Journal articles: 'Inorganic Semiconducting Nanomaterials'

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Sasi, Soorya, Sunish K. Sugunan, P. Radhakrishnan Nair, K. R. V. Subramanian, and Suresh Mathew. "Scope of surface-modified molecular and nanomaterials in gel/liquid forms for developing mechanically flexible DSSCs/QDSSCs." Photochemical & Photobiological Sciences 18, no. 1 (2019): 15–29. http://dx.doi.org/10.1039/c8pp00293b.

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In this perspective article, we discuss the possibilities of integrating liquefied organic and inorganic semiconducting materials with tunable optoelectronic properties into solvent-free fluidic systems of functional optoelectronic materials to generate flexible DSSCs/QDSSCs.

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Gatou, Maria-Anna, Ioanna-Aglaia Vagena, Natassa Pippa, Maria Gazouli, Evangelia A. Pavlatou, and Nefeli Lagopati. "The Use of Crystalline Carbon-Based Nanomaterials (CBNs) in Various Biomedical Applications." Crystals 13, no. 8 (August 10, 2023): 1236. http://dx.doi.org/10.3390/cryst13081236.

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This review study aims to present, in a condensed manner, the significance of the use of crystalline carbon-based nanomaterials in biomedical applications. Crystalline carbon-based nanomaterials, encompassing graphene, graphene oxide, reduced graphene oxide, carbon nanotubes, and graphene quantum dots, have emerged as promising materials for the development of medical devices in various biomedical applications. These materials possess inorganic semiconducting attributes combined with organic π-π stacking features, allowing them to efficiently interact with biomolecules and present enhanced light responses. By harnessing these unique properties, carbon-based nanomaterials offer promising opportunities for future advancements in biomedicine. Recent studies have focused on the development of these nanomaterials for targeted drug delivery, cancer treatment, and biosensors. The conjugation and modification of carbon-based nanomaterials have led to significant advancements in a plethora of therapies and have addressed limitations in preclinical biomedical applications. Furthermore, the wide-ranging therapeutic advantages of carbon nanotubes have been thoroughly examined in the context of biomedical applications.

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Rajakumar, Govindasamy, Xiu-Hua Zhang, Thandapani Gomathi, Sheng-Fu Wang, Mohammad Azam Ansari, Govindarasu Mydhili, Gnanasundaram Nirmala, Mohammad A. Alzohairy, and Ill-Min Chung. "Current Use of Carbon-Based Materials for Biomedical Applications—A Prospective and Review." Processes 8, no. 3 (March 20, 2020): 355. http://dx.doi.org/10.3390/pr8030355.

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Among a large number of current biomedical applications in the use of medical devices, carbon-based nanomaterials such as graphene (G), graphene oxides (GO), reduced graphene oxide (rGO), and carbon nanotube (CNT) are frontline materials that are suitable for developing medical devices. Carbon Based Nanomaterials (CBNs) are becoming promising materials due to the existence of both inorganic semiconducting properties and organic π-π stacking characteristics. Hence, it could effectively simultaneously interact with biomolecules and response to the light. By taking advantage of such aspects in a single entity, CBNs could be used for developing biomedical applications in the future. The recent studies in developing carbon-based nanomaterials and its applications in targeting drug delivery, cancer therapy, and biosensors. The development of conjugated and modified carbon-based nanomaterials contributes to positive outcomes in various therapies and achieved emerging challenges in preclinical biomedical applications. Subsequently, diverse biomedical applications of carbon nanotube were also deliberately discussed in the light of various therapeutic advantages.

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Yao, Wei-Tang, and Shu-Hong Yu. "Synthesis of Semiconducting Functional Materials in Solution: From II-VI Semiconductor to Inorganic-Organic Hybrid Semiconductor Nanomaterials." Advanced Functional Materials 18, no. 21 (November 10, 2008): 3357–66. http://dx.doi.org/10.1002/adfm.200800672.

