Relevant bibliographies by topics / Inorganic Nanostructures - Synthesis

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Academic literature on the topic 'Inorganic Nanostructures - Synthesis'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 September 2023

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Journal articles on the topic "Inorganic Nanostructures - Synthesis"

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Fang, Xiaosheng, Linfeng Hu, Changhui Ye, and Lide Zhang. "One-dimensional inorganic semiconductor nanostructures: A new carrier for nanosensors." Pure and Applied Chemistry 82, no. 11 (August 1, 2010): 2185–98. http://dx.doi.org/10.1351/pac-con-09-11-40.

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One-dimensional (1D) inorganic semiconductor nanostructures have witnessed an explosion of interest over the last decade because of advances in their controlled synthesis and unique property and potential applications. A wide range of gases, chemicals, biomedical nanosensors, and photodetectors have been assembled using 1D inorganic semiconductor nanostructures. The high-performance characteristics of these nanosensors are particularly attributable to the inorganic semiconducting nanostructure high surface-to-volume ratio (SVR) and its rationally designed surface. In this review, we provide a brief summary of the state-of-the-art research activities in the field of 1D inorganic semiconductor nanostructure-based nanosensors. Some perspectives and the outlook for future developments in this area are presented.
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Ríos-Silva, Mirtha, Myriam Pérez, Roberto Luraschi, Esteban Vargas, Claudia Silva-Andrade, Jorge Valdés, Juan Marcelo Sandoval, Claudio Vásquez, and Felipe Arenas. "Anaerobiosis favors biosynthesis of single and multi-element nanostructures." PLOS ONE 17, no. 10 (October 7, 2022): e0273392. http://dx.doi.org/10.1371/journal.pone.0273392.

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Herein we report the use of an environmental multimetal(loid)-resistant strain, MF05, to biosynthesize single- or multi-element nanostructures under anaerobic conditions. Inorganic nanostructure synthesis typically requires methodologies and conditions that are harsh and environmentally hazardous. Thus, green/eco-friendly procedures are desirable, where the use of microorganisms and their extracts as bionanofactories is a reliable strategy. First, MF05 was entirely sequenced and identified as an Escherichia coli-related strain with some genetic differences from the traditional BW25113. Secondly, we compared the CdS nanostructure biosynthesis by whole-cell in a design defined minimal culture medium containing sulfite as the only sulfur source to obtain sulfide reduction from a low-cost chalcogen reactant. Under anaerobic conditions, this process was greatly favored, and irregular CdS (ex. 370 nm; em. 520–530 nm) was obtained. When other chalcogenites were tested (selenite and tellurite), only spherical Se0 and elongated Te0 nanostructures were observed by TEM and analyzed by SEM-EDX. In addition, enzymatic-mediated chalcogenite (sulfite, selenite, and tellurite) reduction was assessed by using MF05 crude extracts in anaerobiosis; similar results for nanostructures were obtained; however Se0 and Te0 formation were more regular in shape and cleaner (with less background). Finally, the in vitro nanostructure biosynthesis was assessed with salts of Ag, Au, Cd, and Li alone or in combination with chalcogenites. Several single or binary nanostructures were detected. Our results showed that MF05 is a versatile anaerobic bionanofactory for different types of inorganic NS. synthesis.
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Escudero, Alberto, Carolina Carrillo-Carrión, Elena Romero-Ben, Ana Franco, Christian Rosales-Barrios, Mª Carmen Castillejos, and Noureddine Khiar. "Molecular Bottom-Up Approaches for the Synthesis of Inorganic and Hybrid Nanostructures." Inorganics 9, no. 7 (July 17, 2021): 58. http://dx.doi.org/10.3390/inorganics9070058.

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Chemical routes for the synthesis of nanostructures are fundamental in nanoscience. Among the different strategies for the production of nanostructures, this article reviews the fundamentals of the bottom-up approaches, focusing on wet chemistry synthesis. It offers a general view on the synthesis of different inorganic and hybrid organic–inorganic nanostructures such as ceramics, metal, and semiconductor nanoparticles, mesoporous structures, and metal–organic frameworks. This review article is especially written for a wide audience demanding a text focused on the basic concepts and ideas of the synthesis of inorganic and hybrid nanostructures. It is styled for both early researchers who are starting to work on this topic and also non-specialist readers with a basic background on chemistry. Updated references and texts that provide a deeper discussion and describing the different synthesis strategies in detail are given, as well as a section on the current perspectives and possible future evolution.
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Tian, Yan, Zekun Guo, Tong Zhang, Haojian Lin, Zijuan Li, Jun Chen, Shaozhi Deng, and Fei Liu. "Inorganic Boron-Based Nanostructures: Synthesis, Optoelectronic Properties, and Prospective Applications." Nanomaterials 9, no. 4 (April 3, 2019): 538. http://dx.doi.org/10.3390/nano9040538.

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Inorganic boron-based nanostructures have great potential for field emission (FE), flexible displays, superconductors, and energy storage because of their high melting point, low density, extreme hardness, and good chemical stability. Until now, most researchers have been focused on one-dimensional (1D) boron-based nanostructures (rare-earth boride (REB6) nanowires, boron nanowires, and nanotubes). Currently, two-dimensional (2D) borophene attracts most of the attention, due to its unique physical and chemical properties, which make it quite different from its corresponding bulk counterpart. Here, we offer a comprehensive review on the synthesis methods and optoelectronics properties of inorganic boron-based nanostructures, which are mainly concentrated on 1D rare-earth boride nanowires, boron monoelement nanowires, and nanotubes, as well as 2D borophene and borophane. This review paper is organized as follows. In Section I, the synthesis methods of inorganic boron-based nanostructures are systematically introduced. In Section II, we classify their optical and electrical transport properties (field emission, optical absorption, and photoconductive properties). In the last section, we evaluate the optoelectronic behaviors of the known inorganic boron-based nanostructures and propose their future applications.
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Xu, Hui, Yuci Xu, Xinchang Pang, Yanjie He, Jaehan Jung, Haiping Xia, and Zhiqun Lin. "A general route to nanocrystal kebabs periodically assembled on stretched flexible polymer shish." Science Advances 1, no. 2 (March 2015): e1500025. http://dx.doi.org/10.1126/sciadv.1500025.

