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Готові списки джерел за темами / ZnO nanocomposite / Дисертації

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Дисертації з теми "ZnO nanocomposite"

Автор: Grafiati

Опубліковано: 28 травня 2022

Оновлено: 31 липня 2025

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1

Edakkara, A. J., J. J. Mathen, J. Sebastian, G. Ramalingam, and G. P. Joseph. "Electrical Behaviour of Polyethylene Vinyl Acetate / ZnO Nanocomposite." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35634.

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Recently, nanoscale materials have attracted material scientists because of their unique size depend-ent magnetic, optical, electrical and thermal properties. Homogeneous dispersion of nanoparticles in the polymer matrix and control of their size are vital to achieve many of these properties. In the present work, Zinc Oxide (ZnO) nanoparticles were prepared by solvothermal route. Chemical replacement reaction was chosen for the homogeneous dispersion of prepared ZnO nanoparticles into polymer matrix. Zinc oxide is an inorganic material with a large direct band gap (3.34 eV), high exciton bindi

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2

GONCALVES, MARIO SERGIO SANT ANNA. "ASPECTS OF SYNTHESIS BY PREFERENTIAL REDUCTION AND CHARACTERIZATION OF CO-ZNO NANOCOMPOSITE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7360@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>O trabalho aborda a elaboração do compósito Co-ZnO por redução preferencial com hidrogênio. Inicialmente foi desenvolvida uma avaliação termodinâmica das principais reações para o processo tais como, a pirólise dos nitratos de cobalto e de zinco, responsável pela obtenção dos respectivos óxidos, e a redução destes pelo hidrogênio. O estudo expe rimental foi realizado de forma a se avaliar o efeito de variáveis importantes (fluxo, temperatura e pressão parcial do gás reagente) sobre a cinética das reações de redução. Observ

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3

Chamorro, Coral William. "Microstructure, chemistry and optical properties in ZnO and ZnO-Au nanocomposite thin films grown by DC-reactive magnetron co-sputtering." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0253/document.

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Les matériaux composites peuvent présenter des propriétés qu'aucun des composants individuels ne présente. En outre, à l'échelle du nanomètre les nanocomposites peuvent présenter de nouvelles propriétés par rapport à l'état massif ou à des macrocomposites des mêmes composants en raison d’effets de confinement et d’effets quantiques liés à la taille. Les nanocomposites semi-conducteur/métal sont très intéressants en raison de leurs uniques propriétés catalytiques et opto-électroniques et la possibilité de les ajuster facilement. Ce travail de thèse étudie les interactions spécifiques et les pro

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4

Olenych, I. B., O. I. Aksimentyeva, and Yu Yu Horbenko. "Electrical Properties of Hybrid Composites Based on Poly(3,4-ethylenedioxythiophene) with ZnO and Porous Silicon Nanoparticles." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42552.

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The electrical properties of hybrid nanosystem based on poly(3,4 ethylenedioxythiophene) with ZnO and porous silicon nanoparticles were studied by the methods of current-voltage characteristics and thermally stimulated conductivity. The dependence of electrical parameters of hybrid films on their composition has been found. The analysis of the temperature dependences of the composites conductivity in the temperature range of 80-330 К indicates the activation character of charge transfer and presence the trapping of unequilibrium carriers at the porous silicon and ZnO nanoparticle – polymer int

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5

Beal, Russell Joseph. "Effects of Nanoassembly on the Optoelectronic Properties of CdTe - ZnO Nanocomposite Thin Films for Use in Photovoltaic Devices." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/283601.

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Quantum-scale semiconductors embedded in an electrically-active matrix have the potential to improve photovoltaic (PV) device power conversion efficiencies by allowing the solar spectral absorption and photocarrier transport properties to be tuned through the control of short and long range structure. In the present work, the effects of phase assembly on quantum confinement effects and carrier transport were investigated in CdTe - ZnO nanocomposite thin films for use as a spectrally sensitized n-type heterojunction element. The nanocomposites were deposited via a dual-source, sequential radi

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6

Chamorro, Coral William Adolfo Verfasser], and Frank [Akademischer Betreuer] [Mücklich. "Microstructure, chemistry and optical properties in ZnO and ZnO-Au nanocomposite thin films grown by DC-reactive magnetron co-sputtering / William Adolfo Chamorro Coral ; Betreuer: Frank Mücklich." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2015. http://d-nb.info/1136608052/34.

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7

Olson, Grant T. "Improving Hybrid Solar Cells: Overcoming Charge Extraction Issues In Bulk Mixtures of Polythiophenes and Zinc Oxide Nanostructures." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1257.

