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Dissertations / Theses on the topic 'Films nanoporeux'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Cojocaru, Ludmila. "Films d’oxydes semi-conducteurs nanoporeux et nanocristallins pour dispositifs photovoltaïques hybrides." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14630/document.

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Dans le contexte de la mise au point de dispositifs photovoltaïques efficaces, bon marché et respectueux de l’environnement, la synthèse d’oxydes métalliques semi-conducteurs tels que SnO2, Zn2SnO4 et WO3 de morphologies et textures diverses a été développée afin d’élaborer des photoanodes poreuses pour cellules solaires à colorant. D’après les études réalisées par différentes méthodes (MEB, MET, DRX et BET), les matériaux obtenus présentent des caractéristiques texturales, morphologiques et structurales appropriées pour l’application visée. Des cellules solaires à colorant ont donc été réalis

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2

Chachay, Lucas. "Elaboration de films de cuivre nanoporeux et thermocompression pour l'assemblage en électronique de puissance." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALI001.

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Afin de diminuer l’émission de gaz à effet de serre dans le domaine de l’aéronautique, les constructeurs cherchent à électrifier les différentes motorisations utilisées dans les avions, et notamment dans un premier temps les motorisations secondaires (train d’atterrissage, …). Cet objectif nécessite d’augmenter les performances des modules électroniques de puissance, en particulier en améliorant la qualité des assemblages entres les différents composants et substrats.C'est dans ce contexte que se situent ces travaux de thèse. Nous proposons une technique d'assemblage innovante avec des connexi

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3

Mauroy, Cyprien. "Films multicouches nanocristaux de cellulose/Ge-Imogolite pour l'élaboration de nouveaux matériaux nanoporeux." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0265/document.

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Lors des dix dernières années, les films multicouches ont suscité l’intérêt de la communauté scientifique pour leurs propriétés innovantes. Principalement issus de l’association de polyélectrolytes et/ou de nanoparticules de différentes morphologies, ils ont ouvert la voie à la fabrication d’une nouvelle catégorie de matériaux nanoporeux, possédant des propriétés optiques attractives telles que la coloration structurale et l’antireflet. Les films multicouches à base de deux nanoparticules de charges opposées sont plus rares et permettent de jumeler les propriétés des deux nanoparticules utilis

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4

Pastre, Aymeric. "Élaboration d’électrodes à base de films d’or nanoporeux et conception de micro-supercondensateurs intégrés." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10187/document.

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Le travail de thèse a pour objectif la conception de micro-supercondensateurs tout-solide à base d’or nanoporeux, intégrés sur substrat de silicium. Dans un premier temps nous avons développé un procédé de formation de films d’or par réduction chimique auto-catalytique. Afin d’augmenter l’adhérence du film d’or sur le substrat de silicium, une couche d’accroche originale a été élaborée par procédé sol-gel. Il s’agit d’un film mince d’oxyde de zirconium (ZrO2) dopé par des nanoparticules d’or. La porosité de ces films d’or a été contrôlée par une méthode de templating à partir de microsphères d

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5

Wong, Ka Lun. "Incorporation des semi-conducteurs dans des matériaux nanoporeux et mise en forme de films minces." Caen, 2010. http://www.theses.fr/2010CAEN2056.

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Les semi-conducteurs nanométriques (NSCs) sont des matériaux à haut potentiel pour diverses applications tels que l’optoélectronique, le photovoltaïque, et les capteurs chimiques. Dans cette étude, deux types de synthèses ont été développées pour la fabrication des NSCs dans des matériaux zéolitiques: une synthèse en une étape (OSS), et une synthèse par échange d’ion et irradiation (IEI). La méthode OSS permet de synthétiser directement des NSCs dans une zéolithe hydrophobe de silice pure de type MFI par co-condensation de précurseur de silice, de 3-mercaptopropyl-trimethoxysilane (MPTS), de p

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6

Amyar, Hajar. "Probing the formation and the sorption response of nanoporous films by in situ optical spectroscopies." Electronic Thesis or Diss., Sorbonne université, 2023. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2023SORUS204.pdf.

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Les films nanoporeux présentent un grand intérêt en raison de leurs propriétés uniques et de leurs applications variées dans différents domaines. La caractérisation de ces films est cruciale pour comprendre et contrôler leurs propriétés (telles que la taille et la distribution des pores, l'aire de surface, la porosité et la résistance mécanique) et leur évolution dans des conditions de fonctionnement. A cet égard, parmi les méthodes spectroscopiques optiques, l'ellipsométrie, en particulier l'ellipsométrie in situ, est une technique puissante et non-destructive pour caractériser les films nano

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7

Topoglidis, Emmanuel. "Biosensors based on nanoporous TiO2 films." Thesis, Imperial College London, 2001. http://hdl.handle.net/10044/1/7573.