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Assembling nanoparticles into one-dimensional (1D) nanostructures with precisely controlled size and shape renders the exploration of new properties and construction of 1D miniaturized devices possible. The physical properties of such nanostructures depend heavily on the size, chemical composition, and surface chemistry of nanoparticle constituents, as well as the close proximity of adjacent nanoparticles within the 1D nanostructure. Chemical synthesis provides an intriguing alternative means of creating 1D nanostructures composed of self-assembled nanoparticles in terms of material diversity, size controllability, shape regularity, and low-cost production. However, this is an area where progress has been slower. We report an unconventional yet general strategy to craft an exciting variety of 1D nanonecklace-like nanostructures comprising uniform functional nanodiscs periodically assembled along a stretched flexible polymer chain by capitalizing on judiciously designed amphiphilic worm-like diblock copolymers as nanoreactors. These nanostructures can be regarded as organic-inorganic shish-kebabs, in which nanodisc kebabs are periodically situated on a stretched polymer shish. Simulations based on self-consistent field theory reveal that the formation of organic-inorganic shish-kebabs is guided by the self-assembled elongated star-like diblock copolymer constituents constrained on the highly stretched polymer chain.
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Rao, C. N. R., Ved Varun Agrawal, Kanishka Biswas, Ujjal K. Gautam, Moumita Ghosh, A. Govindaraj, G. U. Kulkarni, K. P. Kalyanikutty, Kripasindhu Sardar, and S. R. C. Vivekchand. "Soft chemical approaches to inorganic nanostructures." Pure and Applied Chemistry 78, no. 9 (January 1, 2006): 1619–50. http://dx.doi.org/10.1351/pac200678091619.

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Chemical approaches have emerged as the preferred means to synthesize nanostructures of various inorganic materials due to superior control over size, shape, and surface functionality. This article provides an overview of the contributions made in the authors' laboratory toward the synthesis of nanocrystals, nanowires, nanotubes, nanowalls, and other nanostructures of several inorganic materials. Thus, thiolized monodisperse metal nanocrystals have been obtained by a ligand exchange process and the stability of their 2D assemblies studied. Nanocrystals of pure CoO and ReO3 have been synthesized, for the first time, employing a one-pot solvothermal technique. The solvothermal method has also been used to obtain organic soluble nanocrystals of semiconducting materials such as CdS, CdSe, and GaN. Inorganic nanowires and nanotubes have been prepared by several soft chemical routes, including surfactant-assisted synthesis and hydrogel templating. A simple reaction between elemental Se and Te with NaBH4 in water has been utilized to obtain nanowires of Se and Te. We also describe the nebulized spray pyrolysis (NSP) technique to synthesize carbon nanotubes and nanowires of metals and III-V nitride semiconductors with improved yields. An important new technique for preparing nanocrystalline films of materials is by the reaction of the metal precursors in the organic layer at the interface of two immiscible liquids, with appropriate reagents. Nanocrystalline films of metals, alloys, and semiconductors and ultra-thin single-crystalline films of metal chalcogenides and oxides have been obtained by this technique. Apart from these, we discuss single precursor routes to iron sulfide, GeSe2, and III-V nitride nanostructures as well as the first synthesis of GaS and GaSe nanowalls and nanotubes obtained through exfoliation by laser irradiation and thermal treatment.
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Ho, Ghim Wei, and Andrew See Weng Wong. "Aqueous Synthesis towards Vertically-Aligned and Selective Pattern of ZnO Nanostructures Arrays." Advanced Materials Research 67 (April 2009): 7–12. http://dx.doi.org/10.4028/www.scientific.net/amr.67.7.

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For any future cost-effective applications of inorganic nanostructures in particular hybrid photovoltaic cell, solution processable and selective printable of inorganic nanomaterials is essential. The patterning and growth of highly ordered arrays of crystalline ZnO inorganic nanostructures use simple soft lithography technique and mild reaction conditions; both low in temperature and free from harmful organic additives. Variable yet controllable anisotropic growth of ZnO nanowires has been demonstrated on the transferred patterns of ZnO nanocystals.
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Ren, Haoqi, Jie Cui, and Shaodong Sun. "Water-guided synthesis of well-defined inorganic micro-/nanostructures." Chemical Communications 55, no. 64 (2019): 9418–31. http://dx.doi.org/10.1039/c9cc04293h.

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Jan, Jeng Shiung, Po Jui Chen, and Yu Han Ho. "Synthesis of Gold Nanoparticle/Silica Nanostructures." Materials Science Forum 688 (June 2011): 321–25. http://dx.doi.org/10.4028/www.scientific.net/msf.688.321.

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A novel approach is proposed to prepare organic-inorganic composite tubular structure by mineralizing silica and/or gold nanoparticle in the LbL assembled polypeptide multilayers films. Mesoporous silica (m-SiO2) and gold nanoparticle/mesoporous silica (Au NP/m-SiO2) tubes were prepared by subsequent calcination. The LbL assembled poly-L-lysine (PLL)/poly-L-tyrosine (PLT) multilayer film within the inner pores of polycarbonate templates acts as both a mineralizing agent and template for the formation of these materials. The as-prepared mesoporous SiO2and Au NP/m-SiO2tubes have well-defined structures. Gold nanoparticles with size smaller than 8 nm were immobilized in the silica network and the as-prepared Au NP/m-SiO2tubes exhibit good catalytic activity towards the reduction of p-nitrophenol. This approach may provide a facile and general method to synthesize organic-inorganic and metal-oxide nanocomposites with different composition and structures.
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Cai, Jiabai, and Shunxing Li. "Photocatalytic Treatment of Environmental Pollutants using Multilevel- Structure TiO2-based Organic and Inorganic Nanocomposites." Current Organocatalysis 7, no. 3 (November 30, 2020): 161–78. http://dx.doi.org/10.2174/2213337207999200701214637.