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Анотація:

Organic photovoltaics (OPVs) have received a great deal of focus in recent years as a possible alternative to expensive silicon based solar technology. Current challenges for organic photovoltaics are centered around improving their lifetimes and increasing their power conversion efficiencies. One approach to improving the lifetime of such devices has been the inclusion of inorganic metal oxide layers, but interaction between the metal oxides and common conjugated polymers is not favorable. Here we present two methods by which the interactions between polythiophenes and nanostructured ZnO can

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8

Beigbeder, Joana. "Etudes des propriétés physiques de nanocomposites à matrice polysiloxane : application au développement d'un revêtement de contrôle thermique froid et antistatique." Toulouse 3, 2009. http://thesesups.ups-tlse.fr/702/.

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Les réflecteurs solaires sont des revêtements de contrôle thermique froids développés par le CNES. Ils sont constitués d'un substrat réflecteur sur lequel est déposée une couche transparente de résine polysiloxane (PDMS). Le PDMS est un polymère, sensible aux décharges électrostatiques (ESD) se produisant en orbite géostationnaire. L'objectif de ce travail est de développer un revêtement de contrôle thermique froid et antistatique, afin d'écouler les charges électrostatiques en orbite géostationnaire. Les propriétés thermo-optiques du revêtement développé pour les orbites basses doivent être c

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9

Byl, Céline. "Synthèse et caractérisation de nanocomposites à base de ZnO pour des applications thermoélectriques." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112045/document.

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Ce travail de thèse a pour objectif l’obtention de nanocomposites denses ZnO/SiO2 afin d’améliorer les propriétés thermoélectriques de l’oxyde de zinc. Ce manuscrit décrit différents aspects de l’élaboration tant en terme de synthèse que de densification de nanocomposites ZnO/SiO2 ainsi que leur caractérisation. Afin d’obtenir des nanoparticules en grande quantité, de bonne cristallinité et de taille inférieure à 10 nm, l’optimisation d’une synthèse par voie polyol en jouant sur différents paramètres (pH, température, taux d’hydrolyse, solvant, surfactant) a été réalisée. Nous avons pu mettre

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10

Hébert, Christian. "Films minces nanocomposites ZnxFe1-xO1+δ : phases wurtzite, sel gemme et spinelle". Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066068/document.

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Cette thèse porte sur la croissance de films minces d’oxydes de zinc/fer (ZnxFe1-xO1+δ par ablation laser pulsée (PLD) et sur la possibilité de contrôler leurs propriétés structurales et physico-chimiques en variant les conditions d’élaboration : pression d’oxygène et température de croissance, proportions respectives de zinc/fer. Pour de fortes valeurs de x (x > 65%), les films sont monophasés de structure wurtzite type ZnO (films Fe:ZnO), avec une transparence optique dans la gamme UV-visible de 80% mais sans propriété ferromagnétique ; en fonction de leur teneur en fer (1-x), ils évoluen

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11

Круш, А. М. "Дослідження властивостей нанокомпозитів гідроксиапатиту легованих ZnO". Thesis, Cумський державний університет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/48935.

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Дослідження композитних матеріалів на основі гідроксиапатиту [Са10(РО4)6(ОН)2, ГА] з різними добавками є одним з головних напрямків в області створення біоматеріалів, в основному, щоб отримати якісні матеріали, придатні для використання в заміщенні кісткової тканини.

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12

Hébert, Christian. "Films minces nanocomposites ZnxFe1-xO1+δ : phases wurtzite, sel gemme et spinelle". Electronic Thesis or Diss., Paris 6, 2017. http://www.theses.fr/2017PA066068.

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Анотація:

Cette thèse porte sur la croissance de films minces d’oxydes de zinc/fer (ZnxFe1-xO1+δ par ablation laser pulsée (PLD) et sur la possibilité de contrôler leurs propriétés structurales et physico-chimiques en variant les conditions d’élaboration : pression d’oxygène et température de croissance, proportions respectives de zinc/fer. Pour de fortes valeurs de x (x > 65%), les films sont monophasés de structure wurtzite type ZnO (films Fe:ZnO), avec une transparence optique dans la gamme UV-visible de 80% mais sans propriété ferromagnétique ; en fonction de leur teneur en fer (1-x), ils évoluen

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13

Li, Shanghua. "Engineering nanomaterials with enhanced functionality." Licentiate thesis, KTH, Materials Science and Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3906.

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<p>This thesis deals with the engineering of novel nanomaterials, particularly nanocomposites and nanostructured surfaces with enhanced functionalities. The study includes two parts; in the first part, an in situ sol-gel polymerization approach is used for the synthesis of polymer-inorganic hybrid material and its exceptional transparent UV-shielding effect has been investigated. In the second part, electrodeposition process has been adapted to engineer surfaces and the boiling performance of the fabricated nanostructured surfaces is evaluated.</p><p>In the first part of the work, polymer-inor

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14

Salvador, Levehang Claudia. "Développement de membranes MOF nanocomposites à base de ZIF." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2014. http://www.theses.fr/2014ENCM0020.

