Thematische Bibliographien / Advanced nanomaterials

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Auswahl der wissenschaftlichen Literatur zum Thema „Advanced nanomaterials“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 10. Februar 2022

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Zeitschriftenartikel zum Thema "Advanced nanomaterials"

Titus, Elby, João Ventura, João Pedro Araújo und João Campos Gil. „Advanced nanomaterials“. Applied Surface Science 424 (Dezember 2017): 1. http://dx.doi.org/10.1016/j.apsusc.2017.05.104.

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Park, Sehyun, Hojoong Kim, Jong-Hoon Kim und Woon-Hong Yeo. „Advanced Nanomaterials, Printing Processes, and Applications for Flexible Hybrid Electronics“. Materials 13, Nr. 16 (13.08.2020): 3587. http://dx.doi.org/10.3390/ma13163587.

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Recent advances in nanomaterial preparation and printing technologies provide unique opportunities to develop flexible hybrid electronics (FHE) for various healthcare applications. Unlike the costly, multi-step, and error-prone cleanroom-based nano-microfabrication, the printing of nanomaterials offers advantages, including cost-effectiveness, high-throughput, reliability, and scalability. Here, this review summarizes the most up-to-date nanomaterials, methods of nanomaterial printing, and system integrations to fabricate advanced FHE in wearable and implantable applications. Detailed strategies to enhance the resolution, uniformity, flexibility, and durability of nanomaterial printing are summarized. We discuss the sensitivity, functionality, and performance of recently reported printed electronics with application areas in wearable sensors, prosthetics, and health monitoring implantable systems. Collectively, the main contribution of this paper is in the summary of the essential requirements of material properties, mechanisms for printed sensors, and electronics.

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Taubert, Andreas, Fabrice Leroux, Pierre Rabu und Verónica de Zea Bermudez. „Advanced hybrid nanomaterials“. Beilstein Journal of Nanotechnology 10 (20.12.2019): 2563–67. http://dx.doi.org/10.3762/bjnano.10.247.

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Titus, Elby, João Campos Gil, João Ventura und João Pedro Araújo. „Preface: Advanced Nanomaterials“. Journal of Applied Physics 120, Nr. 5 (07.08.2016): 051601. http://dx.doi.org/10.1063/1.4960078.

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Tiwari, Ashutosh. „Advanced Nanomaterials - Recent Developments“. Advanced Materials Letters 7, Nr. 11 (01.11.2016): 851. http://dx.doi.org/10.5185/amlett.2016.11001.

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Tanaka, Takaho, und Konstantin Iakoubovskii. „Focus on Advanced Nanomaterials“. Science and Technology of Advanced Materials 11, Nr. 5 (Oktober 2010): 050201. http://dx.doi.org/10.1088/1468-6996/11/5/050201.

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Eftekhari, Aziz, Solmaz Maleki Dizaj, Elham Ahmadian, Agata Przekora, Seyed Mahdi Hosseiniyan Khatibi, Mohammadreza Ardalan, Sepideh Zununi Vahed et al. „Application of Advanced Nanomaterials for Kidney Failure Treatment and Regeneration“. Materials 14, Nr. 11 (29.05.2021): 2939. http://dx.doi.org/10.3390/ma14112939.

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The implementation of nanomedicine not only provides enhanced drug solubility and reduced off-target adverse effects, but also offers novel theranostic approaches in clinical practice. The increasing number of studies on the application of nanomaterials in kidney therapies has provided hope in a more efficient strategy for the treatment of renal diseases. The combination of biotechnology, material science and nanotechnology has rapidly gained momentum in the realm of therapeutic medicine. The establishment of the bedrock of this emerging field has been initiated and an exponential progress is observed which might significantly improve the quality of human life. In this context, several approaches based on nanomaterials have been applied in the treatment and regeneration of renal tissue. The presented review article in detail describes novel strategies for renal failure treatment with the use of various nanomaterials (including carbon nanotubes, nanofibrous membranes), mesenchymal stem cells-derived nanovesicles, and nanomaterial-based adsorbents and membranes that are used in wearable blood purification systems and synthetic kidneys.

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Ahmed, Faheem, Ameer Azam, Mohammad Mansoob Khan und Samuel M. Mugo. „Advanced Nanomaterials for Biological Applications“. Journal of Nanomaterials 2018 (29.08.2018): 1–2. http://dx.doi.org/10.1155/2018/3692420.

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Huang, Haoyuan, und Jonathan F. Lovell. „Advanced Functional Nanomaterials for Theranostics“. Advanced Functional Materials 27, Nr. 2 (07.11.2016): 1603524. http://dx.doi.org/10.1002/adfm.201603524.

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Pham, Thanh-Dong, Nguyen Van Noi, Ajit Kumar Sharma und Van-Duong Dao. „Advanced Nanomaterials for Green Growth“. Journal of Chemistry 2020 (16.03.2020): 1–2. http://dx.doi.org/10.1155/2020/9567121.

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Dissertationen zum Thema "Advanced nanomaterials"

Tsikourkitoudi, Vasiliki P. „Development of advanced nanomaterials for lithium-ion batteries“. Thesis, Kingston University, 2016. http://eprints.kingston.ac.uk/37347/.

