:
Graphene is the most outstanding material among the new nanostructured carbonaceous species discovered and produced. Graphene’s astonishing properties (i.e., electronic conductivity, mechanical robustness, large surface area) have led to a deep change in the material science field. In this review, after a brief overview of the main characteristics of graphene and related materials, we present an extensive overview of the most recent achievements in biological uses of graphene and related materials.
3
Sheka, Elena F. "Dirac Material Graphene." REVIEWS ON ADVANCED MATERIALS SCIENCE 53, no. 1 (January 1, 2018): 1–28. http://dx.doi.org/10.1515/rams-2018-0001.
Повний текст джерелаАнотація:
Abstract The paper presents an overview of graphene electronic structure in light of a general concept of emergent phenomena that result from the quantum phase transition caused by continuous symmetry breaking. In the current case, the spin symmetry breaking is provided by a drastic enhancement of pz odd electron correlation when the shortest distance between them, defined by C=C bond length, exceeds critical value Rcri. The UHF formalism clearly evidences the broken symmetry occurrence and perfectly suits to self-consistent description of the issue. Empirically supported and convincingly certified, the UHF emergents, such as (i) open-shell character of electron spinorbitals; (ii) spin polarization of electron spectrum; (iii) spin contamination; (iv) depriving the spin multiplicity of electronic states; (v) local spin pool at zero total spin density, and so forth greatly extend the view on ground states of graphene and other sp2 nanocarbons and not only give a clear vision of spin peculiarities of graphene chemistry but predicatively point to the occurrence of emergents related to graphene physics, such as ferromagnetism, superconductivity and topological nontriviality. The paper presents numerous experimental evidences supporting a deep interrelationship between emergent chemistry and emergent physics of graphene.
4
Woo, Yun. "Transparent Conductive Electrodes Based on Graphene-Related Materials." Micromachines 10, no. 1 (December 26, 2018): 13. http://dx.doi.org/10.3390/mi10010013.
Повний текст джерелаАнотація:
Transparent conducting electrodes (TCEs) are the most important key component in photovoltaic and display technology. In particular, graphene has been considered as a viable substitute for indium tin oxide (ITO) due to its optical transparency, excellent electrical conductivity, and chemical stability. The outstanding mechanical strength of graphene also provides an opportunity to apply it as a flexible electrode in wearable electronic devices. At the early stage of the development, TCE films that were produced only with graphene or graphene oxide (GO) were mainly reported. However, since then, the hybrid structure of graphene or GO mixed with other TCE materials has been investigated to further improve TCE performance by complementing the shortcomings of each material. This review provides a summary of the fabrication technology and the performance of various TCE films prepared with graphene-related materials, including graphene that is grown by chemical vapor deposition (CVD) and GO or reduced GO (rGO) dispersed solution and their composite with other TCE materials, such as carbon nanotubes, metal nanowires, and other conductive organic/inorganic material. Finally, several representative applications of the graphene-based TCE films are introduced, including solar cells, organic light-emitting diodes (OLEDs), and electrochromic devices.
5
Rastogi, Sarushi, Vasudha Sharma, Meenal Gupta, Pushpa Singh, Patrizia Bocchetta, and Yogesh Kumar. "Methods of Synthesis and Specific Properties of Graphene Nano Composites for Biomedical and Related Energy Storage Applications." Current Nanoscience 17, no. 4 (August 12, 2021): 572–90. http://dx.doi.org/10.2174/1573413716666210106101124.
Повний текст джерелаАнотація:
The concept of graphene in a carbon framework has given rise to enormous improvements to the specific properties of materials. Notably, the combination of graphene with polymeric, metallic and ceramic materials has significantly improved mechanical resistance, electrical and thermal conductivity, and thermal stability of the resulting composite material. In this review, we discuss comprehensive literature on graphene-based composite materials for biomedical and related energy storage applications with emphasis to the synthesis techniques and improved properties of the nanocomposite materials due to graphene addition.
6
Lavagna, Luca, Giuseppina Meligrana, Claudio Gerbaldi, Alberto Tagliaferro, and Mattia Bartoli. "Graphene and Lithium-Based Battery Electrodes: A Review of Recent Literature." Energies 13, no. 18 (September 17, 2020): 4867. http://dx.doi.org/10.3390/en13184867.
Повний текст джерелаАнотація:
Graphene is a new generation material, which finds potential and practical applications in a vast range of research areas. It has unrivalled characteristics, chiefly in terms of electronic conductivity, mechanical robustness and large surface area, which allow the attainment of outstanding performances in the material science field. Some unneglectable issues, such as the high cost of production at high quality and corresponding scarce availability in large amounts necessary for mass scale distribution, slow down graphene widespread utilization; however, in the last decade both basic academic and applied industrial materials research have achieved remarkable breakthroughs thanks to the implementation of graphene and related 1D derivatives. In this work, after briefly recalling the main characteristics of graphene, we present an extensive overview of the most recent advances in the development of the Li-ion battery anodes granted by the use of neat and engineered graphene and related 1D materials. Being far from totally exhaustive, due to the immense scientific production in the field yearly, we chiefly focus here on the role of graphene in materials modification for performance enhancement in both half and full lithium-based cells and give some insights on related promising perspectives.
7
Liu, Qi, Qun Jie Xu, Jin Chen Fan, Yang Zhou, and Long Long Wang. "A Review of Graphene Supported Electrocatalysts for Direct Methanol Fuel Cells." Advanced Materials Research 1070-1072 (December 2014): 492–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.492.
Повний текст джерелаАнотація:
As a fascinating two-dimensional nanomaterial, graphene is attractive for electrocatalytical application in direct methanol fuel cells due to its unique structure and outstanding physical properties. Graphene and its derivatives have been widely used as a support material to improve electrocatalytical activity of catalyst particles for methanol and ethanol oxidations. In this review, discussion is focused on the graphene supported monometallic and bimetallic nanocrystals hybrid materials for electrocatalysts. Additionally, the nitrogen-doped graphene utilized for promising support material in electrocatalysts was also mentioned. We believe that the article will be useful to researchers interested in graphene-based catalyst and related materials for direct methanol fuel cells and provide the present status of the subject.
8
Dubey, Nileshkumar, Ricardo Bentini, Intekhab Islam, Tong Cao, Antonio Helio Castro Neto, and Vinicius Rosa. "Graphene: A Versatile Carbon-Based Material for Bone Tissue Engineering." Stem Cells International 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/804213.
Повний текст джерелаАнотація:
The development of materials and strategies that can influence stem cell attachment, proliferation, and differentiation towards osteoblasts is of high interest to promote faster healing and reconstructions of large bone defects. Graphene and its derivatives (graphene oxide and reduced graphene oxide) have received increasing attention for biomedical applications as they present remarkable properties such as high surface area, high mechanical strength, and ease of functionalization. These biocompatible carbon-based materials can induce and sustain stem cell growth and differentiation into various lineages. Furthermore, graphene has the ability to promote and enhance osteogenic differentiation making it an interesting material for bone regeneration research. This paper will review the important advances in the ability of graphene and its related forms to induce stem cells differentiation into osteogenic lineages.
9
Murthy, H. C. Ananda, Suresh Ghotekar, B. Vinay Kumar, and Arpita Roy. "Graphene: A Multifunctional Nanomaterial with Versatile Applications." Advances in Materials Science and Engineering 2021 (December 24, 2021): 1–8. http://dx.doi.org/10.1155/2021/2418149.
Повний текст джерелаАнотація:
Graphene is a 2D material of high quality obtained from a single atom with unique electronic properties. Graphene has the potential to improve the efficiency, versatility, and durability of a wide range of materials and their applications, but its commercial exploitation will require further study. Due to its flatness and semiconductivity in addition to its high surface area, high mechanical rigidity, high thermal stability, superior thermal conductivity, and electrical conductivity, good biocompatibility, and easy functionalization, graphene is the best candidate for multifunctional applications which opened up new possibilities for potential devices and systems. Every type of graphene material is found to exhibit different and unique tunable properties. Graphene is the best candidate in making nanocomposite-based electrochemical sensors. Graphene is among the best electronic materials, but synthesizing a single sheet of graphene has received less attention. The objective of this chapter is to bring awareness to readers on the synthesis, properties, and applications of graphene. The limitations of the current knowledge base and prospective research directions related to graphene materials have also been illustrated.