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Yao, Wei-Tang, and Shu-Hong Yu. "Synthesis of Semiconducting Functional Materials in Solution: From II-VI Semiconductor to Inorganic-Organic Hybrid Semiconductor Nanomaterials." Advanced Functional Materials 18, no. 22 (November 24, 2008): NA. http://dx.doi.org/10.1002/adfm.200890095.

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Ahlawat, Dharamvir Singh, and Indu Yadav. "Optical, morphological and thermal investigation of Cu doped ternary semiconducting (Cd1-xZnxS:Cu) nanomaterials." Optical Materials 119 (September 2021): 111377. http://dx.doi.org/10.1016/j.optmat.2021.111377.

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Mazzanti, Andrea, Zhijie Yang, Mychel G. Silva, Nailiang Yang, Giancarlo Rizza, Pierre-Eugène Coulon, Cristian Manzoni, et al. "Light–heat conversion dynamics in highly diversified water-dispersed hydrophobic nanocrystal assemblies." Proceedings of the National Academy of Sciences 116, no. 17 (April 5, 2019): 8161–66. http://dx.doi.org/10.1073/pnas.1817850116.

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We investigate, with a combination of ultrafast optical spectroscopy and semiclassical modeling, the photothermal properties of various water-soluble nanocrystal assemblies. Broadband pump–probe experiments with ∼100-fs time resolution in the visible and near infrared reveal a complex scenario for their transient optical response that is dictated by their hybrid composition at the nanoscale, comprising metallic (Au) or semiconducting (Fe3O4) nanostructures and a matrix of organic ligands. We track the whole chain of energy flow that starts from light absorption by the individual nanocrystals and subsequent excitation of out-of-equilibrium carriers followed by the electron–phonon equilibration, occurring in a few picoseconds, and then by the heat release to the matrix on the 100-ps timescale. Two-dimensional finite-element method electromagnetic simulations of the composite nanostructure and multitemperature modeling of the energy flow dynamics enable us to identify the key mechanism presiding over the light–heat conversion in these kinds of nanomaterials. We demonstrate that hybrid (organic–inorganic) nanocrystal assemblies can operate as efficient nanoheaters by exploiting the high absorption from the individual nanocrystals, enabled by the dilution of the inorganic phase that is followed by a relatively fast heating of the embedding organic matrix, occurring on the 100-ps timescale.

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Rury, Aaron S., Adedayo M. Sanni, Destiny Konadu, and Tyler Danielson. "Evidence of defect-induced broadband light emission from 2D Ag–Bi double perovskites grown at liquid–liquid interfaces." Journal of Chemical Physics 158, no. 1 (January 7, 2023): 011101. http://dx.doi.org/10.1063/5.0134568.

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Controlling the light emission spectra of low-dimensional hybrid organic–inorganic materials remains an important goal toward the implementation of these materials into real-world optoelectronic devices. In this study, we present evidence that the self-assembly of two-dimensional (2D) silver bismuth iodide double perovskite derivatives at the interface of aqueous and organic solutions leads to the formation of defects capable of modulating the light emission spectra of these materials. Through an analysis of the structural parameters used to explain the photoluminescence (PL) spectra of 2D perovskites, we show the light spectra emitted by (4-ammonium methyl)piperidinium (4-AMP) and (3-ammonium methyl)pyridinium (3-AMPy)-spaced AgBiI8 double perovskites formed through interfacial solution-phase chemistry differ qualitatively and quantitatively from thin film samples. We use previous results to propose the differences observed in the PL spectra of different material morphologies stem from equatorial iodide vacancy formation driven by the kinetics of self-assembly at the liquid–liquid interface. These results show the generality of these chemical physics principles in the formation of defect sites in solution-processed semiconducting nanomaterials, which could help enable their broad use in optoelectronic technologies.

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Yao, Wei-Tang, and Shu-Hong Yu. "Inside Front Cover: Synthesis of Semiconducting Functional Materials in Solution: From II-VI Semiconductor to Inorganic-Organic Hybrid Semiconductor Nanomaterials (Adv. Funct. Mater. 21/2008)." Advanced Functional Materials 18, no. 21 (November 10, 2008): NA. http://dx.doi.org/10.1002/adfm.200890085.