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The scope of the present study was to demonstrate the capability of Flame Spray Pyrolysis (FSP) process as a unique facility for the one-step synthesis of lithium titanate (Li[sub]4Ti[sub]5O[sub]12, LTO) nanoparticles with tailored properties. FSP offers a versatile technology to produce a wide range of high-purity oxide nanoparticles with desired properties. The ability of FSP to manipulate nanoparticles' properties was demonstrated by controlling operating conditions and selecting appropriate precursors. More precisely, the effect of FSP processing conditions on LTO properties were thoroughly investigated both experimentally in a pilot-scale reactor (production rates up to 1 kg h[sup]-1) and theoretically by the development of models describing particle dynamics in the spray flame. The main aim was to obtain LTO nanoparticles of different particle sizes. The produced nanoparticles were used as active materials for the fabrication of lithium-ion battery anodes and electrochemical characterisation was performed in order to examine the influence of the particles' physical properties on the battery performance. The control of the flame synthesis parameters is crucial, since the properties of the final product depend on the nanoparticles' size distribution, morphology, extent of agglomeration, as well as phase compostition. Initially, the influence of liquid feed properties (precursor concentration and solvent) on LTO physical properties was established. LTO particle size increazsed when the precursor concentration was increased due to particle concentration increase in the flame followed by the enhancement of particle collisions and hence particle growth. Moreover, high precursor concentration caused a variation of physical properties of the precursor mixture, affecting the atomisation process, and subsequently led to the formation of larger droplets. Larger droplets generated larger particle. Additionally, the choice of solvent for the dissolution of metal precursors was proven to be an important issue for LTO synthesis by FSP. The physical properties of the solvents in relation to metal precursor properties affected the formation of LTO nanoparticles. Inhomogenous particle size distribution was observed for LTO synthesised by a precursor mixture containing isopropanoil, due to its low boiling point inducing particle formation via droplet-to-particle mechanism, whereas pure 2-ethylhexanoic acid was used, LTO particles were formed by gas-to-particle route and had homogenous size distribution. The droplets generated during atomisation by the precursor solution of pure 2- ethylhexanoic acid had the largest diameter due to the high viscosity and density of the mixture. Despite this, the obtained nanoparticles were the smallest in comparison to those obtained from other precursor solutions. In such cases, the boiling point and specific combustion enthalpy of the solvents should be taken into consideration. Apart from the liquid feed properties, the effect of FSP operating conditions (O[sub]2 dispersion gas and precursor flow rate) were also investigated in the present study. By increasing the O[sub]2 dispersion gas rate, LTO nanoparticles' diameter was decreased due to a decrease of the droplet diameter. Particle sintering was also prevented due to the faster transport of primary particles through a shorter flame. An increase of the precursor flow rate at first increased and then decreased the LTO nanoparticles' size. The initial increase of particle size occurred due to a flame temperature increase. At higher precursor flow rates, the droplets disintegrated and generated many smaller fragmented droplets due to higher temperature, which subsequently formed smaller particles. Moreover, particle growth in the spray flames was studied theoretically, and numerical models were developed. The monodisperse model developed assumed that all primary particles had the same size. However, it overestimated the primary particle diameter values. Polydispersity was taken into consideration in the development of an additional model which was solved by the quadrature method of moments. The results obtained from the polydisperse model were closer to the experimental values, both for low and high production rates. Finally, the synthesised LTO nanoparticles were used as active materials in lithium-ion battery half cells and their electrochemical behaviour was elucidated, demonstrating the effect of the particles' physical properties on their electrochemical performance. LTO of particle size 18 and 21 nm showed the best electrochemical performance with capacity retention of almost 100% after 500 cycles, whereas the smallest particle deteriorated the electrochemical performance with a capacity loss of more than 60%.

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Zamani, Reza. „Structure nanoengineering of functional nanomaterials. Advanced electron microscopy study“. Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/145318.