10
Zh. Zhumabekov. ""IMPROVING THE ELECTROPHYSICAL PROPERTIES OF NANOCOMPOSITE MATERIALS BASED ON GRAPHENE OXIDE AND TIO2"." Bulletin of Toraighyrov University. Physics & Mathematics series, no. 3.2022 (September 30, 2022): 66–78. http://dx.doi.org/10.48081/ubfy3179.
Повний текст джерелаАнотація:
"This article shows the results related to the study of the effect of graphene oxide on the photoelectric properties of nanostructured titanium dioxide films. A TiO2–GO nanocomposite material with a graphene oxide concentration of 3 wt% was synthesized by hydrothermal method. The Raman and IR spectra of nanocomposite materials have been studied and show the presence of peaks characteristic of graphene oxide and titanium dioxide. In the IR spectra, the so-called Ti-O-C bond is observed, which is responsible for fluctuations between TiO2 and graphene oxide. Studies of absorption spectra show that in a nanocomposite material, the absorption spectrum is shifted to the long-wavelength region of light. Studies of electrophysical properties were carried out using electrochemical impedance spectroscopy. The impedance spectrum of this material shows that there is an improvement when graphene oxide is added to TiO2 films. Photovoltaic parameters also show an increase in the photoinduced current in a nanocomposite material with the addition of graphene oxide by 3 wt%. It is shown that when graphene oxide is added 3 wt% to TiO2, an increase in photocatalytic properties is observed due to an increase in the photoinduced current of the nanocomposite material. "
11
Lan, Yucheng, Mobolaji Zondode, Hua Deng, Jia-An Yan, Marieme Ndaw, Abdellah Lisfi, Chundong Wang, and Yong-Le Pan. "Basic Concepts and Recent Advances of Crystallographic Orientation Determination of Graphene by Raman Spectroscopy." Crystals 8, no. 10 (September 21, 2018): 375. http://dx.doi.org/10.3390/cryst8100375.
Повний текст джерелаАнотація:
Graphene is a kind of typical two-dimensional material consisting of pure carbon element. The unique material shows many interesting properties which are dependent on crystallographic orientations. Therefore, it is critical to determine their crystallographic orientations when their orientation-dependent properties are investigated. Raman spectroscopy has been developed recently to determine crystallographic orientations of two-dimensional materials and has become one of the most powerful tools to characterize graphene nondestructively. This paper summarizes basic aspects of Raman spectroscopy in crystallographic orientation of graphene nanosheets, determination principles, the determination methods, and the latest achievements in the related studies.
12
Yang, Wenbo, Xiangyu Deng, Wei Huang, Xiangcheng Qing, and Zengwu Shao. "The Physicochemical Properties of Graphene Nanocomposites Influence the Anticancer Effect." Journal of Oncology 2019 (July 3, 2019): 1–10. http://dx.doi.org/10.1155/2019/7254534.
Повний текст джерелаАнотація:
Graphene nanocomposite is an inorganic nanocomposite material, which has been widely used in the treatment of tumor at present due to its ability of drug loading, modifiability, photothermal effect, and photodynamic effect. However, the application of graphene nanocomposite is now limited due to the fact that the functions mentioned above are not well realized. This is mainly because people do not have a systematic understanding of the physical and chemical properties of GO nanomolecules, so that we cannot make full use of GO nanomolecules to make the most suitable materials for the use of medicine. Here, we are the first to discuss the influence of the physicochemical properties of graphene nanocomposite on the various functions related to their antitumor effects. The relationship between some important physicochemical properties of graphene nanocomposite such as diameter, shape, and surface chemistry and their functions related to antitumor effects was obtained through analysis, which provides evidence for the application of related materials in the future.
13
Creutzenberg, Otto, Helena Oliveira, Lucian Farcal, Dirk Schaudien, Ana Mendes, Ana Catarina Menezes, Tatjana Tischler, Sabina Burla, and Christina Ziemann. "PLATOX: Integrated In Vitro/In Vivo Approach for Screening of Adverse Lung Effects of Graphene-Related 2D Nanomaterials." Nanomaterials 12, no. 8 (April 7, 2022): 1254. http://dx.doi.org/10.3390/nano12081254.
Повний текст джерелаАнотація:
Graphene-related two-dimensional nanomaterials possess very technically promising characteristics, but gaps exist regarding their potential adverse health effects. Based on their nano-thickness and lateral micron dimensions, nanoplates exhibit particular aerodynamic properties, including respirability. To develop a lung-focused, in vitro/in vivo screening approach for toxicological hazard assessment, various graphene-related nanoplates, i.e., single-layer graphene (SLG), graphene nanoplatelets (GNP), carboxyl graphene, graphene oxide, graphite oxide and Printex 90® (particle reference) were used. Material characterization preceded in vitro (geno)toxicity screening (membrane integrity, metabolic activity, proliferation, DNA damage) with primary rat alveolar macrophages (AM), MRC-5 lung fibroblasts, NR8383 and RAW 264.7 cells. Submerse cell exposure and material-adapted methods indicated material-, cell type-, concentration-, and time-specific effects. SLG and GNP were finally chosen as in vitro biologically active or more inert graphene showed eosinophils in lavage fluid for SLG but not GNP. The subsequent 28-day inhalation study (OECD 412) confirmed a toxic, genotoxic and pro-inflammatory potential for SLG at 3.2 mg/m3 with an in vivo-ranking of lung toxicity: SLG > GNP > Printex 90®. The in vivo ranking finally pointed to AM (lactate dehydrogenase release, DNA damage) as the most predictive in vitro model for the (geno)toxicity screening of graphene nanoplates.
14
Jana, Susmita, Arka Bandyopadhyay, Sujoy Datta, Debaprem Bhattacharya, and Debnarayan Jana. "Emerging properties of carbon based 2D material beyond graphene." Journal of Physics: Condensed Matter 34, no. 5 (November 10, 2021): 053001. http://dx.doi.org/10.1088/1361-648x/ac3075.
Повний текст джерелаАнотація:
Abstract Graphene turns out to be the pioneering material for setting up boulevard to a new zoo of recently proposed carbon based novel two dimensional (2D) analogues. It is evident that their electronic, optical and other related properties are utterly different from that of graphene because of the distinct intriguing morphology. For instance, the revolutionary emergence of Dirac cones in graphene is particularly hard to find in most of the other 2D materials. As a consequence the crystal symmetries indeed act as a major role for predicting electronic band structure. Since tight binding calculations have become an indispensable tool in electronic band structure calculation, we indicate the implication of such method in graphene’s allotropes beyond hexagonal symmetry. It is to be noted that some of these graphene allotropes successfully overcome the inherent drawback of the zero band gap nature of graphene. As a result, these 2D nanomaterials exhibit great potential in a broad spectrum of applications, viz nanoelectronics, nanooptics, gas sensors, gas storages, catalysis, and other specific applications. The miniaturization of high performance graphene allotrope based gas sensors to microscopic or even nanosized range has also been critically discussed. In addition, various optical properties like the dielectric functions, optical conductivity, electron energy loss spectra reveal that these systems can be used in opto-electronic devices. Nonetheless, the honeycomb lattice of graphene is not superconducting. However, it is proposed that the tetragonal form of graphene can be intruded to form new hybrid 2D materials to achieve novel superconducting device at attainable conditions. These dynamic experimental prospects demand further functionalization of these systems to enhance the efficiency and the field of multifunctionality. This topical review aims to highlight the latest advances in carbon based 2D materials beyond graphene from the basic theoretical as well as future application perspectives.
15
Kalita, Golap, and Masayoshi Umeno. "Synthesis of Graphene and Related Materials by Microwave-Excited Surface Wave Plasma CVD Methods." AppliedChem 2, no. 3 (August 30, 2022): 160–84. http://dx.doi.org/10.3390/appliedchem2030012.