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8

Gage, David Maxwell. "Fracture of nanoporous organosilicate thin films /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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9

Ceratti, Davide Raffaele. "Viability of nanoporous films for nanofluidic applications." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066482/document.

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Ces travaux de thèse ont eu deux objectifs: i) le développent de systèmes nanofluidique en utilisant une méthode non-lithographique, peu chère et facilement transposable à l'échelle industrielle ii) la compréhension des phénomènes nanofluidiques au travers des études expérimentales et de modélisation. Des couches minces mesoporeuses, en particulier des structures planaires avec des nanopiliers, ont été utilisé pour des études sur l'infiltration capillaire des liquides dans espaces confiné au niveau nanométrique. En plus des premiers tests pour des applications plus complexes comme des séparati

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10

Ceratti, Davide Raffaele. "Viability of nanoporous films for nanofluidic applications." Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066482.

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Ces travaux de thèse ont eu deux objectifs: i) le développent de systèmes nanofluidique en utilisant une méthode non-lithographique, peu chère et facilement transposable à l'échelle industrielle ii) la compréhension des phénomènes nanofluidiques au travers des études expérimentales et de modélisation. Des couches minces mesoporeuses, en particulier des structures planaires avec des nanopiliers, ont été utilisé pour des études sur l'infiltration capillaire des liquides dans espaces confiné au niveau nanométrique. En plus des premiers tests pour des applications plus complexes comme des séparati

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11

Kipnusu, Wycliffe Kiprop. "Effects of Nanoscale Confinement on the Structure and Dynamics of Glass-forming Systems." Doctoral thesis, Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-183530.

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Structure and dynamics of nanoconfined glass-forming oligomers and diblock coplymers (BPCs) are investigated by a combination of infrared transition moment orientational analysis (IR-TMOA), positron annihilation lifetime spectroscopy (PALS), grazing incidence small angle X-ray scattering (GISAXS), atomic force microscopy (AFM), scanning electron microscopy (SEM) and broadband dielectric spectroscopy (BDS). The oligomers probed are the van der Waals type, tris(2-ethyhexyl)phosphate (TEHP) and the self-associating molecules of 2-ethyl-1-hexanol (2E1H). Symmetric and asymmetric poly(styrene-b-1,

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12

Hudiono, Yeny C. "Thermal transport properties of nanoporous zeolite thin films." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24748.

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Thesis (Ph.D.)--Chemical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Prof. Sankar Nair; Committee Co-Chair: Prof. Samuel Graham; Committee Member: Prof. Amyn S. Teja; Committee Member: Prof. Mo Li; Committee Member: Prof. Peter Ludovice.

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13

Kearney, Andrew V. "Fracture and fatigue of ultrathin nanoporous polymer films /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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14

Segerkvist, Anton. "Structural Characterisation and Optical Properties of Nanoporous Gold Films." Thesis, Uppsala universitet, Fasta tillståndets fysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-239149.

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Nanoporous metal films have many applications in a great variety of scientific fields, and especially nanoporous gold films have many applica- tions in green nanotechnology. Hence, structural and optical properties of such materials were investigated. Local density functions and local per- colation functions were calculated by using scaning electron micrographs and the optical properties of the films were calculated using the Hilfer equation. The results are presented in the report as graphs and show how the materials optical properties depend on the structure of the gold films.

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15

Xin, Binbin. "Synthesis of nanoporous Ca3Co4O9 thin films for flexible thermoelectrics." Licentiate thesis, Linköpings universitet, Tunnfilmsfysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-170837.

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During energy generation, transportation and usage, large amounts of energy are lost as waste heat. With increasing energy consumption and environmental issues, exploiting this waste heat has drawn extensive attention. Thermoelectric energy conversion is an approach to take advantage of the ability of thermoelectric materials to convert waste heat into electricity. The thermoelectric effect was initially studied in the early 19th century with the discovery of the Seebeck effect. Thermoelectric materials and devices can directly convert thermal energy (temperature gradients) into electric energ

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16

Trezza, Michele. "Nb nanoporous ultrathin films: matching effects and interconnected wires." Doctoral thesis, Universita degli studi di Salerno, 2012. http://hdl.handle.net/10556/336.