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Nanostructured materials often exhibit unique physical properties, such as fast carrier transport, subwavelength optical waveguiding, and a high surface-area-to-volume ratio. When the size of a material is reduced to nanoscale dimensions, its physical and chemical properties can change dramatically. In addition, nanostructures offer exciting new opportunities for environmental applications. In this review, we aim to provide an up-to-date summary of recent research related to multifunctional TiO2-based inorganic and organic semiconductor nanomaterials, covering both their synthesis and applications. After a brief introduction of the definition and classification of TiO2-based inorganic and organic semiconductor nanomaterial structures, we discuss various application strategies, such as sewage treatment, heavy metal removal, and the oxidation of alcohols to the corresponding aldehydes. In our previous work, we fabricated a variety of TiO2-based hollow spheres using a diverse range of materials from inorganic semiconductors to organic semiconductors and applied these structures as photocatalysts. Further, the development of these nanostructures may enable numerous applications in the field of environmental technology.
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Dissertations / Theses on the topic "Inorganic Nanostructures - Synthesis"

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Sadasivan, Sajanikumari. "Surfactant mediated synthesis of inorganic nanostructures." Thesis, University of Bristol, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289641.

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Lee, Joun. "Biological assembly and synthesis of inorganic nanostructures." Diss., [Riverside, Calif.] : University of California, Riverside, 2009. http://proquest.umi.com/pqdweb?index=0&did=1957320801&SrchMode=2&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1269281222&clientId=48051.

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Thesis (Ph. D.)--University of California, Riverside, 2009.
Includes abstract. Available via ProQuest Digital Dissertations. Title from first page of PDF file (viewed March 12, 2010). Includes bibliographical references. Also issued in print.
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Xu, Lan. "Synthesis of Perylenediimide-Functionalized Silsesquioxane Nanostructures." TopSCHOLAR®, 2014. http://digitalcommons.wku.edu/theses/1371.

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Organic semiconductors functionalized nanostructures are becoming as promising materials for electronic device applications including organic photovoltaics (OPVs). Perylenediimide (PDI) derivatives have also been known as one of the best n-type organic semiconductors. PDI derivatives can form bulk materials, which are both photochemically and thermally stable and have been widely used in various optoelectronic devices. Due to the formation of high electron mobility of crystalline domains, they prefer to incorporate into a silsesquioxane network. Here, we describe the potential applicability of perylenediimide functionalized silsesquioxane nanoribbons (PDI-dimethyl nanoribbons) as an acceptor for optoelectronic devices. We have developed synthetic procedures to make the PDI-dimethyl nanoribbons by the substitution reaction and the modified Stöber method. The PDI-dimethylethoxy silane precursor was produced in high yield by substituting 3-aminopropyldimethylethoxysilane on perylene-3,4,9,10-tetracarboxylicdianhydride as side chains. The optically active PDI-dimethyl nanoribbons were then formed upon hydrolysis with the certain concentration of ammonium hydroxide as a base. These nanoribbons were characterized using transmission electron microscopy (TEM), elemental analysis, and polarized optical microscopy. The photophysical properties in solution phase were also studied. The synthesis procedure developed here will have a great promise in large-scale manufacturing. Different shapes of PDI-dimethyl nanostructures, such as nanorods, nanochains, and nanoparticles, were discovered while varying the base concentrations. Also the morphologies of these PDI nanostructures were studied using TEM. Future studies will focus on optimizing procedures of PDI-dimethyl nanostructures and exploring new derivatives like perylenediimide dimer functionalized silsesquioxane polymers.
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Brown, Treva T. "Fabrication and Characterization of Intricate Nanostructures." ScholarWorks@UNO, 2017. https://scholarworks.uno.edu/td/2399.

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Encapsulation of nanoparticles within hexaniobate nanoscrolls presents interesting advances in the formation of nanocomposites exhibiting unique multi-dimensional properties. Building upon previous successes, facile yet versatile wet-chemical and microwave-irradiation synthetic protocols for the fabrication of a series of hexaniobate composites are presented herein. Solvothermal and, more recently, microwave-assisted methods have been developed that allow for the fabrication of peapod-like structures. During solvothermal treatment, exfoliated hexaniobate nanosheets scroll around highly ordered chains of preformed nanoparticles (NPs) to produce nanopeapods (NPPs). This approach offers versatility and high yields, in addition to the potential for advanced functional device fabrication. For the characterization of these materials, advanced techniques in atomic force microscopy (AFM) were used for investigating the surface of materials at the nanometer scale. Extensive physical, dynamic, and force modulation studies were performed on novel oxide nanocomposites by implementing particular scanning techniques to determine information such as topology, stress-induced behavior at the nanoscale, magnetic behavior, and frictional forces of the nanoscale materials. These composites were then analyzed by topological intermittent contact studies in tapping and contact mode, as well as with derivative techniques of these commonly used scanning probe approaches. In addition to studying surfaces using conventional modes of AFM, the mechanical properties of these nanocomposites were measured via dynamic lateral force modulation (DLFM) and magnetic properties of functionalized magnetic nanosheets were mapped via magnetic sampling modulation (MSM). By utilizing the capabilities of the DLFM imaging mode, elastic properties such as Young’s Modulus were measured from force-distance curves. In addition to this modulation mode, MSM was used to selectively map the vibrating magnetic nanomaterials from a modulated electromagnetic field. The information obtained from these AFM techniques can be helpful in determining the relative structural behavior of these nanocomposites and gauge their use in various applications such as structural engineering of nanoarchitectures as well as studying magnetic characteristics of metal oxide nanocomposites that exhibit characteristics different from their bulk counterparts.
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Chan, Hung-tat, and 陳鴻達. "Synthesis of photosensitizing molecules and fabrication of inorganic nanostructures for dye-sensitized solar cell." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B47849344.