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Les réseaux zéolithiques à base d'imidazolate (e.g. ZIF-8) sont des matériaux membranaires attractifs pour la séparation de gaz, sous réserve de pouvoir disposer de membranes de haute qualité, stables et reproductibles sur des supports industriels. Dans ce travail plusieurs stratégies ont été examinées pour développer des membranes nanocomposites à base de ZIF-8 confiné dans les macropores de supports céramiques tubulaires. Trois approches ont été comparées: i) croissance de germes, ii) croissance in situ et iii) conversion de ZnO. L'influence des paramètres de synthèse (formulation des soluti

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15

Dai, Prè Marta/M. "Nanocomposites for optical applications." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3422168.

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Nanotechnology is one of the most important fields in the last decades because novel material development involve chemistry, physics, the medicine and also engineering science. Nanomaterials exhibit size-dependent properties and large surface to volume ratio which can be exploited in a number of applications especially in the optical field. The main work presented here regards the synthesis of the nanocomposites using different methods, according to the desidered quality of the final material, the easiness and the industrial processability, the size control distribution and the homogeneous

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16

Li, Rui. "Plastic UV radiation protection operating by Stokes emission." Thesis, Brunel University, 2013. http://bura.brunel.ac.uk/handle/2438/12434.

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A range of inorganic nanoparticles/nanophosphors that act as ultraviolet radiation absorbers were characterised and assessed in this thesis. Iron doped lithium aluminate phosphor was synthesised using a solid state reaction and also by flame spray pyrolysis. The phosphors prepared by different synthesis methods were characterised to identify their crystal structures and morphologies. Downconverting photoluminescent properties of the phosphors both as pure powders and embedded in polypropylene by co-rotating twin screw extrusion are reported. Zinc oxide nanoparticles made by flame spray pyrolys

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17

Habis, Christelle. "Development of ZnO-FTO nanocomposites for the use in transparent conductive thin films." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0192.

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Cette thèse s'inscrit dans le cadre de développement de couches d'oxyde transparentes avec des techniques à faible cout, basées sur des matériaux non polluants permettant de fonctionnaliser des dispositifs opérationnels efficace, donc à haut rendement pour la production d'énergies renouvelables. Notre choix s'est porté plus particulièrement sur l'étude des couches TCO à base d'étain et dopés au fluor, F :SnO2, dénommées FTO pour « Fluor Tin Oxydes ». Les FTO sont des oxydes à large bande interdite, à l'instar du ZnO, TiO2, Al2O3, purs ou dopés. Ces couches possèdent en principe un facteur de d

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18

Hu, David. "Photocatalyseurs nanocomposites UCNP@SiO2@ZnO, activés par rayonnement proche infrarouge, pour la dépollution des eaux usées." Electronic Thesis or Diss., Sorbonne université, 2021. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2021SORUS017.pdf.

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Les photocatalyseurs tels que l’oxyde de zinc (ZnO) peuvent minéraliser les polluants organiques toxiques et persistants dans les eaux usées. Ils ne sont cependant pas efficients dans les eaux très contaminées, suite à la nécessité d’une activation par une lumière UV qui n’y pénètre que faiblement. Dans ce projet, il est envisagé de surmonter les limites des photocatalyseurs évoqués par le développement de composites UCNP@SiO2@ZnO : avec (i) UCNP un coeur d’upconversion LiYF4:Yb3+,Tm3+ ayant le rôle de produire in situ de l’UV sous une excitation proche IR, (ii) @SiO2 un enrobage de silice ult

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19

Doddapaneni, Venkatesh. "On the polymer-based nanocomposites for electrical switching applications." Doctoral thesis, KTH, Tillämpad fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202702.

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Recent research demonstrated that polymer based nanocomposites (PNCs) have been engineered in order to improve the arc interruption capability of the circuit breakers. PNCs are the combination of nano-sized inorganic nanoparticles (NPs) and polymers, opened up new developments in materials science and engineering applications. Inorganic NPs are selected based on their physical and chemical properties which could make multifunctional PNCs in order to interrupt the electrical arcs effectively. In particular, we presented the PNCs fabricated by using CuO, Fe3O4, ZnO and Au NPs in a poly (methyl m

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20

Modesto, Junior Olayr. "Caracterização e aplicação fotocatalítica de compósitos óxidos TiO2/CuO, TiO2/ZnO E TiO2/ZrO2 sintetizados pelos processos Sol-gel e Poliol. /." Bauru, 2018. http://hdl.handle.net/11449/158268.