Повний текст джерелаАнотація:
Several kinds of chemical vapor deposition (CVD) methods have been extensively used in the semiconductor industries for bulk crystal growth, thin film deposition, and nanomaterials synthesis. In this article, we focus on the microwave-excited surface wave plasma CVD (MW-SWP CVD) method for growth of graphene and related materials. The MW-SWP CVD system consisting of waveguide, slot antenna, and dielectric windows is significant for generating high density plasma with low electron temperature, enabling low temperature growth of materials without damaging the surface of base substrates. The synthesis of graphene and hexagonal boron nitride (hBN) films has been achieved on metals, semiconductors, insulators, and dielectric substrates for application in photovoltaics, sensors, batteries, supercapacitors, fuel cells, and various other electronic devices. The details of the synthesis process for graphene films, vertically-oriented graphene, doped-graphene, and hBN films by the MW-SWP CVD method are summarized to understand the growth mechanism, which will enable further development of the plasma CVD process for material synthesis at a low temperature for industrial applications.
16
Kaul, Anupama B. "Graphene and The Advent of Other Layered-2D Materials for Nanoelectronics, Photonics and Related Applications." MRS Proceedings 1549 (2013): 11–16. http://dx.doi.org/10.1557/opl.2013.812.
Повний текст джерелаАнотація:
ABSTRACTCarbon-based nanostructures have been the center of intense research and development for more than two decades now. Of these materials, graphene, a two-dimensional (2D) layered material system, has had a significant impact on science and technology in recent years after it was experimentally isolated in single layers in 2004. The recent emergence of other classes of 2D layered systems beyond graphene has added yet more exciting and new dimensions for research and exploration given their diverse and rich spectrum of properties. For example, h-BN a layered material closest in structure to graphene, is an insulator, while NbSe, a transition metal dichalcogenide is metallic and monolayers of other transition metal di-chalcogenides such as MoS2 are direct band-gap semiconductors. The rich variety of properties that 2D layered material systems offer can potentially be engineered on-demand, and creates exciting prospects for their device and technological applications ranging from electronics, sensing, photonics, energy harvesting and flexible electronics in the near future.
17
Xu, Xiaowei, Rongna Wang, Dachao Zhang, and Yingge Feng. "Clinical Application of Graphene Composite in Internal Fixation of Ankle Fracture in Sports." Advances in Materials Science and Engineering 2022 (August 25, 2022): 1–9. http://dx.doi.org/10.1155/2022/2504511.
Повний текст джерелаАнотація:
The ankle joint consists of the tibia, the fibrous lower end, and the talus. Osteoporotic fractures and deboning are common injuries in orthopaedic surgery, often due to abnormal disorders following an ankle fracture. Various fractures can occur depending on the shape, size, and position of the foot at the time of the injury. With the continuous development of science and the continuous improvement of modern sports level, scientists and sports workers worldwide recognize the importance of applying new materials in sports equipment. Composite material is a combination of multiphase combination material. In short, two or more components with different properties and different forms are used in a multimaterial combination of composite means. The organic combination of related scientific equipment and composite materials promotes the development of sports equipment and the probability of reducing sports injury. The function of the existing graphene composite is analyzed and applied, and the combination of graphene composite and sports is realized theoretically. The clinical application of graphene composite in sports is studied to promote sports development. This article mainly studies the clinical application of graphene composite in ankle fracture internal fixation in sports. It is found that with the increasingly mature application of graphene rubber composite, graphene fiber composite, and other graphene composite materials, it can be widely used in all aspects of sports equipment. Graphene composite materials can be used more easily in sports equipment. In this article, the thermal material conversion algorithm, Schrodinger equation in quantum mechanics, and the use method of graphene composite materials are used to study the clinical application of graphene composite in the internal fixation of ankle joint fracture in sports. The frequent injury and instability of ankle and knee joints are signs of ankle and knee joint injury. The main factors that affect the instability of ankle and knee function are the comprehensive effects of motion range, muscle force valgus, and body feeling, and graphene composite materials are widely used in the internal fixation of ankle joint fracture in sports. The results show that graphene composite can be used in sports equipment and has a great space and high feasibility through the analysis of four groups of sports equipment. It shows that advanced materials play a very important role in the research of sports equipment.
18
Abbas, Qaisar, Pragati A. Shinde, Mohammad Ali Abdelkareem, Abdul Hai Alami, Mojtaba Mirzaeian, Arti Yadav, and Abdul Ghani Olabi. "Graphene Synthesis Techniques and Environmental Applications." Materials 15, no. 21 (November 4, 2022): 7804. http://dx.doi.org/10.3390/ma15217804.
Повний текст джерелаАнотація:
Graphene is fundamentally a two-dimensional material with extraordinary optical, thermal, mechanical, and electrical characteristics. It has a versatile surface chemistry and large surface area. It is a carbon nanomaterial, which comprises sp2 hybridized carbon atoms placed in a hexagonal lattice with one-atom thickness, giving it a two-dimensional structure. A large number of synthesis techniques including epitaxial growth, liquid phase exfoliation, electrochemical exfoliation, mechanical exfoliation, and chemical vapor deposition are used for the synthesis of graphene. Graphene prepared using different techniques can have a number of benefits and deficiencies depending on its application. This study provides a summary of graphene preparation techniques and critically assesses the use of graphene, its derivates, and composites in environmental applications. These applications include the use of graphene as membrane material for the detoxication and purification of water, active material for gas sensing, heavy metal ions detection, and CO2 conversion. Furthermore, a trend analysis of both synthesis techniques and environmental applications of graphene has been performed by extracting and analyzing Scopus data from the past ten years. Finally, conclusions and outlook are provided to address the residual challenges related to the synthesis of the material and its use for environmental applications.
19
König, Roger, Maurizio Cuomo, Elisa Pianta, Antoine Buetti, Federica Mauri, Matteo Tanadini, and Pamela Principi. "Addition of Conductive Materials to Support Syntrophic Microorganisms in Anaerobic Digestion." Fermentation 8, no. 8 (July 26, 2022): 354. http://dx.doi.org/10.3390/fermentation8080354.
Повний текст джерелаАнотація:
Syntrophy and interspecies electron transfer among different microbial groups occurs in anaerobic digestion, and many papers recently reported their positive effect on biogas and methane production. In this paper, we present the results on the effect of conductive material, i.e., graphene, PAC and biochar addition in 3.5 L batch experiments, analyzing the biogas production curve. A peculiar curve pattern occurred in the presence of conductive materials. Compared to the respective controls, the addition of graphene produced a biogas surplus of 33%, PAC 20% and biochar 8%. Microbial community molecular analysis showed that syntrophic microorganisms present in the inoculum were stimulated by the conductive material addition. Graphene also appears to promote an interspecies electron transfer between Geobacter sp. and ca. Methanofastidiosum. This paper contributes to the understanding of the DIET-related microbial community dynamic in the presence of graphene and PAC, which could be exploited to optimize biogas and methane production in real-scale applications.
20
Ptak, Mariusz, Paweł Kaczyński, Johannes Wilhelm, José M. T. Margarido, Paula A. A. P. Marques, Susana C. Pinto, Ricardo J. Alves de Sousa, and Fábio A. O. Fernandes. "Graphene-Enriched Agglomerated Cork Material and Its Behaviour under Quasi-Static and Dynamic Loading." Materials 12, no. 1 (January 4, 2019): 151. http://dx.doi.org/10.3390/ma12010151.
Повний текст джерелаАнотація:
The use of cork for a variety of applications has been gaining significance due to environmental concerns and political agendas. Consequently, its range of applications is growing rapidly. In this work, aiming to improve its mechanical response for crashworthiness applications, cork agglomerates were enriched by small quantities of graphene oxide or graphene nanoplates in order to observe a resulting improvement of the mechanical behaviour during quasi-static and dynamic compressive loading cases. To produce homogenous cork agglomerates including graphene, the material was previously dispersed into granulated cork using stirrers to achieve a good distribution. Then, the typical procedure of compression and curing was carried out. Magnified images attest a good dispersion of graphene into the cork matrix. Mechanical testing was performed for a variety of graphene concentrations (0.1, 0.5 and 1.0 weight %), becoming clear that the beneficial effect of including graphene (either oxide or nanoplates) is related to a later densification stage while keeping the same stress plateau levels.
21
Zhang, Zhipan, Jing Zhang, Nan Chen, and Liangti Qu. "Graphene quantum dots: an emerging material for energy-related applications and beyond." Energy & Environmental Science 5, no. 10 (2012): 8869. http://dx.doi.org/10.1039/c2ee22982j.