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Dye-sensitized solar cells (DSSC) have drawn much attention due to their higher versatility and lower production cost compared to inorganic photovoltaics. The top performers of DSSC have achieved power conversion efficiency over 10%, which is comparable to amorphous silicon solar cells. In this work, new photosensitizers and nanostructure for improving the photovoltaic performance of DSSC were developed and evaluated. Two series of cyclometalated ruthenium(II) complex photosensitizer were presented and their photosensitizing properties in DSSC were studied. Eight cyclometalated ruthenium(II) terpyridine complexes with three carboxylic acid groups on the terpyridine ligand were synthesized. Series A (M1 to M4) consist of C,N,N’ ligands substituted with phenyl group whereas series B (M5 to M8) consist of C,N,N’ ligands substituted with m-fluorophenyl group. All of the complexes exhibited broad aborption spectra covering the whole visible spectrum. The complexes in series B generally showed better photovoltaic performance than those in series A in the DSSCs. DSSC fabricated from M7 achieved the highest Voc, Jsc and power conversion efficiency among other DSSC, which were 0.56 V, 7.30 mAcm-2 and 2.63 % respectively. Truxene-core donor--acceptor dyes were presented and their photosensitizing properties in DSSC were studied. Eight dyes with either one donor two acceptors system (T2, B2, T2R and B2R) or two donor one acceptor system (T1, B1, T1R and B1R) were synthesized. Dyes with two acceptors have high molar extinction coefficients originated from the charge-transfer transition band, which are almost two times higher than those with only one accceptors. Both the enhanced absorption and better anchoring geometry on TiO2 contribute to the better photovoltaic performance of the two acceptors dyes in the DSSCs. Devices fabricated from B2 and volatile solvent electrolyte exhibited the best photovoltaic performance among the truxene-core dyes. The Voc, Jsc, FF and power conversion efficiency of the device were 0.59 V, 9.69 mAcm-2, 0.63 and 3.62 % respectively. Dyes based on cyanoacrylic acid anchoring groups (T1, T2, B1 and B2) were found to perform better than those based on rhodanine-3-acetic acid dyes (T1R, T2R, B1R and B2R) in both donor--acceptor configurations. ITO nanorod/TiO2 nanoparticle composite films with the three different types of ITO nanorod with different length (150 nm, 600 nm and 1.5 μm) were fabricated on FTO glass substrate. The transmittance and sheet resistance of the ITO nanorod array on the FTO glass substrate were found decreased with increasing the length of the ITO nanorod. When the ITO nanorod/TiO2 nanoparticle composite films were applied as the anode in DSSCs, the device fabricated from 600 nm ITO nanorod with TiO2 ‘double layer‘ film showed enhanced photocurrent generation. The improved photocurrent generation is suggested to be due to an improved charge collection efficiency at the ITO nanorod back electrode.
published_or_final_version
Chemistry
Doctoral
Doctor of Philosophy
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Dolcet, Paolo. "Synthesis and Chemico-Physical and Structural Characterization of Nanocrystalline Inorganic Materials obtained via Miniemulsions." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423646.

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In this PhD thesis, several inorganic nanostructures were synthesized through a wetchemistry synthetic route. In particular, the miniemulsion approach was exploited to induce the formation in confined space of pure and doped binary (oxides, sulfides and fluorides) and ternary (hydroxides) compounds, of metal/oxide nanocomposites and of hybrid organic/inorganic nanoparticles. Through this methodology, the investigated systems were obtained in crystalline form already at room temperature. Various miniemulsion formulations were used to control the size and morphology of the investigated systems, achieving different emulsion stabilities and yields of crystalline powders. The obtained materials were thoroughly characterized through a wide array of techniques from the compositional, structural and functional points of view. In particular, XRD (X-Ray Diffraction) was employed to assess the formation of crystalline materials and to calculate average crystallite sizes (through Rietveld refinement), and the data thus obtained were compared with micrographs collected through TEM (Transmission Electron Microscopy). This latter microscopy, coupled with SEM (Scanning Electron Microscopy), was also used to investigate the morphology of the synthesized nanostructures. In addition, the surface composition was explored through XPS (X-ray Photoelectron Spectroscopy) and, especially in the case of systems doped with transition metal or lanthanide ions, atomic ratios were compared to those obtained through ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectroscopy) or ICP-MS (Inductively Coupled Plasma-Mass Spectroscopy). TGA-DSC (ThermoGravimetric Analysis-Differential Scanning Calorimetry) allowed to evaluate the presence and amount of residual surfactant moieties adsorbed on the materials surfaces. In the case of the doped systems, XAS (X-ray Absorption Spectroscopy) measurements were performed in order to study in detail the local structure of the doping ions, also with respect to the hosting matrices. The obtained data were further correlated to the photoluminescence properties. These materials, also due to the biocompatibility of the selected matrices, might indeed be potentially applied for optical bioimaging. At this regard, cytotoxicity and cell viability assays were also performed on selected systems.
In questa tesi di dottorato, diverse nanostrutture inorganiche sono state sintetizzate mediante un approccio sintetico per via umida. In particolare, l’approccio della miniemulsione è stato sfruttato per indurre la formazione in spazio confinato di composti binari (ossidi, solfuri e fluoruri) e ternari (idrossidi), sia in forma pura che drogati, e di nanocompositi metallo/ossido e nanoparticelle ibride organiche/inorganiche. Attraverso questa metodologia, i sistemi investigati sono stati ottenuti in forma cristallina già a temperatura ambiente. Miniemulsioni con varie formulazioni sono state usate per controllare le dimensioni e la morfologia dei sistemi investigati, ottenendo emulsioni con stabilità differenti e diversa resa in termini di prodotti cristallini. I materiali ottenuti sono stati caratterizzati in dettaglio attraverso numerose tecniche, sia dal punto di vista composizionale che da quello strutturare e funzionale. In particolare, l’XRD (X-Ray Diffraction) è stato utilizzato per valutare la formazione di materiali cristallini e, attraverso rifinimento Rietveld, calcolare le dimensioni medie dei cristalliti; i dati così ottenuti sono stati confrontati con le micrografie TEM (Transmission Electron Microscopy). Quest’ultima microscopia, affiancata al SEM (Scanning Electron Microscopy), è stata anche utilizzata per investigare la morfologia delle nanostrutture sintetizzate. In aggiunta, la composizione superficiale è stata esplorata attraverso XPS (X-ray Photoelectron Spectroscopy) e, specialmente nel caso dei sistemi drogati con ioni di metalli di transizione o lantanidi, i rapporti molari registrati sono stati confrontati con quelli ottenuti attraverso ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectroscopy) o ICP-MS (Inductively Coupled Plasma-Mass Spectroscopy). Analisi TGA-DSC (ThermoGravimetric Analysis-Differential Scanning Calorimetry) hanno invece permesso di valutare la presenza e la quantità di residui di tensioattivi adsorbiti sulla superficie del materiale. Nel caso dei sistemi drogati, sono state effettuate misure XAS (X-ray Absorption Spectroscopy) al fine di studiare in dettaglio la struttura locale intorno agli ioni droganti, in relazione alle matrici ospitanti. I dati così ottenuti sono stati inoltre correlati con le proprietà di fotoluminescenza. Questi materiali, anche grazie alla biocompatibilità delle matrici selezionate, potrebbero potenzialmente essere utilizzati nel campo del bioimaging ottico. A questo riguardo sono state quindi effettuate prove di citotossicità e di influenza sulla vitalità cellulare su alcuni dei sistemi sintetizzati.
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James, Derak. "New approaches to chalcogenide materials for thermoelectrics| Lead telluride-based nanostructures and facile synthesis of tetrahedrite and doped derivatives." Thesis, Wayne State University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3735125.