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In this report novel materials for advanced applications are studied by means of the latest microscopy technologies and methodologies which have had a dramatic impact on progress of materials science. The aim was to study phenomena such as polytypism, unusual morphologies, polytypic branching, cation ordering, polarity, epitaxial growth and interface, etc, in order to find adequate explanations for the influence of the phenomena on the properties and applications such as thermoelectricity, p-n junction functionality, photovoltaic efficiency, optoelectronic properties, and sensing response. Various semiconducting materials, i.e. complex chalcogenides, metal oxides, and III-V nanostructures were characterized for this purpose. Here, nanoengineered structures of functional materials at nanoscale are studied by means of advanced electron microscopy methods. Chapter 1 gives a brief introduction to the report; the main purpose of the work, state-of-the-art, challenges and possibilities. In chapter 2 the methodology is described. The results are provided in Chapter 3, 4, and 5, and Chapter 6 is the general conclusions and the outlook. Note that Chapters 3-5 have their own introduction and conclusion. Therefore, chapter 1 consists of a short introduction to the general idea of the study, its importance and the state-of-the-art, and a preface of the thesis. In Chapter 2, after a brief history and the basic concepts of EM, the TEM methodology is described; the advanced TEM techniques used to study the nanostructured semiconductors at atomic scale. In general, it consists of brief descriptions of basic principles of TEM techniques. As experimental results are corroborated by theoretical studies and simulations, these procedures (image processing, simulations, etc) are also described shortly. Chapter 3 is dedicated to nanoengineering crystal structure and morphology of nanocrystals of complex copper-based chalcogenide, from binaries to complex ternaries and quaternaries. In this chapter it is shown that there is a wide range of possibilities for engineering, as many elements can be substituted with the primary cations and anions. Advanced TEM studies are performed in order to figure out the physics behind the property modifications. Phenomena such as morphology change, polytypism, ordering, polarity, electronic band change, strain, etc are elaborately studied, and correlated to the physical properties such as thermoelectricity. CCTSe polypods are the case of a complete structure study to understand the branching mechanism. Therefore, by means of an aberration-corrected TEM the polarity and cation ordering was determined. Polarity-driven morphology and branching mechanism is explained. Moreover, electronic band structure in this polytypic structure is simulated. Chapter 4 is based on the study of nanojunctions in metal oxide heterostructured NWs, structures that can enhance the functionality of the targeted devices, such as photovoltaic cells, or gas sensors. Production of nanojunctions is a successful approach in the context. In this chapter it is shown how coaxial heterostructuring of NWs, e.g. formation of core-shell structures increase the efficiency of the solar cells or enhance the sensitivity/selectivity of the gas sensors. In chapter 5 almost the same approach was followed, nevertheless, this time with III-V NWs. The importance of axial heterostructures and fully-epitaxial and relaxed structure are emphasized. The optoelectronic properties of the GaN NWs, such promising p-n junctions, are examined. Polarity issue, as a remarkably influencing parameter, is precisely studied experimentally. Its effect on electronic band structure in the heterointerface is also proven by the theoretical simulations. In the end, a general conclusion of the whole work and room for further study and future work is discussed in Chapter 6. The ample freedom of structural nanoengineering in the materials, together with development of novel electron microscopy techniques, opens the way towards the new possibilities for the future work.
En este trabajo hemos estudiado materiales avanzados con las últimas tecnologías y metodologías de microscopía electrónica, las que tienen un impacto importante en el desarrollo de la ciencia de materiales. El objetivo principal ha sido estudiar fenómenos como el politipismo, morfologías inusuales, ramificación, ‘ramificación politípica’, manipulación de la estructura de banda, ordenación de los cationes, polaridad, crecimiento e interfase epitaxial, alojamiento de una fase secundaria en una base, etc. para razonar la influencia de aquellos fenómenos en las propiedades y aplicaciones, por ejemplo la termoelectricidad, el funcionamiento de unión p-n, la eficiencia de las celdas solares, las propiedades optoelectrónicas, la respuesta de los sensores, etc. Distintos semiconductores han sido caracterizados: nanopartículas de calcogenuros complejos, nanohilos de óxidos de metales, y nanohilos del grupo III-V. Hemos estudiado los materiales en escala nanométrica por medio de métodos avanzados de microscopía electrónica de transmisión (TEM). El capítulo 1 es una breve introducción a la tesis, en la que se exponen los objetivos principales del trabajo, los últimos avances (state-of-the-art), los retos, y las nuevas posibilidades. En el capítulo 2 se explica la metodología de TEM utilizada para estudiar los semiconductores. Los capítulos 3 a 5 se componen de los resultados. El capítulo 3 está basado en el análisis de las nanopartículas de calcogenuros complejos. La sección de resultados contiene tres partes: monoestructurados, multiestructurados, y heteroestructuradas de tipo core-shell. En caso de nanopartículas cuaternarias de CCTSe, las nanopartículas ramifican y forman polipodes, que es el caso de un estudio elaborado porque el mecanismo de la ramificación es interesante. En capítulo 4 se trabaja con los nanohilos de óxidos de metales que sirven para muchas aplicaciones como celdas solares o sensores de gas. En nuestro caso, con el objetivo de mejorar la funcionalidad de los aparatos, hemos estudiado heteroestructuras. En el capítulo 5 prácticamente la misma aproximación está escogida, pero esta vez con nanohilos del grupo III-V. Aquí hemos enfatizado la importancia del crecimiento epitaxial de heteroestructuras. Por último, en el capítulo 6 hemos hablado de las conclusiones generales y las perspectivas para la investigación futura.

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Russo, Lorenzo. „Designing advanced nanomaterials for next generation in vitro diagnostics: development of optical and electrochemical biosensors for determination of viral and bacterial infections based on hollow AuAg nanoparticles“. Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/666751.