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Orientador: Dayse Iara dos Santos<br>Resumo: O desenvolvimento de materiais cerâmicos é um campo de pesquisa cujos resultados são extremamente promissores para aplicações tecnológicas. Particularmente, no caso dos materiais nanoestruturados baseados no óxido titânio, observa-se grande potencial de aplicação em dispositivos optoeletrônicos, bem como, para processos de fotocatálise, visto que apresenta um bandgap direto de 3,2 eV. Além disso, o aperfeiçoamento das propriedades ópticas, por meio da interação entre óxidos de diferentes bandas eletrônicas, têm sido estudado por muitos autores. Por

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21

Smirnova, T. N., J. Stumpe, О. V. Sakhno, L. M. Kokhtych, and P. V. Yezhov. "Stimulated emission of CdSe/ZnS nanocrystals in polymer dfb structure obtained by holographic ordering of polymer nanocomposite." Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20586.

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22

Lopez, garcia Andres Jenaro. "Contribution à l'étude des propriétés piézoélectriques de nanofils de ZnO et de nanocomposites associés en vue d’une application à la conversion d’énergie mécanique à électrique." Thesis, Université Grenoble Alpes, 2022. http://www.theses.fr/2022GRALT043.

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Анотація:

Avec le développement croissant de réseaux sans fil de capteurs de faible puissance pour ce que l’on appelle l’Internet des objets, il est nécessaire de trouver des moyens efficaces d’assurer l’autonomie énergétique des nœuds de détection. Parmi les différentes solutions de récupération d’énergie, la conversion en énergie électrique de l’abondante énergie mécanique présente dans l’environnement est très prometteuse. Dans ce domaine de recherche émergent, les nanofils (NFs) de ZnO ont été fortement étudiés au cours de ces deux dernières décennies, à la fois en tant que tels, et intégrés dans de

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23

Oluwole, David O., Jonathan Britton, Philani Mashazi, and Tebello Nyokong. "Synthesis and photophysical properties of nanocomposites of aluminum tetrasulfonated phthalocyanine covalently linked to glutathione capped CdTe/CdS/ZnS quantum dots." Elsevier, 2015. http://hdl.handle.net/10962/d1020291.

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Aluminum tetrasulfonated phthalocyanine (ClAlTSPc) was covalently linked with different sizes of glutathione capped CdTe/CdS/ZnS quantum dots (QDs). The photophysical and Förster resonance energy transfer (FRET) properties of the nanoconjugates were investigated. The CdTe/CdS/ZnS(6.3) nanocomposite showed the highest enhancement in its photophysical properties while (CdTe/CdS/ZnS(3.2) nanocomposite showed the least. Highest FRET efficiency was observed in the linked CdTe/CdS/ZnS(6.3) nanocomposites at 93%. Hence, the combination of CdTe/CdS/ZnS with ClAlTSPc exhibited excellent photophysical p

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24

Mrabet, Driss. "Synthèse de matériaux nanocomposites par assemblage de nanoparticules métalliques (Au, Cu) et d'oxydes de métaux (TiO₂, ZrO₂) pour application en catalyse." Master's thesis, Université Laval, 2008. http://hdl.handle.net/20.500.11794/20597.

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Анотація:

Les nanoparticules de métaux supportés sont une large famille de catalyseurs dont l'effet synergétique entre le métal et support a été mis en évidence récemment dans de nombreux travaux. L'utilisation d'un support nanométrique, plutôt qu'un support conventionnel, permet d'amplifier l'effet de synergie. L'objectif de ce travail est d'étudier la synthèse de matériaux nanocomposites constitués de l'association de nanoparticules métalliques et de nanoparticules d'oxydes de métaux préalablement synthétisées, et d'évaluer leurs propriétés catalytiques. Les nanocomposites devront présenter une certai

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25

Moussaoui, Myriam. "Elaboration et caractérisations de nouveaux matériaux diélectriques structurés par des nanoparticules de sulfure de zinc : applications prospectives." Thesis, Saint-Etienne, 2011. http://www.theses.fr/2011STET4001.

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Анотація:

Ce travail de thèse a pour objectif la création d’indice optique local et contrôlé dans une matrice vitreuse à travers la mise au point et le développement de procédés de synthèse de nanoparticules (NPs) de sulfure de zinc (ZnS) dans un verre d’oxydes. Nous avons commencé par l’élaboration par voie de fusion d’un verre d’oxydes de composition initiale très simple. Nous avons ensuite examiné la problématique de la synthèse et du contrôle de croissance des NPs de ZnS dans nos échantillons dans trois matrices différentes et par trois traitements : recuit thermique, insolation UV ou par un traitem

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26

Barichard, Anne. "Enregistrement et analyses physico-chimiques de réseaux dans des matériaux composites polymères-points quantiques." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28504/28504.pdf.