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The overall purpose of this work is to address several of the roadblocks to use of thermoelectric materials for generation of electricity, namely inefficient processing of materials and low performance, commonly rated by the figure of merit, ZT=T?2?/?tot. The ZT includes ? as the Seebeck coefficient, ? as electrical resistivity, T as the average temperature, and ?tot as total thermal conductivity. ?tot is the sum of electronic charge carrier (?C) and lattice (?L) contributions to thermal conductivity. Attempts to increase ZT in the literature to values >1 have focused on decreasing the thermal conductivity via nanostructuring or optimizing the electrical conductivity and Seebeck coefficient by doping. In this work, two separate approaches are taken to tackle these issues: (1) Target higher ZT by assembling lead telluride (PbTe) nanoparticles from a multi-gram synthesis utilizing ligand stripping techniques or deliberately including discrete lead sulfide (PbS) NCs. (2) Develop a rapid, convenient synthesis of tetrahedrite (Cu12Sb4S13). Approach (1): Nanostructuring of PbTe and PbTe?PbS. Nanostructured PbTe and nanocomposites of PbTe?PbS are hypothesized to increase ZT by lowering thermal conductivity, while ligand stripping of PbTe NCs by sulfide or iodide is expected to increase ZT because it has been demonstrated to increase electrical conductivity in thin films of PbS. A new synthesis is in demand because mixing PbTe and PbS NCs requires that the PbTe be dispersible, and literature syntheses of such NCs suffer from small yields (<200 mg). Thus, applications of dispersible PbTe NCs are largely limited to thin films. The ZT values of these thin films are not reported due to difficulty in quantifying thermal conductivity. In the dissertation research, nanostructured PbTe pellets are prepared by hot-pressing PbTe NCs after either mixing with PbS NCs by incipient wetness, or ligand stripping with sulfide salt, iodide salt, or both. The PbTe NCs themselves are prepared in multi-gram quantities by hot-injection methods in solution. The NCs are characterized for crystallinity by powder X-ray Diffraction (XRD). The size and morphology of the NCs are probed via Transmission Electron Microscopy (TEM), and their composition is determined by Energy Dispersive Spectroscopy (EDS). The thermoelectric properties are studied on hot-pressed pellets of each sample. Approach (2): Developing a facile route to tetrahedrite and doped derivatives. Tetrahedrite is exciting the thermoelectric community due to its lack of rare or toxic elements, the tunability of its electronic properties by doping, the ability to dope by ball-milling with the plentiful natural mineral, and the ability to achieve a ZT of unity. However, the natural mineral is unsuitable on its own due to an excess of natural dopant, and reported tetrahedrite syntheses require heating at high temperature 650 ?C in a three day process followed by two weeks of heating at 450 ?C. This work establishes a new synthesis amenable to industrial production that reduces the heating time from over 2 weeks to 2 days for simultaneous batch production at moderate temperature (155 ?C for one day and 430 ?C for 30 min, cooling naturally). The tetrahedrite powder is prepared from chloride-free metal salts and thiourea by solvothermal methods and characterized by XRD for crystallinity. The composition is determined by Inductively Coupled Plasma analysis. Products from multiple batches are mixed by ball-milling alone or combined with the natural mineral as a means to dope with Zn2+ as a solid solution. The resulting powder is then hot-pressed to pellet form for thermoelectric characterization. The tetrahedrite is also doped in-situ by zinc over a range of 0.79 to 1.40 mol equivalents using chloride-free metal salts.

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Adireddy, Shivaprasad Reddy. "High Yield Solvothermal Synthesis of Hexaniobate Based Nanocomposites via the Capture of Preformed Nanoparticles in Scrolled Nanosheets." ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1726.