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En esta tesis doctoral. El dibujo racional de nanomateriales avanzados con propiedades controladas se aplicó para su empleo en biosensing, y condujo al desarrollo de dos plataformas diagnosticas para la determinación de infecciones virales y bacterianas. Primero, se desarrolló un método sintético altamente reproducible y robusto para la producción de nanoshells de una aleación AuAg monodispersas basado en remplazamiento galvánico. El protocolo descrito permite el controlo preciso sobre la morfología de las partículas, en términos de grosor de la capa externa y de tamaño del vacío interior, la composición relativa y distribución topológica de los metales noble constituyentes, y su rugosidad y porosidad superficial. Esta predictibilidad sintética, testeada sobre un rango de tamaños, se ha conseguido a través de un estudio sistemático de la relación entre de cada reactivo, juntos a una detallada caracterización de la composición y estructura del material con diferentes técnicas. Además, el análisis de las propiedades plasmonicas de las NSs de AuAg durante su transformación estructural, que se extiende por casi todo el espectro visible hasta las longitudes de ondas del Near-Infrared, reveló una dependencia estricta con sus características morfológicas y composicionales. Estos resultados, también confirmados con cálculos basados en la teoría de Mie, proveyeron la base para su aplicación como amplificadores de señal en un immunoensayo basado en SERS. Segundo, por la primera vez el comportamiento electroquímico de las NSs de AuAg fe reportado. Causado por la corrosión controlada de átomos de Ag contenidos en los núcleos residuales de las partículas y las capas finas de aleación, el estudio voltametrico de estos nanocristales vacíos se reveló fuertemente dependiente de su composición elemental relativa y, parcialmente, de su tamaño y morfología. Un efecto electrocatalitico peculiar apareció solamente para NSs de AuAg con un ratio Au/Ag suficiente para permitir la electrodeposición catalítica de Ag+ encima de la superficie de las partículas a potenciales menos negativos que el potencial de redacción estándar de Ag. Este comportamiento no previamente reportado está causado solo por el carácter levemente oxidante del electrolito utilizado, sin la necesidad de ningún otro co-reactivo u oxidante. Estos resultados constituyeron la base racional para desarrollar NSs de AuAg con propiedades desiderables para su aplicación en el ensayo electroquímico descrito. Aventajándose de las propiedades plasmonicas de las NSs de AuAg, el desarrollo de un ensayo immunocromatografico basad ene SERS para la detección sensible y cuantitativa de MxA, un biomarcador comúnmente asociado a infecciones virales, fue realizado. Gracias a las intensidades plasmonicas amplificadas enseñadas por las NSs de AuAg, resultante por el efecto de cavidad plasmonica comúnmente observado in nanoestructuras vacias, su superifices se portan como un continuo hot-spot, amplificando cualquier señal Raman emitido por reporters inmovilizados encima. Además, la posibilidad de ajustar precisamente la longitud máxima de LSPR de las NSs de AuAg de manera de coincidir con el láser NIR durante la mesura SERS permitió de mejorar la performance analítica. Entonces, las NSs de AuAg fueron fácilmente conjugadas con anticuerpos anti-MxA e integrados en un ensayo immunocromatografico para revelar su presencia en muestras de suero. Después de atenta optimización de los parámetros de la plataforma point-of-care, al proteína MxA pudo ser detectada a un limite de detección de pocos ng/mL. En fin, la capacidad de modular precisamente la composición elemental de las NSs de AuAg portó al diseño de un ensayo electroquímico para la detección rápida de dos bacterias modelos, Escherichia coli and Salmonella typhimurium. Las NSs de AuAg se utilizaron como reporters electroquímicos por la facilidad de generar la señal electroquímica, causada solamente por el carácter levemente oxidante de la matriz biológica. Por otro lado, el recubrimiento polimérico de las partículas confirió la interacción non específica basada en afinidad con las células bacterianas en solución, evitando de necesitar anticuerpos caros y frágiles. A través de esta estrategia de bajo coste, E.coli puso ser detectado en PBS a concentraciones de 102 CFU/mL, mientras también se consiguió la discriminación semi-selectiva de los perfiles corriente-concentración de las dos bacterias modelos.
In this PhD thesis, the rational design of advanced nanomaterials with controlled properties was applied for their employment in biosensing, leading to the development of two diagnostic platforms for the determination of viral and bacterial infections. Firstly, a highly reproducible and robust synthetic method for the production of monodisperse AuAg alloy NSs based on GRR was developed. The protocol described allows the precise control over the particles’ morphology, in terms of shell thicknesses and void sizes, the relative composition and topological distribution of their constituting noble metals, as well as their surface roughness and porosity. This synthetic predictability, tested over a range of sizes, has been achieved through a systematic study of the convoluted interplay of each co-reagent, together with a detailed characterization of the material’s composition and structure through an array of techniques. Moreover, the analysis of AuAg NSs’ plasmonic properties evolution during their structural transformation, which spanned through almost the whole visible spectrum up to NIR wavelengths, revealed a tight dependence with their morphological and compositional features. These results, also confirmed by calculations based on Mie’s theory, provided the basis for their application as signal enhancers in the SERS-based LFA developed. Secondly, for the first time the electrochemical behavior of AuAg NSs was reported. Triggered by the controlled corrosion of Ag atoms contained in the particles’ residual cores and thin alloy shells, the voltammetric study of these hollow nanocrystals has been found to be strongly dependent on their relative elemental composition and, partially, to their size and morphology. Indeed, a peculiar electrocatalytic effect appeared only for AuAg NSs possessing a high-enough Au/Ag ratio to let the catalytic electrodeposition of Ag+ on the NSs’ surfaces occur at potentials less negative than Ag standard reduction one. Interestingly, this unreported feature was shown to be triggered only by the mild oxidating character of the electrolyte used, without the need of any other co-reagent or oxidizer. These findings constituted the rational basis for developing AuAg NSs with desirable properties to be applied in the electrochemical assay described. Taking advantage of the tunable plasmonic properties of AuAg NSs, the development of a SERS-based LFA for the sensitive and quantitative detection of MxA, a biomarker commonly associated to viral infections, was achieved. Thanks to the enhanced plasmons intensities displayed by AuAg NSs, resulting from the plasmonic cavity effect commonly observed in hollow nanostructures, their surfaces acted as a continuous hot-spot, amplifying any Raman signal emitted by the reporters thereby attached. Moreover, the possibility to precisely adjust AuAg NSs’ LSPR maximum wavelength to match the NIR excitation laser used during SERS measurements allowed to further improve the overall analytical performance. Thus, AuAg NSs were easily conjugated with anti-MxA antibodies and integrated in a LFA in order to reveal its presence in spiked serum samples. After careful optimization of the point-of-care platform parameters, MxA protein could be successfully detected down to the analytically-relevant LOD of few ng/mL. Finally, the capability to precisely modulate AuAg NSs elemental composition lead to the design of a proof-of-concept electrochemical assay for the rapid detection of two model bacterial strains, Escherichia coli and Salmonella typhimurium. AuAg NSs were used as electrochemical reporters because of the ease of generation of the electrochemical signal, triggered by the sole mild oxidating character of the biological sample matrix. Besides, the polymeric coating of the hollow particles provided the non-specific, affinity-based interaction with bacterial cells in solution, avoiding the need for costly and fragile antibodies. With this low-cost strategy, E.coli could be detected in PBS down to 102 CFU/mL, while the semi-selective discrimination of the current-concentration profiles of the two model bacterial strains was also achieved.