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27

Chen, Sz-jiun, and 陳思均. "Transparent ZnO/Silicone nanocomposite film for UV shielding." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/34614099064260860996.

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碩士<br>國立中央大學<br>化學工程與材料工程研究所<br>100<br>ZnO nanoparticles (~5 nm) have been prepared and surface-modified with 3-(trimethoxysilyl)propylmethacrylate (MPS). The product is a dry powder which can be re-dispersed in many solvents. Based on the results of IR and NMR analysis, the directly anchored MPS exhibits both tridental and monodental structures, while a second layer of partially condensed silane are linked to the monodental ones. Due to the existence of both methacrylate group and residual hydroxyl, the ZnO@MPS powder can be dispersed in both polar and non-polar solvents. The dispersion remai

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PAN, TUNG-SHENG, and 潘同昇. "Synthesis of Au/ZnO nanocomposite and its application in P3HT/ZnO BHJ solar cell." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/mhm22j.

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碩士<br>國立臺灣科技大學<br>化學工程系<br>99<br>In this study, bulk heterojunction photovoltaic devices have been fabricated by utilizing a conjugated polymer P3HT as electron donor and self-assembled monolayer (SAM)-modified crystalline ZnO nanorods as electron acceptor. By modifying with different SAMs, the solubility of ZnO can be improved when blending with P3HT in organic solvent such as chlorobenzene, leading to improved solar cells performance. The Jsc can be further increased up to 43.5% upon the modification of ZnO by 61-dicarboxylic acid SAM (C60-SAM). Finally, in order to apply the surface plasmon

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29

GARG, PALAK. "BIOSYNTHESIZED RGO@ZNO NANOCOMPOSITE FOR BOVINE SERUM ALBUMIN DETECTION." Thesis, 2020. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18318.

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Bovine serum albumin (BSA) is a globular protein that plays a pivotal role in the delivery of fatty acid/amino acid. The presence of multiple binding sites in BSA allows it to interact with many inorganic, organic molecules, ionic metals, and radicals. The reduction of BSA may cause various diseases in cattle families, thus making the quantification of BSA crucial. In the present work, efforts have been made to fabricate an immunosensor for the detection of BSA using reduced graphene oxide@zinc oxide nanocomposite (rGO@ZnO). The nanocomposite has been synthesized via a biosynthetic appro

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Jiun-TingChen and 陳俊廷. "Characterizations of ZnO-SiO2 Nanocomposite Film Based Optoelectronic Devices." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/40130247069853319438.

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博士<br>國立成功大學<br>光電科學與工程學系<br>101<br>In this dissertation, zinc oxide-silicon dioxide (ZnO-SiO2) nanocomposite films were grown via a co-sputter system at room temperature (RT). High-resolution transmittance electron microscopy (HRTEM) results reveal that the diameter of ZnO nanoparticles in the ZnO-SiO2 nanocomposite was within 3 mm to 7 nm. In addition, the ZnO-SiO2 nanocomposite films have wide bandgap characteristics. Thus, they are used to fabricate a p-GaN/i-ZnO/n-ZnO:In (p-i-n) light-emitting diode (LED) and a flexible solar-blind photodetector (PD). First, ZnO-SiO2 nanocomposite films w

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Ya-ChiKo and 柯雅淇. "Preparation and application of Ag/ZnO/reduced graphene oxide nanocomposite." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/03458305987687493846.

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碩士<br>國立成功大學<br>化學工程學系<br>103<br>In this study, Ag/ZnO/reduced graphene oxide (Ag/ZnO/rGO) nanocomposite was fabricated and its applications in the detection and killing of bacteria were investigated. This nanocomposite combined the photocatalytic property of ZnO nanoparticles, the high specific surface area and near infrared (NIR) photothermal conversion property of rGO, and the bacteria-killing capability and surface enhanced Raman scattering (SERS) property of Ag nanoparticles. At first, ZnO/rGO nanocomposite was prepared from zinc acetate and graphene oxide (GO) by solvothermal method in t

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Chen, Yung-Ting, and 陳勇廷. "Optoelectronic properties of nanocomposite devices based on ZnO and Si." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/93190342282052638953.

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博士<br>國立臺灣大學<br>物理研究所<br>99<br>In this thesis, we have reported the design, fabrication, and characterization of nanoscale semiconductors and optoelectronic devices. Several newly designed nanocomposites with intriguing properties have been discovered, which are described below. It is believed our studies shown here can serve as a key step for the further development of novel functional optoelectronic devices. 1.Giant white and blue light emission from Al2O3 and ZnO nanocomposites A new and general approach enabling us to amplify not only the bandgap emission of ZnO nanorods but also the def

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Huang, Cian-Jyun, and 黃千峻. "Improvement in Dye-Sensitized Solar Cell by ZnO and TiO2 Nanocomposite." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/92360819025536604489.