Повний текст джерела
22
Cao, Ning, and Yuan Zhang. "Study of Reduced Graphene Oxide Preparation by Hummers’ Method and Related Characterization." Journal of Nanomaterials 2015 (2015): 1–5. http://dx.doi.org/10.1155/2015/168125.
Повний текст джерелаАнотація:
As a novel two-dimensional carbon material, graphene has fine potential applications in the fields of electron transfer agent and supercapacitor material for its excellent electronic and optical property. However, the challenge is to synthesize graphene in a bulk quantity. In this paper, graphite oxide was prepared from natural flake graphite by Hummers’ method through liquid oxidization, and the reduced graphene oxide was obtained by chemical reduction of graphene oxide using NH3·H2O aqueous solution and hydrazine hydrate. The raw material graphite, graphite oxide, and reduced graphene oxide were characterized by X-ray diffraction (XRD), attenuated total reflectance-infrared spectroscopy (ATR-IR), and field emission scanning electron microscope (SEM). The results indicated that the distance spacing of graphite oxide was longer than that of graphite and the crystal structure of graphite was changed. The flake graphite was oxidized to graphite oxide and lots of oxygen-containing groups were found in the graphite oxide. In the morphologies of samples, fold structure was found on both the surface and the edge of reduced graphene oxide.
23
Kumar, Vydha Pradeep, and Deepak Kumar Panda. "Review—Next Generation 2D Material Molybdenum Disulfide (MoS2): Properties, Applications and Challenges." ECS Journal of Solid State Science and Technology 11, no. 3 (March 1, 2022): 033012. http://dx.doi.org/10.1149/2162-8777/ac5a6f.
Повний текст джерелаАнотація:
The advancement of new 2D-TMDC material semiconductors remains a prominent research area as the number of scientific applications grows. One Of those materials, “molybdenum disulfide,” has newly investigated to graphene & Si material alternative. Single-layer molybdenum disulfide (SLMoS2) is used as substitute for graphene & other semiconductor appliances with a high capability of practices in nano-electronic, energy-storing, photocatalysts, optical sensors, biosensors & Electro-Chemical biosensors. It’s working even in widespread variety of energy-related applications, including batteries, solar cells, microwaves, & Terahertz. Furthermore, future hopeful material in nano-scale fields, having additional opportunities in spintronics & magneto-resistance.Many research papers have published papers on the Evolution & Application of MoS2 materials but here in the paper, will give a complete depth comprehensive examination & analysis of the evolution of various 2D materials, starting with their state of requirement, formation, properties, applications, future challenges along with the various comparison simulation results.
24
Okhay, Olena, and Alexander Tkach. "Impact of Graphene or Reduced Graphene Oxide on Performance of Thermoelectric Composites." C 7, no. 2 (April 21, 2021): 37. http://dx.doi.org/10.3390/c7020037.
Повний текст джерелаАнотація:
In recent years, worldwide research has been focused on clean and sustainable energy sources that can respond to the exponentially rising energy demands of humankind. The harvesting of unused heat in relation to automotive exhaustion, industrial processes, and home heating is one possible way of enabling the transformation from a fossil fuel-based society to a low-carbon socioeconomic epoch. Thermoelectric (TE) generators can convert heat to electrical energy thanks to high-performance TE materials that work via Seebeck effects when electricity appears between the cold part and the hot part of these materials. High figure of merit (ZT) TE material is characterized by high electrical conductivity and Seebeck coefficient, together with low thermal conductivity. This article aims to summarize ZT values reported for chalcogenides, skutterudites, and metal oxides with graphene (G) or reduced graphene oxide (rGO), and intends to understand the relationship between the addition of G-rGO to composites and ZT variation. In a majority of the publications, ZT value increases with the addition of G/rGO, although the relative growth of ZT varies for different material families, as well as inside the same group of materials, with it often being related not to a G/rGO amount but with the quality of the composite.
25
Musliha Ajmal Mokhtar, Siti, Mastura Omar, Zahari Abu Bakar, Yusmeeraz Yusof, Zairi Ismael Rizman, and . "Graphene-Based Wearable Electrochemical Glucose Biosensor: A Review." International Journal of Engineering & Technology 7, no. 3.14 (July 25, 2018): 250. http://dx.doi.org/10.14419/ijet.v7i3.14.16902.
Повний текст джерелаАнотація:
An overview of recent advancement in wearable glucose biosensor has been reviewed. The large sensing area, superior conductivity and high tensile strength has become key factors of graphene as material for flexible and wearable electronic device. This review discusses development and challenges based on graphene and its related materials of recent electrochemical glucose biosensor towards fast response, good selectivity, superb reproducibility and outstanding flexibility. A details comparison in terms of sensitivities, low detection limits and long-term stabilities are included. This review will also provide new insight into invasive and non-invasive methods as future prospect of wearable glucose biosensor.
26
Munuera, J., L. Britnell, C. Santoro, R. Cuéllar-Franca, and C. Casiraghi. "A review on sustainable production of graphene and related life cycle assessment." 2D Materials 9, no. 1 (December 28, 2021): 012002. http://dx.doi.org/10.1088/2053-1583/ac3f23.
Повний текст джерелаАнотація:
Abstract Advanced materials such as graphene and the family of two-dimensional crystals are very attractive because of the myriad of applications that could be developed based on their outstanding properties. However, as soon as material development reaches enough maturity for production to be scaled up and to enter the market within products, it is crucial to place the technology in the context of possible risks to economic well-being, social equity and environmental harm. This review aims at highlighting the current state of art on sustainable development of graphene-related materials and related environmental impact assessment studies using life cycle assessment (LCA). We show that sustainable development has focused mostly on the use of waste or low cost materials as precursors. However, the findings from relevant LCA studies reveals the limits of this approach, which does not take into account that waste recycling is often very energy intensive. We provide an overview on the life cycle environmental impact assessment, with a focus on global warming potential and energy demand, carried out on different graphene productions methods for specific applications, ranging from composites to electronics. Finally, an outlook is given focussing on the comparison of the different production routes and the results from the LCA.
27
Popov, V. S., V. P. Ponomarenko, and S. V. Popov. "2D Material-Based Photo- and Nanoelectronics. Part III. Photosensors Based on Graphene, Graphene-Like, and Related 2D Nanomaterials." Journal of Communications Technology and Electronics 67, no. 9 (September 2022): 1152–74. http://dx.doi.org/10.1134/s1064226922090133.
Повний текст джерела
28
Zhou, Fanglei, Mahdi Fathizadeh, and Miao Yu. "Single- to Few-Layered, Graphene-Based Separation Membranes." Annual Review of Chemical and Biomolecular Engineering 9, no. 1 (June 7, 2018): 17–39. http://dx.doi.org/10.1146/annurev-chembioeng-060817-084046.
Повний текст джерелаАнотація:
Two-dimensional, graphene-based materials have attracted great attention as a new membrane building block, primarily owing to their potential to make the thinnest possible membranes and thus provide the highest permeance for effective sieving, assuming comparable porosity to conventional membranes and uniform molecular-sized pores. However, a great challenge exists to fabricate large-area, single-layered graphene or graphene oxide (GO) membranes that have negligible undesired transport pathways, such as grain boundaries, tears, and cracks. Therefore, model systems, such as a single flake or nanochannels between graphene or GO flakes, have been studied via both simulations and experiments to explore the transport mechanisms and separation potential of graphene-based membranes. This article critically reviews literature related to single- to few-layered graphene and GO membranes, from material synthesis and characteristics, fundamental membrane structures, and transport mechanisms to potential separation applications. Knowledge gaps between science and engineering in this new field and future opportunities for practical separation applications are also discussed.
29
Sha, Xudong, and Li Zhao. "Mathematical Model and Simulation Calculation Method Based on the Exfoliation of Single-Layer Graphene from Dispersed Carbon Nanotubes." Journal of Nanomaterials 2022 (June 14, 2022): 1–11. http://dx.doi.org/10.1155/2022/8503507.