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Lin, Yan. „Advanced nanomaterials for fuel cell catalysts characterization of bimetallic nanoparticles /“. Diss., Online access via UMI:, 2006.

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Shmeliov, Aleksey. „Transmission electron imaging and diffraction characterisation of 2D nanomaterials“. Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:4bc4d60f-4db0-43d2-9119-cb0a0366090e.

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Following the discovery of graphene, 2D nanostructures have been noted for their potential in a range of high-impact applications, such as sensing, catalysis, and composite reinforcement. Liquid-phase exfoliation and chemical vapour deposition have been demonstrated and indicate the feasibility of mass-scale production. With the advent of mass-produced 2D nanostructures a key focus of research is to characterise these materials. This thesis is concerned with imaging and structural properties of the 2D nanomaterials, hexagonal boron nitride (h-BN), molybdenum disulfide (MoS₂), tungsten disulfide (WS₂), titanium disulfide (TiS₂) and hexabenzocoronene (HBC), produced via liquid phase exfoliation. HBC strictly speaking is not 2D nanomaterial, however, it can be viewed as transition molecule from benzene to graphene. The data used for characterisation is based primarily on electron diffraction and, in particular, aberration corrected annular dark field (ADF) scanning transmission electron microscopy (STEM). The incoherent nature of ADF STEM provides direct atomic imaging without the contrast reversals upon focus changes seen in conventional high-resolution transmission electron microscopy (HRTEM). The main structural feature investigated in this thesis was the stacking sequences in few-layers h-BN, MoS₂, WS₂ and TiS₂. Simple stacking (AAA) can be distinguished from Bernal (ABA) and rhombohedral (ABC) on the basis of intensity ratio, I_{10̅10}/I_{11̅20} , in diffraction patterns and indirectly in HRTEM images. Nonetheless acquisition of the diffraction patterns suitable for analysis can be challenging due to the sample issues. Non-bulk stacking sequences were reliably confirmed for all above 2D nanomaterials on the basis of atomically resolved ADF STEM. 20 h-BN, 28 MoS₂, 5 WS₂ and 6 TiS₂ nanoflakes were imaged and analysed. Amongst them 2 h-BN, 9 MoS2, 4 WS2 and 1 TiS2 nanoflakes displayed non-bulk stacking. Hence, it appears that 2D WS2 has the greatest affinity for non-bulk stacking. Finally, an interesting structural transformation was observed in HBC molecules. Under the influence of electron beam HBC agglomerates were transformed into crystalline phase with 90^o symmetry.

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Liu, Kewei. „FABRICATION OF STRUCTURED POLYMER AND NANOMATERIALS FOR ADVANCED ENERGY STORAGE AND CONVERSION“. University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1542022285390711.

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Melinte, Georgian. „Advanced 3D and in-situ TEM approaches applied to carbon-based and zeolitic nanomaterials“. Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAE009/document.

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Dans le cadre de cette thèse, des techniques avancées de Microscopie électronique à transmission (MET)ont été utilisées dans le but de caractériser et de fabriquer de nouveaux nanomatériaux pour des applications dans les domaines de la nanoélectronique et de la catalyse. Trois types de matériaux fonctionnalisés sont étudiés: le graphène multifeuillets (FLG– Few-Layer Graphene) avec des nanomotifs,des nanotubes de carbone (CNTs - Carbon Nanotubes en anglais) et des zéolithes mésoporeux. La formation de nanomotifs de tranchées et de tunnels sur des flocons de FLG à l’aide de nanoparticules(NPs) de fer est étudiée dans une approche qui combine la tomographie électronique et la MET environnementale. Le rôle des facettes de la nanoparticule et des paramètres topographiques de FLG a été déterminé du point de vue quantitatif, ce qui a mené à la mise en évidence du mécanisme de formation des nanomotifs de tranchées et de tunnels. Le transfert de nanoparticules à base de métal entre deux nanostructures de carbone a été également étudié, en temps réel, en employant un porte-échantillon MET couplé avec un dispositif STM (Scanning Tunneling Microscope en anglais). Le protocole de contrôle du transfert des nanoparticules, les transformations chimiques et structurales subies par celles-ci, le mécanisme de croissance de nouvelles nanoparticules et d’autres phénomènes liés à ces effets ont été étudiés avec attention. La dernière partie de la thèse est centrée sur l’étude de la tomographie électronique à faible dose de la porosité induite dans deux classes de zéolithes, ZSM-5 et zéolithe Y, en utilisant un traitement chimique novateur à base de fluor
In this thesis, advanced Transmission Electron Microscopy (TEM) techniques are used to characterize and fabricate new nanomaterials with applications in nanoelectronics and catalysis. Three types of functionalized materials are investigated: nanopatterned few-layer graphene (FLG), carbon nanotubes(CNTs) and mesoporous zeolites. The nanopatterning process of FLG flakes by iron nanoparticles (NPs) is studied using an approach combining electron tomography (ET) and environmental TEM. The role of the nanoparticle faceting and of the FLG topographic parameters has been quantitatively determined leading to the first determination of the operating mechanism of the patterning process. The mass transfer of metallic-based NPs between two carbon nanostructures was studied as well in real-time by using a TEMSTMholder. The protocol of controlling the mass transfer, the chemical and structural transformations of the NPs, the growth mechanism of the new NPs and other related phenomena were carefully investigated.The last part deals with the low-dose ET investigation of the porosity induced in two classes of zeolites,ZSM-5 and zeolite Y, by an innovative fluoride-based chemical treatment

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Oben, Delphine. „Synthesis of advanced hybrid polymeric nanomaterials and characterization of novel silsesquioxanes with desirable superhydrophobic coating properties“. Thesis, Open University, 2016. http://oro.open.ac.uk/48062/.