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碩士<br>東海大學<br>物理學系<br>99<br>Abstract 　　The goal of this research is that the zinc oxide nanowires will be applied to form the ZnO / TiO2 composites in dye-sensitized solar cells. The main idea is to keep a large surface area of TiO2 nanoparticles for absorption of dye, and reduce the occurrence of the reverse reaction behavior by adding the ZnO nanowires. 　　In experiments, ZnO nanowires are grown by using chemical vapor deposition (CVD). Also, a compact layer of TiO2 is prepared by the sol-gel method between the ZnO nanowires and P-25 TiO2 particles. ZnO nanowires form a protective effect agai

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Chou, Ting-Tsung, and 周廷璁. "The high-temperature annealing effect to magnetoresistance of Co/ZnO nanocomposite." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/32213233204959953139.

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碩士<br>國立成功大學<br>物理學系碩博士班<br>96<br>We use Molecular Beam Epitaxy (MBE) to fabricate (Co/ZnO)30 nanocomposite under high temperature (400℃). As-deposited samples annealed at high temperature with different time period. Structure, transport and magnetic properties were respectively investigated to clarify effect of ferromagnetic particles and oxide defects on magnetoresistance (MR). Structure of Co/ZnO nanocomposite due to vacuum annealing is characterized by x-ray diffraction and absorption spectra. Analysis of Impedance spectra and temperature-dependent resistivity show that defects in oxide ar

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Yeh, Chen-han, and 葉承翰. "Polymer Light Emitting Diodes Based on DBPPV-ZnO Nanocomposite Emissive Layer." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/02771379177043249299.

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碩士<br>國立成功大學<br>光電科學與工程研究所<br>95<br>By the development of the intelligent industry, people have more require for monitor. And polymer light emitting diodes (PLED) have attracted much attention because of their potential applications in information display. They have some advantages such as low fabrication cost, easy processing, lightweight, and can fabricated on large area display and flexible substrate…,etc. However, the conjugated polymer is easy to affect by the moisture and oxygen in environment, and then influence the performance and life time to limit its applications in commercial, so

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Peng, Yu-Yun, and 彭羽筠. "Optical and Electrical Properties of ZnO QDs-SiO2 and ZnO QDs-SiOxNy Nanocomposite Thin Films Prepared by Target-attached Sputtering Method." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/16619395439794523967.

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博士<br>國立交通大學<br>材料科學與工程系所<br>96<br>This thesis prepares the nanocomposite thin films containing ZnO quantum dots (QDs) in SiO2 and SiOxNy dielectric matrices by using the target-attached sputtering method. The optical and electrical properties of nanocomposite thin films as well as the effects of dielectric types on the characteristics of ZnO QDs are also investigated. Experiemental results indicate that such a simple physical deposition (PVD) method can effectively grow the ZnO QDs inside the dielectric material within good control on dot sizes and distribution. Via the analyses including mic

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Song, Cheng-Wei, and 宋政緯. "The Effect of Al Doping on the Optoelectronic Properties of ZnO/PEDOT/PSS Nanocomposite Film." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/r73ff9.

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碩士<br>國立臺北科技大學<br>資源工程研究所<br>102<br>In this study, transparent and conductivity nanocomposite films of Al doped ZnO nanoparticles and PEDOT/PSS in PEG300 were coated on glass substrate by using the spin coating method. The experiment was divided into two parts. First, Un-doped ZnO and Al (0.3–4.0 at.%) doped ZnO nanopowders (AZO) were prepared by the Pechini method, heat treatment at 500oC for 3 h in air, and then analyzed by SEM-EDX、TEM、XRD、Raman spectra、UV-Vis、XPS and Four point probe. The morphology and grain size were found to be controlled by heat treatment temperature and the concentrat

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Shih-YingHuang and 黃仕穎. "A study of an inorganic CuSCN hole-transport layer in a ZnO nanocomposite ultraviolet photodetector." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/97835288007157587468.

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碩士<br>國立成功大學<br>微電子工程研究所<br>104<br>This thesis employed electroplating technique to deposit an inorganic CuSCN material to replace the conventional PEDOT:PSS and TPD-Si2 organic materials as a hole transport layer for applying to a novel nanocomposite photodetector. To fabricate the photodetector, the CuSCN hole transport layer was covered with a nanocomposite active layer followed by evaporating BCP as a hole block layer, and a sputtered aluminum film as the electrode. The active layer consists of a P-type organic PVK material and a N-type wide band-gap ZnO nanoparticles. When the device un

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Hsieh, Siang-Jhen, and 謝享真. "Preparation, Characterization and Kinetics of Adsorption and Degradation of Methylene Blue of rGO/CS/ZnO Nanocomposite." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/07264539458515700214.