Повний текст джерелаАнотація:
Graphene is a two-dimensional material with excellent performance and unique structure. Since its successful manufacturing in 2004, it has quickly become a research hotspot in the fields of materials, chemistry, physics, and engineering. This article focuses on the study of exfoliated single-layer graphene based on dispersed carbon nanotubes and understands the related theories of carbon nanotubes and exfoliated single-layer graphene on the basis of literature data. The mathematical model and simulation calculation method are analyzed, and then, the effect of the single-layer graphene peeling based on the dispersed carbon nanotubes is tested, mainly to the experimental verification of the peeling process parameters and the influence of the dispersant on the peeling effect, and then, the peeled graphite quality of the graphene was tested, and the test results showed that the thickness of single-layer pure graphene is 0.6-0.9 nm, and the experimental statistics show that the graphene of single-layer and double-layer occupies 81% of the experimental sample; most of the single-layer graphene exfoliated based on dispersed carbon nanotubes in this paper is single-layer, two-layer graphene, and a relatively small amount of multilayer graphene.
30
Garg, Raghav, Daniel San Roman, and Tzahi Cohen-Karni. "Multidimensional graphene nanostructures – synthesis and applications." Pure and Applied Chemistry 92, no. 12 (December 16, 2020): 1929–36. http://dx.doi.org/10.1515/pac-2020-0801.
Повний текст джерелаАнотація:
AbstractConventional graphene electronics fail to leverage the exceptional surface-area-to-volume ratio of graphene due to the challenges imposed by arranging two-dimensional (2D) nanomaterials in three-dimensional (3D) spaces. Recently, a new topology of graphene, nanowire template 3D fuzzy graphene (NT-3DFG), has been developed to overcome this limitation. We provide an overview of the unique physical and chemical properties of NT-3DFG that are a direct consequence of the material structure and describe NT-3DFG’s promising applications in bioelectronics and energy-related research.
31
Prasad Verma, Rajendra, and Sharad Chandra Srivastava. "Discussion on an Overview of Graphene Nanocomposites and Dielectric Elastomers." Journal of Futuristic Sciences and Applications 1, no. 2 (2018): 1–16. http://dx.doi.org/10.51976/jfsa.121801.
Повний текст джерелаАнотація:
This article examines the most current advancements in dielectric elastomer actuator technology. The adaptability of these actuators makes them helpful in a wide range of situations. Dielectric elastomers, a kind of electroactive polymer, undergo a transformation when subjected to an electric field. When compared to piezoelectric materials, shape memory alloys, ionic polymer metallic materials, and form memory alloys, EAPs' applicability for the design of a broad range of sensors, actuators, and biomedical equipment is better. Because EAPs are able to preserve their original shape even after being distorted, this is why they are so effective. Since EAPs are light, adaptable, simple to manufacture, economically viable, and compatible with surfaces and geometries of varying complexity, this is the case. Shape-memory alloys and materials with piezoelectric characteristics are also included. The working electric field is rather intense, and the dielectric constant is quite low, making this material challenging to deal with. This is the most significant stumbling block in the process of dealing with this particular substance. One way to deal with this problem is to use filler materials that are extremely conductive, such as graphene oxide (GO), reduced graphene oxide (RGO), or functionalized graphene oxide. Functionalized graphene oxide and reduced graphene oxide are other possible techniques. In addition to functionalized graphene oxide and reduced graphene oxide, there are two more ways that might be used. A lot of choices are now at your disposal, including this one. Actuators that rely on this material may now be built since EAPs composites have been created with a typical low operating voltage (on the request for 50 V/m). To put it another way, we can now design actuators that are reliant on this material. These materials are used as actuators in many different types of control, adaptable, and automated systems, including many different academic areas, such as science, electromechanics, and others. [For instance:] There are several examples of this, such as: [As an illustration:] ... [Here's a great example of] There are a number of issues related with the usage of electroactive polymers (EAPs) in this study, which was focused on the operating principle and actuation mechanism.
32
Chang, Hai-Chou, and Ding-Tsai Hsu. "Interactions of ionic liquids and surfaces of graphene related nanoparticles under high pressures." Physical Chemistry Chemical Physics 19, no. 19 (2017): 12269–75. http://dx.doi.org/10.1039/c7cp00978j.
Повний текст джерела
33
Gierak, Jacques, Gilles Raynaud, Caroline Guiziou, Jean René Coudevylle, Ali Madouri, Lars Bruchhaus, Achim Nadzeyka, et al. "Selective growth of graphene films on gallium-focused ion beam irradiated domains." Journal of Vacuum Science & Technology B 40, no. 5 (September 2022): 052602. http://dx.doi.org/10.1116/6.0002104.
Повний текст джерелаАнотація:
Graphene, a single layer of carbon atoms tightly bound in a hexagonal honeycomb lattice to form a two-dimensional lattice, is a very interesting material with promising electronic, optical, chemical, and mechanical applicative potential [Geim and Novoselov, Nat. Mater. 6, 183 (2007)]. The properties of graphene make it suitable for a wide range of applications; however, its applicative future still depends on large scale technologies capable to robustly and reproducibly transfer its outstanding intrinsic properties into devices or complex structures. It must be recognized that a crucial technological problem, that still inhibits the applicability of high quality graphene material properties, is related to the patterning of this material using traditional top down instruments and lithographical methods. In this work, we will detail our investigations on applying a precise 30 keV Ga+ ion irradiation to selectively shape and modify a copper precursor surface for promoting the local growth of graphene surface domains. The morphology of these domains is investigated using scanning tunneling microscopy and spectroscopy to probe simultaneously the structural and the electronic properties at the atomic scale of the graphene films.
34
Edward, Kaamil, Kabir Mamun, Sumesh Narayan, Mansour Assaf, David Rohindra, and Upaka Rathnayake. "State-of-the-Art Graphene Synthesis Methods and Environmental Concerns." Applied and Environmental Soil Science 2023 (February 2, 2023): 1–23. http://dx.doi.org/10.1155/2023/8475504.
Повний текст джерелаАнотація:
Graphene, a 2D sp2 hybridized carbon sheet consisting of a honeycomb network, is the building block of graphite. Since its discovery in 2004, graphene’s exceptional electronic and mechanical properties have peaked interest in various applications. However, the inability to mass produce high-quality graphene affordably currently limits the practical application of the material. Researchers are continuously working on advancing graphene synthesis methods to alleviate these limitations. Therefore, this review looks at the overview of established graphene synthesis methods and characterization techniques, and then highlights an in-depth review of graphene production through flash joule heating. The environmental concerns related to graphene synthesis are also presented in this review paper.
35
Zhang, Haoran, Juntao Zhao, Tieling Xing, Shenzhou Lu, and Guoqiang Chen. "Fabrication of Silk Fibroin/Graphene Film with High Electrical Conductivity and Humidity Sensitivity." Polymers 11, no. 11 (October 28, 2019): 1774. http://dx.doi.org/10.3390/polym11111774.
Повний текст джерелаАнотація:
Silk fibroin (SF) is a natural material with good biocompatibility and excellent mechanical properties, which are complementary to graphene with ultrahigh electrical conductivity. In this study, to maximally combine graphene and silk fibroin, a well-dispersed silk fibroin/graphene suspension was successfully prepared in a simple and effective way. Then we prepared a flexible conductive SF/graphene film with a minimum resistance of 72.1 ± 4.7 Ω/sq by the casting method. It was found that the electrical conductivity of the SF/graphene film was related to the water content of the film, and the variation was more than 200 times. Therefore, it will play an important role in the field of humidity sensors. It also has excellent mechanical properties in both wet and dry states. These unique features make this material a promising future in the fields of biomedical applications, wearable sensors, and implantable internal sensors.
36
Shchegolkov, Alexandr V., Mikhail Chayka, Evgeny V. Galunin, Alexey V. Shchegolkov, Nariman R. Memetov, and Alexey G. Tkachev. "Studies on Highly Porous Graphene-Like Structures as Electrode Material for Supercapacitors." Materials Science Forum 845 (March 2016): 259–62. http://dx.doi.org/10.4028/www.scientific.net/msf.845.259.