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Understanding and controlling the hydrolysis and condensation of trialkoxy and tetraalkoxy silanes in acidic medium (Figure A) has not been fully realised. In this research study, both the understanding and control has been achieved using methods developed from the VitolaneTM process invented by TWI Ltd1 our industrial collaborators. The VitolaneTM process involves the synthesis of 3-methacryloxypropylsilsesquioxane resin from the hydrolytic condensation of 3-methacryloxy-propyltrimethoxysilane (MPTMS) in the presence of methanol, water and an acid catalyst (A-system). The reaction was repeated with two starting materials; 3-methacryloxy-propyltrimethoxysilane (MPTMS) and n-propyltrimethoxysilane (nPTMS) to form the AZ-system. It was found that with certain compositions, the reaction quickly reaches a pseudo equilibrium hence the hydrolysis rate constant could be determined. The instrumental analysis using Maldi-ToF-MS, HPLC, GPC, TGA, GCMS, DLS, DSC, FTIR and CHN analysis of both types of resins gave results that suggested the organic-inorganic hybrid silsesquioxanes obtained had the expected chemical composition and unique physical properties. This study was further extended to Stöber sphere silica nanoparticles aimed at extending our understanding from the above hydrolysis and condensation mechanistic study to the synthesis of Stöber silica nanoparticles 2 of various sizes (Figure B). The synthesis follows a similar pattern as the Vitolane™ process but using TEOS as starting material and ammonium hydroxide base instead of acid as in the original VitolaneTM process. The Stöber spheres study was carried out so we could add them to Vitolane in order to give rough (on the nanoscale) surfaces that would be superhydrophobic. The Stöber spheres were characterized using transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and dynamic light scattering (DLS) to investigate the particle size formation. The Stöber spheres obtained were of varied sizes depending upon the way they were prepared (Figure B).

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Wang, Weiliang. „Novel functional nano-coatings on glass by spray deposition“. Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:45bd0d35-111e-4855-96f1-edf109e65b7b.

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Nanocomposite thin films with gold nanoparticles embedded in a host metal oxide prepared by spray pyrolysis deposition have been investigated. A single-step process has been developed using a one-pot solution containing precursors for both gold nanoparticles and host metal oxides. The films obtained display combined features of colouration, electrical conductivity and solar control. In this study two precursors for gold nanoparticles were used: preformed gold colloids and HAuCl₄. Three metal oxide host materials, TiO₂, SnO₂ and ZnO, were investigated. These films were deposited at a substrate temperature of 200-600 °C. Powder X-ray diffraction analysis reveals the presence of metallic gold. SEM inspection typically showed particulate gold of 5-20 nm in diameter, distributed at the surface or within the host matrix. Optical spectroscopy showed an intense absorption in the visible region due to the characteristic surface plasmon resonance (SPR) effects of gold nanoparticles. The wavelength of the SPR peaks varies depending on the refractive index of surrounding host material which is significantly influenced by the substrate deposition temperature. On the other hand, SnO₂ and ZnO, together with the introduction of dopants, were further investigated as suitable materials for transparent conducting oxides (TCO). SnO₂:F films were found to attain very low electrical resistivity, while ZnO films exhibit higher transparency in the visible. A double layered structure with a TCO layer of SnO₂:F on top of a layer embedded with gold nanoparticles has been employed to achieve the combined functionalities of conductivity and colouration. The electrical conductivity is significantly enhanced compared to a nanocomposite single layer film due to the introduction of the TCO top layer. In this thesis, spray pyrolysis deposition has demonstrated a simple and rapid approach to the production of a variety of thin films. It can be immediately integrated with current industrial coating equipment and scaled up for large-scale production process.

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Searle, Andrew. „Application of nanostructured emitters for high efficiency lighting“. Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:81731b64-c40b-4c76-9c90-dae7c956e29f.

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This is the first study comparing morphologies of CNT films on Kanthal wire, with their field emission properties, and as such offers ways to design better cylindrical emitter devices. A low turn-on field was achieved (0.35 V/µm), the field emission results have been explained using a simple model, and a fluorescent lamp was fabricated. Whilst previous work has been done on the link between “as grown” CNT films and their respective field emission properties on flat substrates, very little work has been done on linking morphology to emission performance on wire substrates, where the morphology can be very different. Microscopic structures such as towers, ridges and clumps consisting of many aligned or entangled CNTs were grown using an aerosol chemical vapour deposition (a-CVD) technique. Hydrogen added to the carrier gas resulted in a decrease in defect density in the growth of undoped CNTs, and an increase in defect density in the growth of nitrogen doped CNTs (N-CNTs) and boron doped CNTs (BCNTs). In-situ transmission electron microscopy (TEM) studies show that damage to CNT tips results in a significantly higher turn-on field compared to undamaged tips. This can be recovered by making the CNT emit current for several minutes which makes the tip recrystallize due to heat caused by the Nottingham effect. The field emission properties of the “as grown” CNT films are dominated by protruding CNTs found at the edges of ridge and tower microscopic structures. The field emission properties are also related to the dimensions of these structures with the longest ridges (hence those with the longest protruding CNTs) resulting in the lowest turn-on electric field. The ridge and tower structures act to accommodate protruding CNTs at their edges and their physical dimensions (mainly width) act to separate these emitters so that screening is minimised. This work shows that efficient emitters can be fabricated effectively from simple a-CVD techniques and microscopic structures act to improve, not degrade, field emission properties.