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碩士<br>國立高雄師範大學<br>化學系<br>102<br>In recent years, graphene, with many excellent properties, has affected a lot of research attentions. Studies about graphene or graphene oxide-based composites have been widely developed and applied, such as the synthesis of chitin/chitosan-based graphene oxide–ZnO hybrid composites for better properties. However, recent studies had not yet carried out for composite materials of graphene-based chitosan – ZnO, so our research was focused on the rGO / CS / ZnO composite. In order to identify rGO / CS / ZnO composite, we used FT-IR spectroscopy, X-ray powder diffra

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Madhukar, Poloju. "Synthesis and Characterization of ZnO Nanostructures and Synthesis of Zn/Al2O3 Nanocomposite by Mechanical Alloying Route." Thesis, 2011. http://ethesis.nitrkl.ac.in/2785/1/madhukar_thesis.pdf.

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We report simple methods to synthesize Zinc oxide nanostructures, without using catalysis with less complicity. This was done by oxidation of zinc foil at various temperatures (200oC-1000oC) and various times (1-3h) and also we find that the nanostructures size and shape depends on heating rate, temperature and heating time. Apart from oxidation of zinc we also find zinc oxide nanostructures in Zn-C dry battery. This nanostructure is formed on inner surface of Zn container (which acts as anode). These nanostructures are formed due reaction between electrolyte (mixture composed of manganese (IV

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Μαθιουδάκης, Γεώργιος. "Ανάπτυξη, χαρακτηρισμός και λειτουργική συμπεριφορά σύνθετων συστημάτων πολυμερικής μήτρας - νανοσωματιδίων οξειδίου του ψευδαργύριου (ZnO) και καρβιδίου του τιτανίου (TiC)". Thesis, 2013. http://hdl.handle.net/10889/6134.

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Ένας συναρπαστικός τομέας της σύγχρονης επιστημονικής έρευνας είναι αυτός των νανοσύνθετων υλικών. Το πεδίο αυτό περιλαμβάνει τη μελέτη πολυφασικών υλικών, στα οποία μία ή περισσότερες από τις χωρικές διαστάσεις κάποιας φάσης βρίσκεται στην περιοχή νανομέτρων (10-9m). Αυτό που ξεχωρίζει τα νανοσύνθετα από τα άλλα συμβατικά σύνθετα υλικά είναι η ικανότητά τους να συνδυάζουν ιδιότητες, οι οποίες είναι απαγορευτικές για τα παραδοσιακά υλικά, αλλά και η λειτουργικότητα που παρουσιάζουν. Η εισαγωγή των νανοσύνθετων υλικών και οι πολλές επιστημονικές μελέτες που έγιναν τα τελευταία χρόνια στόχευαν κ

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Liu, Tsung-Sheng, and 劉宗昇. "Aluminum based in situ nanocomposite produced from Al-Mg-ZnO powder mixture by using friction stir processing." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/g83fv9.

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碩士<br>國立中山大學<br>材料與光電科學學系研究所<br>103<br>Friction stir processing was used to fabricate the aluminum based in situ composite from powder mixture of Al-Mg-ZnO. In the Al-Mg-ZnO composites, MgO particles were produced in situ by oxide-aluminum displacement reactions. Microstructural observations revealed the average Al grain size in the FSPed composite was about 1.10±0.61 μm. The composite exhibits superior mechanical strength due to the large amount of nanometer-sized reinforcements in a submicron-grained matrix after heat treatment.

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Chang, Wen-Hsuan, and 張文瑄. "ZnO and MgO nanoparticles confined in 3D mesoporous carbon as efficient nanocomposite anodes for lithium-ion batteries." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/rm6cgw.

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碩士<br>國立中央大學<br>化學學系<br>105<br>Trainsition metal oxide as anode materials in lithium ion batteries have attracted tremendous attention in the past few years because of their characterstics.ZnO is regarded as one of the most promising anode material for lithium ion batteries (LIBs), due to its high theoretical capacity (978 mAh/g), natural abundance, and low cost. Although MgO is electrochemically inactive, its adsorption capacity towards liquid electrolyte functioning as a protective coating and enhancement in ionic conductivity encourages the use of a MgO-decorated composite as an anode for L

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Wang, Cih-Su, and 王慈甦. "Lasing properties of TiO2/ZnO nanocomposites." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/93662725864747811756.