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The ability to encapsulate linear nanoparticle (NP) chains in scrolled nanosheets is an important advance in the formation of nanocomposites.These nanopeapods (NPPs) exhibit interesting properties that may not be achieved by individual entities. Consequently, to fully exploit the potential of NPPs, the fabrication of NPPs must focus on producing composites with unique combinations of morphologically uniform nanomaterials. Various methods can produce NPPs, but expanding these methods to a wide variety of material combinations can be difficult. Recent work in our group has resulted in the in situ formation of peapod-like structures based on chains of cobalt NPs. Building on this initial success, a more versatile approach has been developed that allows for the capture of a series of preformed NPs in NPP composites. In the following chapters, various synthetic approaches for NPPs of various material combinations will be presented and the key roles of various reaction parameters will be discussed. Also, uniform hexaniobate nanoscrolls were fabricated via a solvothermal method induced by heating up a mixture of TBAOH, hexaniobate crystallites, and oleylamine in toluene. The interlayer spacing of the nanoscrolls was easily tuned by varying the relative amount and chain lengths of the primary alkylamines. To fabricate NPPs, as-synthesized NPs were treated with hexaniobate crystallite in organic mixtures via solvothermal method. During solvothermal treatment, exfoliated hexaniobate nanosheets scroll around highly ordered chains of NPs to produce the target NPP structures in high yield. Reaction mixtures were held at an aging temperature for a few hours to fabricate various new NPPs (Fe3O4@hexaniobate, Ag@hexaniobate, Au@hexaniobate, Au-Fe3O4@hexaniobate, TiO2@hexaniobate, CdS@hexaniobate, CdSe@hexaniobate, and ZnS@hexaniobate). This versatile method was first developed for the fabrication of magnetic peapod nanocomposites with preformed nanoparticles (NPs). This approach is effectively demonstrated on a series of ferrite NPs (≤ 14 nm) where Fe3O4@hexaniobate NPPs are rapidly (~ 6 h) generated in high yield. When NP samples with different sizes are reacted, clear evidence for size selectivity is seen. Magnetic dipolar interactions between ferrite NPs within the Fe3O4@hexaniobate samples leads to a significant rise in coercivity, increasing almost four-fold relative to free particles. Other magnetic ferrites NPPs, MFe2O4@hexaniobate (M = Mn, Co, Ni), can also be prepared. This synthetic approach to nanopeapods is quite versatile and should be readily extendable to other, non-ferrite NPs or NP combinations so that cooperative properties can be exploited while the integrity of the NP assemblies is maintained. Further, this approach demonstrated selectivity by encapsulating NPs according to their size. The use of polydispersed NP systems is also possible and in this case, evidence for size and shape selectivity was observed. This behavior is significant in that it could be exploited in the purification of inhomogeneous NP samples. Other composite materials containing silver and gold NPs are accessible. Partially filled Fe3O4@hexaniobate NPPs were used as templates for the in situ growth of gold to produce the bi-functional Au- Fe3O4@hexaniobate NPPs. Encapsulation of Ag and Au NP chains with a hexaniobate nanoscroll was shifted the surface plasmon resonance to higher wavelengths. In these composites NPs can be incorporated to form NPP structures, decorated on nanosheets before scrolling, or attached to the surfaces of the nanoscrolls. The importance of this advancement is the promise it holds for the design and assembly of active nanocomposites. One can create important combinations of nanomaterials for potential applications in a variety of areas including catalysis, solar conversion, thermoelectrics, and multiferroics.
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9

Chen, Rong, and 陳嶸. "Synthesis, characterization and biological applications of inorganic nanomaterials." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B36840907.

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Bassett, David. "Synthesis and applications of bioinspired inorganic nanostructured materials." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97064.

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Although the study of biominerals may be traced back many centuries, it is only recently that biological principles have been applied to synthetic systems in processes termed "biomimetic" and "bioinspired" to yield materials syntheses that are otherwise not possible and may also reduce the expenditure of energy and/or eliminate toxic byproducts. Many investigators have taken inspiration from interesting and unusual minerals formed by organisms, in a process termed biomineralisation, to tailor the nanostructure of inorganic materials not necessarily found biogenically. However, the fields of nanoparticle synthesis and biomineralisation remain largely separate, and this thesis is an attempt to apply new studies on biomineralisation to nanomaterials science.Principally among the proteins that influence biomineralisation is a group comprised largely of negatively charged aspartic acid residues present in serum. This study is an investigation determining the ability of these serum proteins and other anolagous biomolecules to stabilise biologically relevant amorphous minerals and influence the formation of a variety of materials at the nanoscale. Three different materials were chosen to demonstrate this effect; gold was templated into nanosized single crystals by the action of bioorganic molecules, and the utility of these nanoparticles as a biosensor was explored. The influence of bioorganic molecules on the phase selection and crystal size restriction of titanium dioxide, an important semiconductor with many applications, was explored. The use of bioorganically derived nanoparticles of titanium dioxide was then demonstrated as a highly efficient photocatalyst. Finally, calcium carbonate, a prevalent biomineral was shown to form highly ordered structures over a variety of length scales and different crystalline polymorphs under the influence of a templating protein. In addition, an alternative route to producing calcium phosphate nanoparticle dispersions by mechanical filtration was explored and use as a transfection vector was optimised in two cell lines.Several significant achievements are presented: (i) the assessment of the relative ability of serum, serum derived proteins and their analogues to stabilize the amorphous state, (ii) the formation of single crystalline gold templated by an antibody, (iii) the formation of highly photocatalytically active nanoparticulate anatase by a phosphorylated cyclic esther, (iv) the formation of conical structures at the air liquid interface by the templating ability of a protein and (v) the optimisation of calcium phosphate nanoparticle mediated transfection in two cell lines by mechanical filtration.
Malgré le fait que l'étude des biomatériaux remonte à plusieurs siècles, ce n'est que récemment que des principes biologiques furent appliqués à des systèmes synthétiques dans des procédés de "biomimetic" et "bioinspirés", permettant ainsi de nouveaux matériaux de synthèses tout en réduisant l'expansion d'énergie et/ou d'éliminer les résultantes toxiques. Plusieurs chercheurs se sont inspirés des formes inusuelles dès plus intéressantes créées par des organismes, formés par un procédé de biominéralisation, qui modifie la nanostructure des matériaux synthétiques. Toutefois, les champs d'études des synthèses de nanoparticules et de la biominéralisation demeurent grandement à part, et cette thèse tente d'appliquer de nouvelles études de biominéralisation par rapport à la science des nanomatériaux.Les protéines sériques qui influencent la biominéralisation sont chargées négativement de résidus d'aspartate. Cette recherche déterminera l'habileté de ces protéines et des diverses molécules bio–organiques qui stabilisent biologiquement d'important minéraux aux multiples formes qui influencent la formation de matériaux non biogènes sur une nano échelle; l'or et le dioxyde de titane ont permis de démontrer ce résultat. L'or fut transformé en nanoparticules de cristal par l'action des protéines sériques, et c'est l'utilité de ces nanoparticules en tant que biocapteurs qui fut explorée. L'influence des molécules bios-organiques sur le choix de la phase ainsi que sur la restriction de la grosseur du cristal de dioxyde de titane, un important semi-conducteur dans plusieurs applications, fut explorée. Les nanoparticules dérivant bio-organiquement du dioxyde de titane ont dès lors démontrées leur action hautement efficace comme photo catalyseur. Le carbonate de calcium, un biominéral commun, a su démontré sa capacité à auto-former des structures à multiples échelles ainsi que différents polymorphes cristallins sous l'influence d'une protéine modèle. De plus, la manipulation des structures à former divers arrangements est une variable qui fut démontrée. Finalement, la stabilité des nanoparticules du phosphate de calcium à se disperser dans le sérum de culture fut modifiée afin d'optimiser l'efficacité du transfert dans deux lignes de cellules.Plusieurs grandes recherches ont accomplis de façon significative; (i) l'évaluation de l'habileté relative du sérum, le dérivé des protéines sériques et de leur capacité à stabiliser les phases de leurs multiples formes, (ii) la formation simple cristalline de l'or former par un anticorps, (iii) la formation de nanoparticules très actives photocatalytiquement d'anatase formées par un ester cyclique phosphorylée, (iv) la formation de structures coniques à l'interface air liquide par la capacité de gabarits d'une protéine, (iv) l'optimisation de transfection médiation par des nanoparticules de phosphate de calcium dans deux lignées cellulaires par filtration méchanique.
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Books on the topic "Inorganic Nanostructures - Synthesis"