Повний текст джерелаАнотація:
The paper presents studies on highly porous graphene-like structures as an electrode material for supercapacitors. The experimental research was performed in inorganic (3 M sulfuric acid) and organic (1 M tetraethylammonium tetrafluoroborate in acetonitrile) electrolytes. It was found that in the inorganic medium the electrodes made on the basis of graphene-like structures possess higher specific capacitance. When increasing the potential scan rate from 5 to 100 mV/s the “electrode-electrolyte” system lost 40-80% of the capacitance. The cyclic current-voltage curves obtained for the organic electrolyte were more strongly distorted when increasing the potential scan rate, which might be related to more severe transport limitations imposed on large organic ions.
37
Rahman, Md Mahfuzur, Mohaiminul Islam, Rakesh Roy, Hassan Younis, Maryam AlNahyan, and Hammad Younes. "Carbon Nanomaterial-Based Lubricants: Review of Recent Developments." Lubricants 10, no. 11 (October 27, 2022): 281. http://dx.doi.org/10.3390/lubricants10110281.
Повний текст джерелаАнотація:
This review article summarizes the progress of research on carbon nanomaterial-based lubricants witnessed in recent years. Carbon nanomaterials, such as graphene, carbon nanotubes (CNTs), fullerenes and carbon nanostructures, are at the center of current tribological research on attaining superior lubrication performance. The development of nanomaterial-based solid lubricants, lubricant additives and bulk materials and the related issues in their processing, characterization and applications as well as their tribological performance (coefficient of friction and wear rate) are listed in a structured tabulated form. Firstly, regarding nanomaterial-based solid lubricants, this study reveals that carbon nanomaterials such as graphite, graphene, graphene-based coatings and diamond-like carbon (DLC)-based coatings increase different tribological properties of solid lubricants. Secondly, this study summarizes the influence of graphene, carbon nanotubes, fullerene, carbon nanodiamonds, carbon nano-onions, carbon nanohorns and carbon spheres when they are used as an additive in lubricants. Thirdly, a structured tabulated overview is presented for the use of carbon nanomaterial-reinforced bulk material as lubricants, where graphene, carbon nanotubes and carbon nanodiamonds are used as reinforcement. Additionally, the lubricity mechanism and superlubricity of carbon nanomaterial-based lubricants is also discussed. The impact of carbon nanotubes and graphene on superlubricity is reviewed in detail. It is reported in the literature that graphene is the most prominent and widely used carbon nanomaterial in terms of all four regimes (solid lubricants, lubricating additives, bulk material reinforcement and superlubricity) for superior tribological properties. Furthermore, prospective challenges associated with lubricants based on carbon nanomaterials are identified along with future research directions.
38
Gong, Youning, and Chunxu Pan. "Preparation of High-quality Graphene via Electrochemical Exfoliation in Acidic Electrolytes: A Review." MRS Advances 2, no. 30 (2017): 1611–19. http://dx.doi.org/10.1557/adv.2017.62.
Повний текст джерелаАнотація:
ABSTRACTSince the discovery of graphene in 2004, graphene has already been one of the researching hotspots in the material science. As a promising method, electrochemical exfoliation has drawn great attention for producing graphene on industrial scale with high efficiency, low cost, and non-pollution. However, like other wet-chemical methods, the induced oxidation and chemical functionalization are unavoidable during the exfoliation process. Several solutions have been reported to overcome this issue and improve the graphene quality. In this review, we summarize the recent progress in preparation and potential applications of high-quality graphene via electrochemical exfoliation in acidic electrolytes, focusing on the technological innovation and related properties of obtained high-quality graphene.
39
Marath Santhosh, Neelakandan Marath, Ana Dias, Janez Zavašnik, Elena Stefanova Tatarova, and Uros Cvelbar. "Single-Step Atmospheric Pressure Plasma-Enabled Designing of Graphene Hybrids: A Green Approach for Energy Storage Materials." ECS Meeting Abstracts MA2022-02, no. 19 (October 9, 2022): 891. http://dx.doi.org/10.1149/ma2022-0219891mtgabs.
Повний текст джерелаАнотація:
Considering the increasing demand for advanced energy materials for future energy-related applications, designing promising materials at a low cost is critical. Given the importance of structural design and morphological features of the designed material in energy applications, fabricating materials at the nanoscale with controlled morphology and orientation is important. Recently 2-dimensional graphene-based materials have emerged as a potential candidate for next-generation energy applications. However, conventional chemical and physical routes for producing high-quality graphene have certain limitations either due to the cost or the processing time. Therefore, an advanced technique for designing and processing graphene structures at the atomic scale is needed to produce high-quality materials. In this regard, safe and clean environmentally-friendly plasma-enabled techniques have been explored as a potential method to tailor different structures at the nanoscale. As a synthesis approach, plasma assembles the nanostructures from gaseous into a solid form. Therefore, this paper suggests the advantages of atmospheric pressure plasma-enabled approaches to design and engineer graphene-based materials at the nanoscale with high structural quality and controllability with hybrid morphologies. Here, a novel, single-step microwave plasma-enabled approach at atmospheric conditions used to design hybrid high-quality graphene-based nanostructures is presented. The plasma techniques allow the synthesis of high-quality N-graphene (nitrogen-doped graphene) metal-based nanostructures at one of the fastest production rates of ∼ 19 mg/min. The graphene production is carried out in the high energy density zone of microwave plasma, and the growth of N-graphene sheets occurred in the afterglow region. Spraying metal particle-containing gases into this zone allows the formation of hybrid N-graphene structures anchored with metal oxide/sulphide nanoparticles. Structural and morphological analysis of these hybrids using different microscopic and spectroscopic techniques confirmed the high structural quality and distribution of metal-based nanostructures on N-graphene sheets. This fast and facile approach is expected to provide a significant impact on designing high-quality graphene hybrids, which can be used for sustainable energy storage applications.
40
Kornilov, Denis Yu. "THE INFLUENCE OF THE THERMAL REDUCTION TEMPERATURE ON THE STRUCTURE AND ELECTROPHYSICAL PROPERTIES OF REDUCED GRAPHENE OXIDE FILMS." Journal of the Russian Universities. Radioelectronics 22, no. 3 (July 2, 2019): 88–96. http://dx.doi.org/10.32603/1993-8985-2019-22-3-88-96.
Повний текст джерелаАнотація:
Introduction. An incomplete list of graphene properties includes high electric conductivity, thermal conductivity, strength, large surface area, high light transmittance. Graphene is a very promising material from the point of view of its application in micro- and nanoelectronics. In addition, graphene advantage is a possibility of its obtaining by various ways. It allows creating materials with desired physicochemical properties by using appropriate technological methods. Objective. The investigation of a thermal reduction temperature influence on physicochemical properties of graphene oxide (GO) films. Materials and methods. In the present work, GO films are obtained on a slide surface by its immersing and removing from a graphene oxide water dispersion (dip coating). Obtained samples are studied by methods of scanning electron microscopy, Raman spectroscopy, and elemental CHN analysis. A sheet resistance is measured by a four-point probes method. Results. A content difference of elements (C, H, N) in studied samples, and both graphene structure defectiveness and sheet resistance decrease, are found to be proportional to a reduction temperature increase. A GO films thickness decrease during a heat treatment is also observed, which is presumably associated with a functional GO groups loss while thermal reduction. Conclusion. Research results demonstrate a possibility of a carbon films with desired physicochemical properties obtaining from a reduced graphene oxide (RGO), which can be used in thin-film technologies. Presented materials can also be useful in issues related to GO and RGO obtaining and applying.
41
Ahmad, R., M. S. Shamsudin, Mohd Zainizan Sahdan, M. Rusop, and S. M. Sanip. "Green and Economic Transparent Conductive Graphene Electrode for Organic Solar Cell: A Short Review." Advanced Materials Research 832 (November 2013): 316–21. http://dx.doi.org/10.4028/www.scientific.net/amr.832.316.
Повний текст джерелаАнотація:
New market trend for organic solar cell (OSC) require lightweight, cost effective, environmentally friendly and flexible. Transparent conductive electrode (TCE) is a main building block in organic solar cell in determining the device performance. Indium tin oxide (ITO) is widely used as transparent conductive material however it has major drawbacks due to relatively expensive, brittle and it limited to use on flexible substrate. This paper provides a short review of the transparent conductive electrode material which required for OSC applications. Issues related with existing TCE material such as ITO is also highlighted. Thus, alternative green material resources which offer low cost, environmentally friendly, mechanically robust and low sheet resistances are strongly required. Graphene is suitable candidate due to their outstanding properties such as good electrical, green material, chemical and thermally stable as well as remarkable mechanical strength and flexibility. The performance of transparent graphene electrode using low cost fabrication method which related with electrical, optical and power conversion efficiency was reviewed. We believed this work will provide beneficial input toward the improvement of OSC device performance.