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Nicolosi, Valeria. "Processing and characterisation of two-dimensional nanostructures." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C510. http://dx.doi.org/10.1107/s2053273314094893.

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Low-dimensional nanostructured materials such as organic and inorganic nanotubes, nanowires and platelets are potentially useful in a number of areas of nanoscience and nanotechnology due to their remarkable mechanical, electrical and thermal properties. However difficulties associated with their lack of processability have seriously hampered both. In the last few years dispersion and exfoliation methods have been developed and demonstrated to apply universally to 1D and 2D nanostructures of very diverse nature, offering a practical means of processing the nanostructures for a wide range of innovative technologies. Among the first materials to have benefitted most from these advances are carbon nanotubes [6] and more recently graphene. Recently this work has been extended to boron nitride and a wide range of two-dimensional transition metal chalcogenides. These are potentially important because they occur in >40 different types with a wide range of electronic properties, varying from metallic to semiconducting. To make real applications truly feasible, however, it is crucial to fully characterize the nanostructures on the atomic scale and correlate this information with their physical and chemical properties. Advances in aberration-corrected optics in electron microscopy have revolutionised the way to characterise nano-materials, opening new frontiers for materials science. With the recent advances in nanostructure processability, electron microscopes are now revealing the structure of the individual components of nanomaterials, atom by atom. Here we will present an overview of very different low-dimensional materials issues, showing what aberration-corrected electron microscopy can do to answer materials scientists' questions. Particular emphasis will be given to the investigation of hexagonal boron nitride (hBN), molybdenum disulfide (MoS2), and tungsten disulfide (WS2) and the study of their structure, defects, stacking sequence, vacancies and low-atomic number individual adatoms. The analyses of the h-BN data showed that majority of nanosheets retain bulk stacking. However several of the images displayed stacking different from the bulk. Similar, to 2D h-BN, images of MoS2 and WS2 have shown the stacking previously unobserved in the bulk. This novel stacking consists of Mo/W stacked on the top each other in the consecutive layers.

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Nature, Science. "Aspect-ratio Dependence of Optical Nonlinearities on Resonance with Longitudinal Surface Plasmon in Au Nanorods: Unique Character versus Common Behavior." SCIENCE NATURE 1, no. 1 (December 13, 2018): 001–7. http://dx.doi.org/10.30598/snvol1iss1pp001-007year2018.

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Unique character and common behavior are two distinguished things. In frontier nanoscience and nanotechnology, unique characters were normally obtained in some novel exotics materials such as metal-metal core-shell materials, metallic-semiconducting hybrid nanomaterials, and organic-inorganics complex nano-compounds. On the other hand, normal behavior of natural phenomena including in nano-size objects were obviously predicted based on their exact size related to confinement effect, and capability to interact with another physical system in nature. Here, we report an example of unique character due to evolution nonlinear behavior observed in gold nanorod with their aspect-ratio dependence of optical nonlinearities investigated by femtosecond Z-scan measurements closed to resonance longitudinal surface plasmon peak in gold nanorods (Au NRs). Saturable absorption manifests itself at low excitation (laser irradiances < ~7.0 GW/cm2), while reverse saturable absorption dominates at higher excitation. Both the nonlinear processes are found to increase with the aspect ratio of Au NRs. Based on the discrete dipole approximation, qualitative explanations are presented for the observed nonlinear behavior. While common behavior in metallic quantum dots or other shapes of metallic nanomaterials was not the significant in our observation.

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Nature, Science. "Aspect-ratio Dependence of Optical Nonlinearities on Resonance with Longitudinal Surface Plasmon in Au Nanorods: Unique Character versus Common Behavior." SCIENCE NATURE 1, no. 1 (December 13, 2018): 001–7. http://dx.doi.org/10.30598/vol1iss1pp001-007year2018.