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Bücher zum Thema "Advanced nanomaterials"

Nishide, Hiroyuki, und Kurt E. Geckeler. Advanced nanomaterials. Weinheim: Wiley-VCH, 2010.

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Hosseinkhani, Hossein. Nanomaterials in Advanced Medicine. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527818921.

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Giri, P. K., D. K. Goswami und A. Perumal, Hrsg. Advanced Nanomaterials and Nanotechnology. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-34216-5.

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Rahmandoust, Moones, und Majid R. Ayatollahi, Hrsg. Nanomaterials for Advanced Biological Applications. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10834-2.

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Gautam, Ravindra Kumar. Advanced Nanomaterials for Wastewater Remediation. Boca Raton : Taylor & Francis Group, a CRC title, part of the: CRC Press, 2016. http://dx.doi.org/10.1201/9781315368108.

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Onishi, Taku, Hrsg. Theoretical Chemistry for Advanced Nanomaterials. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0006-0.

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Bonča, Janez, und Sergei Kruchinin, Hrsg. Advanced Nanomaterials for Detection of CBRN. Dordrecht: Springer Netherlands, 2020. http://dx.doi.org/10.1007/978-94-024-2030-2.

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Lu, Wen, Jong-Beom Baek und Liming Dai, Hrsg. Carbon Nanomaterials for Advanced Energy Systems. Hoboken, NJ: John Wiley & Sons, Inc, 2015. http://dx.doi.org/10.1002/9781118980989.

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Ozoemena, Kenneth I., und Shaowei Chen, Hrsg. Nanomaterials in Advanced Batteries and Supercapacitors. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26082-2.

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Singh, Lakhveer, und Durga Madhab Mahapatra, Hrsg. Adapting 2D Nanomaterials for Advanced Applications. Washington, DC: American Chemical Society, 2020. http://dx.doi.org/10.1021/bk-2020-1353.

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Buchteile zum Thema "Advanced nanomaterials"

Fei, Dan, Songjun Li, Christian Cimorra und Yi Ge. „Advanced Nanoparticles in Medical Biosensors“. In Biosensor Nanomaterials, 37–55. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527635160.ch2.

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Boddeti, Govindh, Venu Reddy und B. S. Diwakar. „Nanomaterials for Advanced Microbiology“. In Nanotechnology for Advances in Medical Microbiology, 207–25. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9916-3_8.

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Choudhury, Soumyadip, und Manfred Stamm. „Hybrid Nanostructured Materials for Advanced Lithium Batteries“. In Hybrid Nanomaterials, 1–78. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119160380.ch1.

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Srivastava, Suneel Kumar, und Vikas Mittal. „Advanced Nanostructured Materials in Electromagnetic Interference Shielding“. In Hybrid Nanomaterials, 241–320. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119160380.ch5.

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Al-Khalaf, Alaa K. H., und Falah H. Hussein. „Green and Sustainable Advanced Nanomaterials“. In Green and Sustainable Advanced Materials, 93–106. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119407089.ch4.

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Fulekar, M. H., und Bhawana Pathak. „Advanced Instruments: Characterization of Nanomaterials“. In Environmental Nanotechnology, 193–224. Boca Raton : Taylor & Francis, CRC Press, 2018.: CRC Press, 2017. http://dx.doi.org/10.1201/9781315157214-8.

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Tahir, Muhammad Bilal, und Khalid Nadeem Riaz. „Hybrid Nanomaterials for Advanced Photocatalysis“. In Nanomaterials and Photocatalysis in Chemistry, 117–32. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0646-5_6.

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Wang, X. D., Z. L. Wang, H. J. Jiang, L. Zhu, C. P. Wong und J. E. Morris. „Nanomaterials and Nanopackaging“. In Materials for Advanced Packaging, 503–45. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-78219-5_15.

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Kralj, Anita Kovač. „Advanced Silver and Oxide Hybrids of Catalysts During Formaldehyde Production“. In Intelligent Nanomaterials, 91–106. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119242628.ch4.

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Figovsky, O., D. Beilin und N. Blank. „Advanced Material Nanotechnology in Israel“. In Nanomaterials: Risks and Benefits, 275–86. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-1-4020-9491-0_21.

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Konferenzberichte zum Thema "Advanced nanomaterials"

Wujcik, Evan K., und Yang Lu. „Advanced Nanomaterials for Bio-Monitoring“. In SoutheastCon 2018. IEEE, 2018. http://dx.doi.org/10.1109/secon.2018.8479069.

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Green, Martin A. „Nanomaterials for Photovoltaics“. In Advanced Optoelectronics for Energy and Environment. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/aoee.2013.jsa1a.1.

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Faraon, Victor, Rodica-Mariana Ion, Simona-Florentina Pop, Raluca Van-Staden und Jacobus-Frederick Van-Staden. „Porphyrins as molecular nanomaterials“. In Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies, herausgegeben von Paul Schiopu und George Caruntu. SPIE, 2010. http://dx.doi.org/10.1117/12.882110.