42
Vitiello, Miriam Serena. "Bi-dimensional materials for THz frequency nanodevices." Photoniques, no. 101 (March 2020): 39–46. http://dx.doi.org/10.1051/photon/202010139.
Повний текст джерелаАнотація:
Although artificial semiconductor heterostructures have long been the core material system for the generation, detection and manipulation of carriers, at TeraHertz (THz) frequencies, the discovery of graphene and the related intriguing abilities have triggered an unprecedented interest in inorganic two-dimensional (2D) materials, as black phosphorus and boron nitride, amongst many others. They offer a unique platform for developing efficient devices, without the need of lattice matching, and with a variety of physical properties, that can be engineered from scratch, exploiting the material structures, the layer thickness or their inherent anisotropy.
43
Ramanujam, N., S. Muthukumaran, B. Nagesawara Rao, M. Ramarao, Amol L. Mangrulkar, K. S. Ashraff Ali, L. Pugazhendhi, and Mebratu Markos. "Experimental Investigations on Mechanical Properties of AZ31/Eggshell Particle-Based Magnesium Composites." Advances in Materials Science and Engineering 2022 (January 30, 2022): 1–7. http://dx.doi.org/10.1155/2022/4883764.
Повний текст джерелаАнотація:
Magnesium (AZ31) is an excellent choice for a bionic implant. To enhance biocompatibility, the hardest graphene nanoparticles were reinforced with biocompatible materials. In this paper, biocompatibility composite material is produced by stir-casting nanoshell particles reinforced with various weight percentages (0, 1, 2, 3, and 4 wt. percent) of AZ31 magnesium alloy. To understand the mechanical properties of the composite material, results of which are compared to the base alloy (AZ31) are used. The study mentioned how AZ31 magnesium alloy, reinforced with reinforcing particles, may be used to create implant-related human bone materials. Magnesium alloy reinforced with reinforcing particles is described in the study.
44
Acebedo Martinez, Francisco Javier, Ana Voltes-Martínez, Elena López Ruíz, Duane Choquesillo-Lazarte, Jorge Fernando Fernández-Sánchez, Juan Antonio Marchal, and Jaime Gómez-Morales. "Apatite-Graphene and Apatite-Graphene Oxide Nanocomposites: Hybrid Materials with Tailored Biological and Luminescent Properties." Solid State Phenomena 340 (December 23, 2022): 137–41. http://dx.doi.org/10.4028/p-bc0q6b.
Повний текст джерелаАнотація:
Apatite nanocomposites with graphene (G) or graphene oxide (GO) nanoflakes, as well as with related carbonaceous materials, present promising applications in hard tissue engineering, biomedicine, or drug delivery. Different methodologies have been explored in the last years to prepare apatite-based nanocomposites. Sitting drop vapour diffusion (SDVD) methodology induces the heterogeneous nucleation of biomimetic apatite on the reinforcement material, improving biological properties of the nanocomposites. In this work SDVD was used to prepare G-apatite and GO-apatite nanocomposites. Prior to the SDVD experiments, G flakes were obtained by sonication-assisted liquid-phase exfoliation (LPE) using L-Alanine (L-Aln) as dispersing biomolecule, while a commercial aqueous Graphene Oxide (GO) dispersion was used for the nucleation essays in presence of the same biomolecules. A parallel set of nucleation experiments was performed in presence of Tb3+ ions, to endow the nanocomposites of luminescent properties. Characterization by XRD, FTIR, and TEM demonstrated the heterogeneous nucleation of needle-shaped apatite nanocrystals on the surfaces of G and GO flakes. Fluorescence spectroscopy certified the presence of Tb3+ ions in the nanocomposites resulting in luminescent materials which can be used in imaging or theragnostic. Finally, in vitro tests with human mesenchymal stem cells revealed excellent cytocompatibility and cell proliferation in presence of the nanocomposites.
45
Liang, Yingjing, Jietao Huang, Jianxin Qu, Jianzhang Huang, and David Hui. "Research on the auxetic behavior and mechanical properties of periodically rotating graphene nanostructures." Nanotechnology Reviews 11, no. 1 (January 1, 2022): 1733–43. http://dx.doi.org/10.1515/ntrev-2022-0098.
Повний текст джерелаАнотація:
Abstract Negative Poisson’s ratio (auxetic) material is one of the most widely studied metamaterials, and recent attempts have been made to discover auxeticity in graphene-based and related carbon-based materials. However, it is shown that negative Poisson’s ratio effect requires special conditions, such as high temperature. Achieving negative Poisson’s ratio effect under large strain at ambient conditions is the key to graphene materials in nano-device applications. In order to discover the auxetic properties of nanostructures under large strain, this article proposes periodically rotating graphene nanostructures (PRGNs) which are the combination of graphene and rotating rigid unit structures. Poisson’s ratio, Young’s modulus, and damage mechanism of PRGNs are investigated using molecular dynamics simulation. It can be possible to conclude that PRGNs can also exhibit auxetic behavior, and their negative Poisson’s ratio effect can be maintained even at large strains (ε ∼ 0.1). Poisson’s ratio can be regulated by adjusting the value of the geometry parameters of the graphene sheets (GSs), which comprise the PRGNs, and changed from negative to positive and from positive to negative. Also, the influences of the structural size of GSs and the connection angle between GSs on the mechanical properties are explored, which will provide a theoretical basis for the preparation and performance optimization of GSs and the nano-auxetic properties of materials.
46
Md Ali, Afifah, Mohd Zaidi Omar, Hanizam Hashim, Mohd Shukor Salleh, and Intan Fadhlina Mohamed. "Recent development in graphene-reinforced aluminium matrix composite: A review." REVIEWS ON ADVANCED MATERIALS SCIENCE 60, no. 1 (January 1, 2021): 801–17. http://dx.doi.org/10.1515/rams-2021-0062.
Повний текст джерелаАнотація:
Abstract Considerable attention has been given to graphene as a reinforcement material for metal matrix composite (MMC) because of its great potential for use in the automotive and aerospace industry. In general, the difficulty in achieving optimally improved properties can be attributed to poor wettability, agglomerations, and non-uniform distribution of reinforcement in the MMCs. Therefore, in terms of structural integrity, interfacial bonding, and its strengthening mechanism are important to achieve a high performance composite, which makes it imperative to discuss the integration of graphene into the alloy. The reinforcement mechanism of graphene-reinforced aluminium alloy has been evaluated in a limited number of studies, and this article examines current publications in this area. This article outlines three key topics related to the key challenges of graphene as a reinforcement material, the strengthening mechanism of graphene in a metal matrix, and the factors limiting the properties enhancement. Lastly, future works and recommendations addressed are summarized. The review presented aims to benefit to a wide range of industries and researchers and serve as a resource for future scholars.
47
Duque, Maria Eduarda Martins, and Emerson Sarmento Gonçalves. "Interference of Graphene Presence in Formation Mechanism of Metalloporphyrin (PtTFPP) Complex with Oxygen." ECS Meeting Abstracts MA2022-02, no. 64 (October 9, 2022): 2399. http://dx.doi.org/10.1149/ma2022-02642399mtgabs.