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Unique character and common behavior are two distinguished things. In frontier nanoscience and nanotechnology, unique characters were normally obtained in some novel exotics materials such as metal-metal core-shell materials, metallic-semiconducting hybrid nanomaterials, and organic-inorganics complex nano-compounds. On the other hand, normal behavior of natural phenomena including in nano-size objects were obviously predicted based on their exact size related to confinement effect, and capability to interact with another physical system in nature. Here, we report an example of unique character due to evolution nonlinear behavior observed in gold nanorod with their aspect-ratio dependence of optical nonlinearities investigated by femtosecond Z-scan measurements closed to resonance longitudinal surface plasmon peak in gold nanorods (Au NRs). Saturable absorption manifests itself at low excitation (laser irradiances < ~7.0 GW/cm2), while reverse saturable absorption dominates at higher excitation. Both the nonlinear processes are found to increase with the aspect ratio of Au NRs. Based on the discrete dipole approximation, qualitative explanations are presented for the observed nonlinear behavior. While common behavior in metallic quantum dots or other shapes of metallic nanomaterials was not the significant in our observation.

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Ammam, Malika, and E. Bradley Easton. "Advanced NOx gas sensing based on novel hybrid organic–inorganic semiconducting nanomaterial formed between pyrrole and Dawson type polyoxoanion [P2Mo18O62]6−." Journal of Materials Chemistry 21, no. 22 (2011): 7886. http://dx.doi.org/10.1039/c1jm11244a.

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PLENTZ, FLÁVIO, HENRIQUE B. RIBEIRO, ADO JORIO, MARCOS A. PIMENTA, C. FANTINI, V. S. T. PERESSINOTTO, C. A. FURTADO, and A. P. SANTOS. "PHOTOLUMINESCENCE AND PHOTOLUMINESCENCE EXCITATION SPECTROSCOPY OF SEMICONDUCTING SINGLE WALL CARBON NANOTUBES." International Journal of Modern Physics B 23, no. 12n13 (May 20, 2009): 2676–77. http://dx.doi.org/10.1142/s0217979209062165.

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Since the discovery of single wall carbon nanotubes (SWNT) in 1991, this nanomaterial has received an enormous attention from the nanoscience and nanotechnology community, not only due to the clear prospects for applications such as novel nanoelectronic and nano-optoelectronic devices, but also because this unique one dimensional (1D) system offered a new possibility for the investigation of novel physical phenomena in low dimensions. In 2002 it was demonstrated that photoluminescence (PL) could be observed in suspensions of isolated SWNTs and, later on, that PL could also be observed from individual, suspended SWNTs. Since then, there has been an increasing amount of work directed towards the investigation of the optical properties of semiconducting SWNTs by PL and photoluminescence excitation spectroscopy (PLE), and the use of PL and PLE for the qualitative and quantitative identification of SWNTs species within and ensemble of carbon nanotubes. In 2005 it was shown that the observed optical transitions are associated to 1D excitons and, from the point of view of optical properties, the rich physics of excitons in SWNTs has received much attention. For instance, it is now clear that excitons and exciton-phonon interactions play a major role in the mechanisms responsible for the emission and the absorption of light in SWNTs. Also, the interaction of SWNTs with their vicinity, which includes the interaction with organic and inorganic molecules, and the modifications in the excitonic system caused by changes in the dielectric constant, can be readily investigated by PL and PLE. In this talk we presented an overview of our recent work in the optical spectroscopy of SWNTs.1–3 In particular, we showed some of our results on the investigation of the exciton-phonon interaction in semiconducting SWNTs and on the modifications in the PL and PLE spectra associated to the interactions with its surrounding environment. Note from Publisher: This article contains the abstract only.