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Cao, Huaqiang. Synthesis and Applications of Inorganic Nanostructures. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527698158.

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Rao, C. N. R. Essentials of inorganic materials synthesis. Hoboken, New Jersey: Wiley, 2014.

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Berridge, Timothy Edward. The synthesis and characterisation of hybrid nanostructures containing both organic and inorganic regions. Birmingham: University of Birmingham, 1998.

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Alain, Tressaud, ed. Functionalized inorganic fluorides: Synthesis, characterization & properties of nanostructured solids. Hoboken, N.J: Wiley, 2010.

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Sohn, Hong Yong. Chemical vapor synthesis of inorganic nanopowders. Hauppauge, N.Y: Nova Science Publishers, 2011.

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Aresta, M., and Angela Dibenedetto. Inorganic micro- and nanomaterials: Synthesis and characterization. Berlin: Walter de Gruyter GmbH & Co. KG, 2013.

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Nicola, Hüsing, ed. Synthesis of inorganic materials. Weinheim: Wiley-VCH, 2000.

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Eduardo, Ruiz-Hitzky, Ariga Katsuhiko 1962-, and Lvov Yuri 1952-, eds. Bio-inorganic hybrid nanomaterials: Strategies, syntheses, characterization and applications. Weinheim: Wiley-VCH, 2008.

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Winterer, Markus. Nanocrystalline Ceramics: Synthesis and Structure. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002.

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Nazario, Martin, ed. Carbon nanotubes and related structures: Synthesis, characterization, functionalization, and applications. Weinheim: Wiley-VCH, 2010.

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Book chapters on the topic "Inorganic Nanostructures - Synthesis"

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Xu, Xuemei, Pia Winterwerber, David Ng, and Yuzhou Wu. "DNA-Programmed Chemical Synthesis of Polymers and Inorganic Nanomaterials." In DNA Nanotechnology, 57–81. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-54806-3_3.

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Abstract DNA nanotechnology, based on sequence-specific DNA recognition, could allow programmed self-assembly of sophisticated nanostructures with molecular precision. Extension of this technique to the preparation of broader types of nanomaterials would significantly improve nanofabrication technique to lower nanometer scale and even achieve single molecule operation. Using such exquisite DNA nanostructures as templates, chemical synthesis of polymer and inorganic nanomaterials could also be programmed with unprecedented accuracy and flexibility. This review summarizes recent advances in the synthesis and assembly of polymer and inorganic nanomaterials using DNA nanostructures as templates, and discusses the current challenges and future outlook of DNA templated nanotechnology.
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Liu, Jian-Wei. "Synthesis of One-Dimensional Te Nanostructures." In Well-Organized Inorganic Nanowire Films, 33–37. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3947-8_2.

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Bourlinos, A. B., N. Boukos, and D. Petridis. "Shape Fabrication of Cotton-Derived Inorganic Hollow Ribbons." In Nanostructures: Synthesis, Functional Properties and Applications, 111–16. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-007-1019-1_5.

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Antonoglou, Orestis, and Catherine Dendrinou-Samara. "CHAPTER 3. Polyols as a Toolbox for the Preparation of Inorganic-based Nanostructures." In Reducing Agents in Colloidal Nanoparticle Synthesis, 51–72. Cambridge: Royal Society of Chemistry, 2021. http://dx.doi.org/10.1039/9781839163623-00051.

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Gross, Silvia. "Sustainable and Very-Low-Temperature Wet-Chemistry Routes for the Synthesis of Crystalline Inorganic Nanostructures." In Green Processes for Nanotechnology, 1–33. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15461-9_1.