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碩士<br>國立臺灣大學<br>應用物理所<br>99<br>An improvement in random lasing action at ultraviolet wavelength has beenachieved from ZnO nanorod arrays grown on sapphire substrate with the assistance of TiO2 nanoparticles. Due to the inherent nature of high refractive index of TiO2 (n ~2.5)> ZnO(n~1.9), the TiO2 nanoparticles can serve efficiently as excellent nanoscatterers,which can promote the formation of closed-loop paths. In addition, the underlying origin of the pronounced lasing action can also be attributed to the enhanced emission arising from fluorescence resonance energy transfer (FRET) between t

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Chen, Jui-Hung. "Synthesis and Properties of Novel Inorganic/Polymer Nanocomposite Part 1 Heterocoagulation of TiO2/Poly(AA-co-MMA) Nanoparticles and Blending with PET Part 2 PEDOT Film with High Conductivity and ZnO Nanorods/PEDOT Composite Thin Film." 2008. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-0808200810485100.

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Panigrahi, Sharbani. "Structure, microstructure and physical properties of ZnO based nanocomposites." Thesis, 2019. http://hdl.handle.net/10821/8317.

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thesis entitled “Structure, microstructure and physical properties of ZnO based nanocomposites” deals mainly with the structural, photoluminescence and photoconductivity properties of different ZnO-based nanocomposite materials in various forms. These properties have been discussed by analyzing the role of defect states and band alignment of the composite materials in controlling the optical and opto electrical properties of the materials. Among all the wide band gap semiconductors, nanostructured ZnO (Eg ̴ 3.37 eV) has been paid a great attention by the scientific world due to its high excito

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Yu-JuiKao and 高育瑞. "Flexible ZnO-SiO2 nanocomposites solar-blind photodetector." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/43452289048917371268.

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碩士<br>國立成功大學<br>光電科學與工程學系<br>100<br>In this research, we deposited ZnO-SiO2 nanocomposite by magnetron sputter at room temperature and used it as the absorption layer on the flexible polyethersulfone (PES) substrate to fabricate a high detectivity and low noise flexible solar-blind photodetector. At a 10 V reverse bias, the maximum responsivity value and quantum efficiency of the device were 0.75 A/W and 482% at 240 nm respectively, and it showed a high UV-to-visible rejection ratio up to ~105. We used silicon-based organic thin film (SiOx(CH3)) as the buffer layer between ZnO-SiO2 nanocomposi

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Chen, Ya-Chun, and 陳雅君. "ZnO/graphene oxide nanocomposites : preparation, properties, and applications." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/47115021074448707385.

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碩士<br>國立高雄大學<br>化學工程及材料工程學系碩士班<br>100<br>This work includes two parts, the first one is to synthesize graphene oxide (GO) by Hummers method and study the chemical reduction of GO by NaBH4 and H2 treatments. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) show the d-spacing and oxygen-containing groups of GO were decreased after the reduction treatments. Besides, heat treatments show the oxygen-containing groups of GO powders begin to be desorbed at the temperature of 200℃. The results show that the GO could also be reduced by directly heating in air. The second p

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Chen, Ya-Ling, and 陳雅玲. "Synthesis of SR-444/Epoxy/ICS/ZnO Nanocomposites." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/54611435442963432433.

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碩士<br>國立高雄師範大學<br>化學系<br>104<br>This research is to develop novel SR-444/Epoxy/ICS/ZnO organic/inorganic nanocomposites and their hybrid films with high thermal resistant, transparent and anti-static properties. Epoxy(Diglycidyl ether of bisphenol A), SR-444(Pentaerythritol triacrylate),ICS(tris[3-(trimethoxysilyl)propyl]isocyanurate), ZnO and PMDA(pyromellitic dianhydride) were used as organic monomer, monomer of hypercrosslinked copolymer, coupling agent, inorganic filler and curing reagent respectively. Firstly, ICS coupling agent was acid hydrolysis for 15 min to form its reactive silanol

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CHEN, JHAO-CHENG, and 陳昭誠. "Flexible CsPbBr3/ZnO Nanocomposites for UV Photodetectors Applications." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/33bdm2.

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碩士<br>國立臺北科技大學<br>製造科技研究所<br>107<br>In this study, we separate it to three steps, first polar ZnO thin films were used to be a buffer layer for synthesizing the second step’s one dimensional polar ZnO nanorods, then we start using these samples to be the UV photodetectors to discuss the reproducibility and stability of this sample. Lastly, spin coating CsPbBr3 perovskite quantum dots on top for UV photodetector sensing. First, polar ZnO thin films were deposited onto the p-type (100) Si and mica substrate by using Plasma Enhanced Chemical Vapor Deposition (PECVD)system. Second, utilizing the a

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