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Bi, Yong-guang, und Meng-qian Huang. „Preparation with Orthogonal Hydroxyapatite Nanomaterials“. In 2015 International Conference on Advanced Material Engineering. WORLD SCIENTIFIC, 2015. http://dx.doi.org/10.1142/9789814696029_0066.

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Minh, Le Quoc, Tran Kim Anh, Nguyen Thanh Binh und Vu Doan Mien. „New nanomaterials for photonic application“. In 2ND ASEAN - APCTP WORKSHOP ON ADVANCED MATERIALS SCIENCE AND NANOTECHNOLOGY: (AMSN 2010). AIP, 2012. http://dx.doi.org/10.1063/1.4732487.

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Lee, HeaYeon, und JuKyung Lee. „Advanced Biomimetic Nanodevice Using Nanotechnology Addressable Lipid Rafts Nanoarrays Toward Advanced Nanomaterials“. In ASME 2013 2nd Global Congress on NanoEngineering for Medicine and Biology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/nemb2013-93286.

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In recent years, a new paradigm of nanobiomedical devices combining miniaturization and integration has been exploited in areas such as combinational chemistry, biotechnology, engineering, proteomics and clinical diagnostics. One of the critical issues in the development of nanobiomedical system is how to differentiate signal-to-noise ratio per very small amount of signal. Biocompatible integrated nanopattern requires the fabrication of appropriately designed nanomatrix for high sensitivity homogenous assays, which are capable of ultimately mimic the physiological environment. We reported the nanomatrix geometry of a well-oriented nanowell array derived from nanofabrication technology which can easily be employed for digital detection with a high S/N ratio, miniaturization, integrated assays and single molecule analysis. In this present, we describe a nano(submicro) array of tethered lipid bilayer raft membranes comprising a biosensing platform.

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Han, Ke. „Characterization and Technology of Nanomaterials“. In 2016 4th International Conference on Advanced Materials and Information Technology Processing (AMITP 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/amitp-16.2016.9.

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Pelayo García de Arquer, F., und Edward H. Sargent. „Solution-processed nanomaterials for advanced optoelectronic and energy applications“. In Novel Optical Materials and Applications. Washington, D.C.: OSA, 2017. http://dx.doi.org/10.1364/noma.2017.nom4c.1.

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Yin, Huajie, Hongjie Tang, Xiuxin Wang, Yan Gao und Zhiyong Tang. „Application of Nanomaterials and Nanostructures in Fuel Cells“. In Advanced Optoelectronics for Energy and Environment. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/aoee.2013.asa4b.2.

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Faraon, Victor A., Simona F. Pop, Raluca M. Senin, Sanda M. Doncea und Rodica M. Ion. „Porphyrin-zeolite nanomaterials for hydrogen peroxide decomposition“. In Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies 2012, herausgegeben von Paul Schiopu und Razvan Tamas. SPIE, 2012. http://dx.doi.org/10.1117/12.966386.

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Berichte der Organisationen zum Thema "Advanced nanomaterials"

Biris, Alexandru S., und Vladimir P. Zharov. Advanced Functional Nanomaterials for Biological Processes. Fort Belvoir, VA: Defense Technical Information Center, Januar 2014. http://dx.doi.org/10.21236/ada599898.

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Grubbs, Robert H., und Andrew J. Boydston. Advanced Nanomaterials from Functional Cyclic Polymers. Fort Belvoir, VA: Defense Technical Information Center, Mai 2011. http://dx.doi.org/10.21236/ada546967.

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Chen, Junhong. Advanced Nanomaterials for High-Efficiency Solar Cells. Office of Scientific and Technical Information (OSTI), November 2013. http://dx.doi.org/10.2172/1108223.

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Kennedy, Alan, Jonathon Brame, Taylor Rycroft, Matthew Wood, Valerie Zemba, Charles Weiss, Matthew Hull, Cary Hill, Charles Geraci und Igor Linkov. A definition and categorization system for advanced materials : the foundation for risk-informed environmental health and safety testing. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41803.

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Novel materials with unique or enhanced properties relative to conventional materials are being developed at an increasing rate. These materials are often referred to as advanced materials (AdMs) and they enable technological innovations that can benefit society. Despite their benefits, however, the unique characteristics of many AdMs, including many nanomaterials, are poorly understood and may pose environmental safety and occupational health (ESOH) risks that are not readily determined by traditional risk assessment methods. To assess these risks while keeping up with the pace of development, technology developers and risk assessors frequently employ risk-screening methods that depend on a clear definition for the materials that are to be assessed (e.g., engineered nanomaterial) as well as a method for binning materials into categories for ESOH risk prioritization. In this study, we aim to establish a practitioner-driven definition for AdMs and a practitioner-validated framework for categorizing AdMs into conceptual groupings based on material characteristics. The definition and categorization framework established here serve as a first step in determining if and when there is a need for specific ESOH and regulatory screening for an AdM as well as the type and extent of risk-related information that should be collected or generated for AdMs and AdM-enabled technologies.

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Haber, Lynne, Anthony Bednar, Alan Kennedy, Mark Ballentine und Richard Canady. Methods evaluation for assessing release of manufactured nanomaterials from polymers, consistent with the NanoGRID framework : Advanced and Additive Materials : Sustainability for Army Acquisitions. Engineer Research and Development Center (U.S.), August 2019. http://dx.doi.org/10.21079/11681/33704.

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