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Ramm, Beatrice, Alena Khmelinskaia, Henri G. Franquelim, and Petra Schwille. "Patterning DNA Origami on Membranes Through Protein Self-Organization." In Natural Computing Series, 411–31. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-9891-1_22.

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AbstractSpatial organization on the atomic scale is one of the key objectives of nanotechnology. The development of DNA nanotechnology is a hallmark of material programmability in 2D and 3D, in which the large variety of available DNA modifications allows it to be interfaced with a number of inorganic and organic materials. Nature’s solution to spatiotemporal control has been the evolution of self-organizing protein systems capable of pattern formation through energy dissipation. Here, we show that combining DNA origami with a minimal micron-scale pattern-forming system vastly expands the applicability of DNA nanotechnology, whether for the development of biocompatible materials or as an essential step toward building synthetic cells from the bottom up. We first describe the interaction of DNA origami nanostructures with model lipid membranes and introduce the self-organizing MinDE protein system from Escherichia coli. We then outline how we used DNA origami to elucidate diffusiophoresis on membranes through MinDE protein pattern formation. We describe how this novel biological transport mechanism can, in turn, be harnessed to pattern DNA origami nanostructures on the micron scale on lipid membranes. Finally, we discuss how our approach could be used to create the next generation of hybrid materials, through cargo delivery and multiscale molecular patterning capabilities.
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Sumanth Kumar, D., B. Jai Kumar, and H. M. Mahesh. "Quantum Nanostructures (QDs): An Overview." In Synthesis of Inorganic Nanomaterials, 59–88. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-08-101975-7.00003-8.

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Ashik, U. P. M., Shinji Kudo, and Jun-ichiro Hayashi. "An Overview of Metal Oxide Nanostructures." In Synthesis of Inorganic Nanomaterials, 19–57. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-08-101975-7.00002-6.

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Qi, Limin. "Reverse Micelles: Synthesis of Inorganic Nanostructures." In Encyclopedia of Surface and Colloid Science, Third Edition, 6451–74. Taylor & Francis, 2015. http://dx.doi.org/10.1081/e-escs3-120023694.

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Thankachan, Rahul M., and Raneesh Balakrishnan. "Synthesis Strategies of Single-Phase and Composite Multiferroic Nanostructures." In Synthesis of Inorganic Nanomaterials, 185–211. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-08-101975-7.00008-7.

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Conference papers on the topic "Inorganic Nanostructures - Synthesis"

1

BAVASSO, IRENE, FRANCESCA SBARDELLA, MARIA PAOLA BRACCIALE, JACOPO TIRILLÒ, LUCA DI PALMA, LUCA LAMPANI, and FABRIZIO SARASINI. "HIERARCHICAL ELECTROSPUN VEILS AS POTENTIAL TOUGHENING MATERIALS FOR STRUCTURAL COMPOSITE LAMINATES." In Thirty-sixth Technical Conference. Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/asc36/35780.

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The use of fiber reinforced polymers (FRPs) as a replacement of traditional homogeneous materials is still hindered by their brittle behavior and poor interlaminar resistance. Interleaving veils in polymer matrix, especially with fibers at the nanoscale dimension, is considered as one of the most promising toughening methods. By considering the hierarchical nature of the resulting laminated composites, their properties are intrinsically dependent on the interaction between the nanofibrous veils and the thermosetting resin and, in an attempt to tailor the interfacial adhesion between the electrospun fibers and matrix, surface modification of the fibers with the integration of inorganic nanostructures could be a solution. This work is an investigation on the use of commercially available electrospun nylon nanofibers decorated with ZnO nanorods obtained by three-step chemical synthesis. The modified veils were interleaved in carbon/epoxy prepreg composites and their mechanical properties were evaluated under Low Velocity Impact (LVI) tests at different energy levels (5 J and 7.5 J). Although the presence of ZnO nanorods did not limit the extension of the delaminated area in case of high energy level test (7.5 J), nanomaterials contributed positively to reduce the extent of the damaged area when a low energy impact was adopted (5 J). A beneficial effect of ZnO-functionalized commercial electrospun veils was observed in the flexural strength of laminated composites. After LVI tests at 5 J and 7.5 J, the flexural strength resulted higher compared to that observed in the same tests on specimens with non-decorated veils (NY4M), thus suggesting a positive role played by ZnO nanorods in hindering delamination propagation.
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Ravi, B. G., S. Sampath, R. Gambino, P. S. Devi, and J. B. Parise. "Plasma Spray Synthesis from Precursors: Progress, Issues and Considerations." In ITSC2006, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, R. S. Lima, and J. Voyer. ASM International, 2006. http://dx.doi.org/10.31399/asm.cp.itsc2006p0871.

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Abstract Precursor plasma spray synthesis is an innovative and rapid method to make functional oxide ceramic coatings by starting from solution precursors and directly producing inorganic films. This emerging method, utilizes molecularly mixed precursor liquids, which essentially avoids the handling and selection of powders, opening up new avenues for developing compositionally complex functional oxide coatings. Precursor plasma spray also offers excellent opportunities in exploring the non-equilibrium phase evolution during plasma spraying of multi-component oxides from inorganic precursors. Although there have been efforts in this area since the 1980s and early 1990s with the goal of synthesizing nanoparticles, only recently has the work progressed in the area of functional systems. At the Center for Thermal Spray Research an integrated investigative strategy has been conducted to explore the benefits and limits of this synthesis strategy. Water and alcohol based sol/solution precursors derived from various chemical synthesis methods were used as feedstocks to deposit thin/thick films of spherical and nanostructured coatings of yttrium aluminum garnet (YAG), yttrium iron garnet (YIG), lanthanum strontium manganite (LSM) and Zr-substituted yttrium titanates, compositions of Y2O3-Al2O3 and their microstructural space centered around stochiometric YAG. A detailed discussion of the salient features of RF induction plasma spraying (RFPPS) approach, results obtained in the investigations to develop various functional oxide coatings and process issues and challenges are presented.
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