Повний текст джерелаАнотація:
Introduction Pressure sensitive Paints (PSP) are widely applied in aerodynamic surface tests, as they allow fast data acquisition and pressure mapping across the entire surface during flight simulation [1]. The PSP used in this work is mainly composed of Fluoro-Isopropyl-Butyl (FIB) (Figure 1.A), a polymer that allows oxygen permeability in the paint and platinum tetra(pentafluorophenyl)porphyrin (PtTFPP), responsible for pressure sensitivity (Figure 1.B) [2]. Considering the PSP unique properties, it is possible to obtain an electrical response that enables the use of this paint in airplanes pressure sensors, during flight. For this, an electrical charge of graphene derivative is added to the PSP. Graphene has properties that make it interesting for several applications. Its final application is related to its production method. Electrochemical exfoliation of graphite was used to produce the carbonaceous electrical charge, which has advantages such as ecofriendly reagents, simple product purification and ease of subsequent steps [3, 4]. Seeking to reach the PSP application potential as an oxygen sensitive material that generates an electrical response on pressure, it is necessary that the added electrical charge is compatible with the paint, producing a homogeneous material, high electrical conductivity and mechanical properties suitable for aerospace applications. Thus, the interaction of graphene derivatives with paint and how this influence on its sensitivity to oxygen was studied. This sensitive material can be used in an aeronautical sensor redundant to the Pitot Tube. Therefore, the main objective of the proposed research is to increase the safety of air navigation using a graphene-derived composite with a pressure-sensitive metalloporphyrin paint (PSP). Materials and methods Initially, the production of graphene derivatives was carried out by electrochemical exfoliation of graphite, in which plates of thin graphite sheets pressed were used as working electrode and counter electrode. As an electrolyte solution, a mixture of salts (NH4)2SO4 and (NH4)2HPO4 was used at a concentration of 0.1 mol.L-1 and a proportion of 70/30 v/v%. Exfoliation took place at a fixed potential of 10 V, applied by an electrical power supply. At the end of this process, two drying methodologies were tested: kiln at 70°C (Graphene A) and lyophilization (Graphene B). The composite production consists of mixing the graphene derivative and PSP, at a concentration of 1 mg.mL-1, with the aid of an ultrasound tip for 30 minutes. In addition to the carbonaceous material, a commercial graphene (Graphene C) was also used. After mixing, the material is dripped onto an aluminum surface. The characterizations performed were Raman Spectroscopy and X-Ray Diffraction Spectroscopy to analyze the morphology of the graphene used and Stereo Microscopy, XRD and electrical impedance for the composites. Results and discussion Analyzing the Raman spectra, Graphene A has a more disorder in the carbon chain, higher degree of stacking between planes and a greater association of defects (D4, 2D1 bands, respectively). The lyophilized material showed less interactions between the edges (D1+D4 band) configuring smaller and less agglomerated particles. Graphene C also showed a certain degree of defects and functionalization by oxygenated groups. The diffractogram of Graphene B and C indicates greater disorder in the bonds of the carbon rings with sp2 hybridization than that presented in Graphene A, with A being the material with the highest number of layers and the smallest lamellar distance. Stereo microscopy (Figure 2) images of the composites showed that the mixture is not homogeneous, especially after drying and presents roughness, being these characteristics that can be a problem for the final application. The composite diffractograms show the same peaks only for the paint, with a difference in intensity. The amorphous peak at 16.4°, referring to the polymer, becomes more intense and crystalline with Graphene A and C indicating possible interaction and intercalation of graphene layers with the polymer. The Electrical Impedance of the composites was performed in variable vacuum without flow. Composites with Graphene A and B are resistive, without variation in the presence of different amounts of oxygen. With Graphene C, the response was capacitive-resistive, and was sensitive to pressure changes, but still needs calibration (Figure 3). [1] PUKLIN, E. et al. Ideality of pressure-sensitive paint. I. Platinum tetra(pentafluorophenyl)porphine in fluoroacrylic polymer. Journal of Applied Polymer Science, v. 77, n. 13, p.2795-2804, 2000. [2] GAMAL, E.; et. al. Oxygen pressure measurement using singlet oxygen emission. Review of Scientific Instruments 76, 054101, 2005. [3] KARIMOV, K. S.; et. al. Development of pressure-sensitive thermo-electric cell using graphene and n-Bi2Te3. Emergent Materials 2, pages 387–390, 2019. [4] ANJU, M.; et. al. Graphene-dye hybrid optical sensors. Vol 17, 194 – 217, 2019. Figure 1
48
Alfe, M., V. Gargiulo, and R. Di Capua. "An Old but Lively Nanomaterial: Exploiting Carbon Black for the Synthesis of Advanced Materials." Eurasian Chemico-Technological Journal 21, no. 3 (September 30, 2019): 203. http://dx.doi.org/10.18321/ectj861.
Повний текст джерелаАнотація:
Carbon black (CB) is an old-concept but versatile carbonaceous material prone to be structurally and chemically modified under quite mild wet conditions. Recently, we exploited the potentiality of CB for the production of a highly varied array of advanced materials with applications in energetics, water remediation and sensoristic. The proposed approaches are devised to meet specific needs: low production costs, scalable synthetic approaches, flexibility i.e. easy tuning of chemico-physical properties of the carbon-based advanced materials. Two main approaches have been exploited: modification of CB at the surface and highly CB de-structuration. The former approach allows obtaining highly homogenous CB-modified nanoparticles (around 160 nm) with tunable surface properties (hydrophilicity, typology of functional groups and surface charge density, pore size distribution), supports for ionic liquid (SILP) and composites (carbon-iron oxide). The latter approach exploiting a top-down demolition of CB produces a highly versatile graphene related material (GRM), made up by stacked short graphene-like layers (GL) particularly suitable for advanced composites synthesis and ultrathin carbon-based films production.
49
Malanagahalli, Sowmya, Diane Murera, Cristina Martín, Hazel Lin, Nadége Wadier, Hélène Dumortier, Ester Vázquez, and Alberto Bianco. "Few Layer Graphene Does Not Affect Cellular Homeostasis of Mouse Macrophages." Nanomaterials 10, no. 2 (January 28, 2020): 228. http://dx.doi.org/10.3390/nano10020228.
Повний текст джерелаАнотація:
Graphene-related materials (GRMs) are widely used in various applications due to their unique properties. A growing number of reports describe the impact of different carbon nanomaterials, including graphene oxide (GO), reduced GO (rGO), and carbon nanotubes (CNT), on immune cells, but there is still a very limited number of studies on graphene. In this work, we investigated the biological responses of few layer graphene (FLG) on mouse macrophages (bone marrow derived macrophages, BMDMs), which are part of the first line of defense in innate immunity. In particular, our paper describes our findings of short-term FLG treatment in BMDMs with a focus on observing material internalization and changes in general cell morphology. Subsequent investigation of cytotoxicity parameters showed that increasing doses of FLG did not hamper the viability of cells and did not trigger inflammatory responses. Basal level induced autophagic activity sufficed to maintain the cellular homeostasis of FLG treated cells. Our results shed light on the impact of FLG on primary macrophages and show that FLG does not elicit immunological responses leading to cell death.
50
Cordaro, Annalaura, Giulia Neri, Maria Teresa Sciortino, Angela Scala, and Anna Piperno. "Graphene-Based Strategies in Liquid Biopsy and in Viral Diseases Diagnosis." Nanomaterials 10, no. 6 (May 26, 2020): 1014. http://dx.doi.org/10.3390/nano10061014.
Повний текст джерелаАнотація:
Graphene-based materials are intriguing nanomaterials with applications ranging from nanotechnology-related devices to drug delivery systems and biosensing. Multifunctional graphene platforms were proposed for the detection of several typical biomarkers (i.e., circulating tumor cells, exosomes, circulating nucleic acids, etc.) in liquid biopsy, and numerous methods, including optical, electrochemical, surface-enhanced Raman scattering (SERS), etc., have been developed for their detection. Due to the massive advancements in biology, material chemistry, and analytical technology, it is necessary to review the progress in this field from both medical and chemical sides. Liquid biopsy is considered a revolutionary technique that is opening unexpected perspectives in the early diagnosis and, in therapy monitoring, severe diseases, including cancer, metabolic syndrome, autoimmune, and neurodegenerative disorders. Although nanotechnology based on graphene has been poorly applied for the rapid diagnosis of viral diseases, the extraordinary properties of graphene (i.e., high electronic conductivity, large specific area, and surface functionalization) can be also exploited for the diagnosis of emerging viral diseases, such as the coronavirus disease 2019 (COVID-19). This review aimed to provide a comprehensive and in-depth summarization of the contribution of graphene-based nanomaterials in liquid biopsy, discussing the remaining challenges and the future trend; moreover, the paper gave the first look at the potentiality of graphene in COVID-19 diagnosis.