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Olubosede, Olusayo, Mohd Amiruddin Abd Rahman, Abdullah Alqahtani, Miloud Souiyah, Mouftahou B. Latif, Wasiu Adeyemi Oke, Nahier Aldhafferi, and Taoreed O. Owolabi. "Tailoring the Energy Harvesting Capacity of Zinc Selenide Semiconductor Nanomaterial through Optical Band Gap Modeling Using Genetically Optimized Intelligent Method." Crystals 12, no. 1 (December 27, 2021): 36. http://dx.doi.org/10.3390/cryst12010036.

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Zinc selenide (ZnSe) nanomaterial is a binary semiconducting material with unique features, such as high chemical stability, high photosensitivity, low cost, great excitation binding energy, non-toxicity, and a tunable direct wide band gap. These characteristics contribute significantly to its wide usage as sensors, optical filters, photo-catalysts, optical recording materials, and photovoltaics, among others. The light energy harvesting capacity of this material can be enhanced and tailored to meet the required application demand through band gap tuning with compositional modulation, which influences the nano-structural size, as well as the crystal distortion of the semiconductor. This present work provides novel ways whereby the wide energy band gap of zinc selenide can be effectively modulated and tuned for light energy harvesting capacity enhancement by hybridizing a support vector regression algorithm (SVR) with a genetic algorithm (GA) for parameter combinatory optimization. The effectiveness of the SVR-GA model is compared with the stepwise regression (SPR)-based model using several performance evaluation metrics. The developed SVR-GA model outperforms the SPR model using the root mean square error metric, with a performance improvement of 33.68%, while a similar performance superiority is demonstrated by the SVR-GA model over the SPR using other performance metrics. The intelligent zinc selenide energy band gap modulation proposed in this work will facilitate the fabrication of zinc selenide-based sensors with enhanced light energy harvesting capacity at a reduced cost, with the circumvention of experimental stress.

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Xu, Jia-Le, Li-Wen Li, Yu-Xuan Luo, Sheng-Hao Yuan, and Ning-Ning Liu. "Antifungal Nanomaterials: Current Progress and Future Directions." Innovations in Digital Health, Diagnostics, and Biomarkers, July 13, 2020. http://dx.doi.org/10.36401/iddb-20-03.

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ABSTRACT Fungal infection poses a severe threat to human health worldwide resulting in a serious problem in clinic. Due to the limited arsenal of existing antifungal drugs, the nanomaterials were thus regarded as the candidate for developing new antifungal drugs. On the one hand, the antifungal nanomaterials are divided into inorganic nanomaterials, organic nanomaterials, and hybrid nanomaterials, among which inorganic nanoparticles include metal and semiconducting categories. On the other hand, they can also be divided into inorganic particles, organic structures, and mixed nanostructures. Currently various directions for the research and development of antifungal nanomaterials are undergoing. To improve the antifungal effect, the chemical modification of nanomaterials and combination with the available drugs are two strategies widely used. In addition, optimizing the synthetic process of nanomaterials is also a major method to broaden their antifungal application. This review focuses on the current research progress and cutting-edge technologies of antifungal nanomaterials in the field of pharmacodynamics, synthesis and combination of drugs. The nanomaterial will provide a promising and broadly effective antifungal strategy and represent a potentially repositionable candidate for the treatment of fungal infections.

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Lee, Jaebeom, Nicholas A. Kotov, and Alexander O. Govorov. "Assembly of Nanomaterials using Polymers and Biomaterials: Sensing and Electronic Applications." MRS Proceedings 901 (2005). http://dx.doi.org/10.1557/proc-0901-ra22-54-rb22-54.

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AbstractThe hybrid assembly of inorganic nanomaterials upon chemical and biological bonding has occupied attentions to yield manifold optical and electromagnetic properties. Nanomaterials that can be virtually conjugated with any other nanomaterials by ligand-receptor / antigen-antibody reactions, polymer tethering, and DNA hybridization are of importance for fundamental comprehension of electronic process in nano-scale regime as well as for development of advanced sensing and imaging devices. Semiconducting nanoparticles(NPs)/ nanowires(NWs) like CdTe that have compatibly narrow range of strong photoluminescence (PL) with broad range of absorbance band stand in the spotlight of imaging and sensing materials. Optical effects in noble metallic NPs such as Au and Ag have been worth noticing due to localized surface plasmons. These optical modes lead to highly localized electromagnetic fields outside the particles that take advantage of the development of novel system such as surface enhanced Raman spectroscopy (SERS) and highly compacted optoelectronic devices and sensors. In particular, it is known that metallic NPs has stronger plasmon field than the surface of bulky metals, leading to potent interactions to adjacent materials in secured conjugated superstructures that induce non-linear optical properties. In this report, we review on a novel biological / polymeric inspired hybrid superstructures between semiconducting CdTe nanowires and Au or Ag nanoparticles. This superstructure demonstrates remarkable optical effects i.e., PL en-hancement of NWs, sensing application for temperature and solvents stemming from SERS-like collective interactions of NPs and NWs., and light harvest from Förster resonance energy tra-nsfer (FRET).

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Yufa, Nataliya A., Amadou L. Cisse, Seth B. Darling, Sam D. Bader, Philippe Guyot-Sionnest, and Steven J. Sibener. "Self-Assembly of Magnetic and Semiconductiong Nanoparticles on Modified Diblock Copolymer Templates." MRS Proceedings 901 (2005). http://dx.doi.org/10.1557/proc-0901-ra09-06.

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AbstractCombining inorganic and organic components to create functional materials has been an active area of research in recent years. Inorganic components possess useful electric, photonic, or magnetic properties while organic components can self-assemble into a variety of morphologies on the nanoscale. We describe a novel approach for arraying nanoparticles using a modified diblock copolymer scaffold. Thin (30 nm) films of poly(styrene-block-methylmethacrylate) (PS-b-PMMA) copolymer were used as a substrate. Upon annealing, PS-b-PMMA forms lying-down cylinders of PMMA in a matrix of PS. These thin films were modified by exposure to ultraviolet light in vacuum which photochemically thinned the PMMA, creating a more highly corrugated surface. We find that colloidal superparamagnetic FePt nanodots and semiconducting CdSe nanodots deposited on this surface show a strong preference for the photochemically modified phase. This hierarchical self-assembly method may prove useful for many nanomaterials-based applications.

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Kang, Saewon, Gill M. Biesold, Hansol Lee, Daria Bukharina, Zhiqun Lin, and Vladimir V. Tsukruk. "Dynamic Chiro‐Optics of Bio‐Inorganic Nanomaterials via Seamless Co‐Assembly of Semiconducting Nanorods and Polysaccharide Nanocrystals." Advanced Functional Materials, July 28, 2021, 2104596. http://dx.doi.org/10.1002/adfm.202104596.

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Han, Hyunjoo, Gianna Di Francesco, Amber Sexton, Andrew Tretiak, and Mathew M. Maye. "Greener Synthesis of Nanoparticles Using Fine Tuned Hydrothermal Routes." MRS Proceedings 1220 (2009). http://dx.doi.org/10.1557/proc-1220-bb03-02.

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AbstractThe wet chemical synthesis of energy and sensor relevant nanomaterials often requires large amounts of high boiling point solvents, grams of reactants, solvent-based purification, and the use of oxygen free atmospheres. These synthetic routes are also prone to poor scalability due to requirements of precise control of high temperatures. Because of this, the potential use of metallic nanoparticles and semiconductive quantum dots (q-dots) in energy transfer and real time biosensor applications is labor intensive and expensive. We have explored a green alternative route that involves the colloidal synthesis of CdSe and CdTe quantum dots under well-controlled hydrothermal conditions (100-200°C) using simple inorganic precursors. The resulting nanomaterials are of high quality, and are easily processed depending upon application, and their synthesis is scalable. Temperature control, and synthetic scalability is provided by the use of a synthetic microwave reactor, which employs computer-controlled dielectric heating for the rapid and controllable heating.

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Journal articles on the topic 'Inorganic Semiconducting Nanomaterials'

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