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2010 - 2011<br>When the applied magnetic field is higher than the lower critical field but below the upper critical field, a type-II superconductor allows magnetic flux to penetrate it in the form of vortices, a tiny normal area surrounded by supercurrents. Driven by the Lorentz force of a passing external current or by thermal activation, vortices can move. Their motion induces energy dissipation and eventually can destroy the super- conductivity. Recent advances in nanofabrication have led to tremendous possibilities for implementing superconducting pinning structures and controlling t

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17

Jiang, Dianlu, and n/a. "Studies of Photocatalytic Processes at Nanoporous TiO2 Film Electrodes by Photoelectrochemical Techniques and Development of a Novel Methodology for Rapid Determination of Chemical Oxygen Demand." Griffith University. School of Environmental and Applied Science, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040723.155003.

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In this work, a series of simple, rapid and effective photoelectrochemical methodologies have been developed and successfully applied to the study of kinetic and thermodynamic characteristics of photocatalytic oxidation processes at TiO2 nanoparticulate films. As an application of the systematic studies of photocatalytic processes by photoelectrochemical techniques, a rapid, direct, absolute, environmental-friendly and accurate COD analysis method was successfully developed. In this work, the TiO2 nanoparticles colloid was prepared by the sol-gel method. The TiO2 nanoparticles were immobiliz

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18

Jiang, Dianlu. "Studies of Photocatalytic Processes at Nanoporous TiO2 Film Electrodes by Photoelectrochemical Techniques and Development of a Novel Methodology for Rapid Determination of Chemical Oxygen Dphotocatalemand." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/366458.

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In this work, a series of simple, rapid and effective photoelectrochemical methodologies have been developed and successfully applied to the study of kinetic and thermodynamic characteristics of photocatalytic oxidation processes at TiO2 nanoparticulate films. As an application of the systematic studies of photocatalytic processes by photoelectrochemical techniques, a rapid, direct, absolute, environmental-friendly and accurate COD analysis method was successfully developed. In this work, the TiO2 nanoparticles colloid was prepared by the sol-gel method. The TiO2 nanoparticles were immobiliz

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19

Wu, Qingliu. "SYNTHESIS AND ENERGY APPLICATIONS OF ORIENTED METAL OXIDE NANOPOROUS FILMS." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/206.

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This dissertation mainly addresses the synthesis of well-ordered mesoporous titania thin films by dip coating with PEO-PPO-PEO triblock copolymer surfactant template P123. Because P123 is composed of poly(ethylene oxide) [PEO] and poly(propylene oxide) [PPO] blocks, concentrations of ingredients are adjusted to tune the films’ wall thickness, pore size and mesophase. Structural changes are consistent with partitioning of species among PEO blocks, PPO blocks, and the PEO/PPO interface. Titanates localize near PEO and increase wall thickness (by 5 nm to 7 nm). Depending on aging temperature, PPG

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20

Koganti, Venkat Rao. "CONTROLLED EVAPORATION DRIVEN SYNTHESIS AND APPLICATIONS OF ORDERED NANOPOROUS CERAMIC FILMS." UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_diss/307.

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This dissertation addresses the synthesis of oriented mesoporous ceramic films by evaporation induced self-assembly of surfactants and ceramic precursors in films dip coated from ethanol-rich sols. First, the kinetics of silica polycondensation in surfactant templated sol-gel films is studied both before and after deposition using infrared spectroscopy. These observations reveal an induction time (with minimal condensation rate) before curing begins in certain surfactant-templated silica films, which can be utilized to perform post-synthesis modification. This induction time is maximized at hi

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21

Robertson, Calum. "The fabrication of nanoporous template thin films for supercritical fluid electrodeposition." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/387355/.

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This work investigates the fabrication of nanoporous templates as a part of the supercritical fluid electrodeposition (SCFED) project. The goals set for this investigation was to produce films with pore channels (diameter < 5 nm) orientated perpendicularly on top of an electrode. During the course of this work, two techniques were investigated, Stöber-derived method and electrochemical-assisted self-assembly (EASA). The Stöber films produced perpendicularly orientated pore structure through a hydrothermal process. EASA film were generated through electrodeposition, resulting in highly ordered

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22

Hedbor, Sigrid, and Linnéa Klar. "Plant Extract Sensitised Nanoporous TiO2 Thin Film Photoelectrochemical Cells." Thesis, Uppsala University, Department of Earth Sciences, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88885.

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<p>För att undersöka skillnad i prestationsförmåga mellan celler sensiterade med växtextraktsbaserad färg, och celler sensiterademed ruteniumkomplex-baserad färg, samt huruvida presskraften påverkar en cells prestationsförmåga, tillverkades icke-slutna fotoelektrokemiska färg-sensiterade solceller med tunnfilmsfotoelektroder av pressad, nanoporös titandioxid.</p><p>Cellerna pressades med tre olika presskrafter och sensiterades med växtextraktsfärg från rödkål, rödbeta, viol och henna, samt en ruteniumkomplex-baserad färg som fick utgöra kontrollbetingelse. För varje cell uppmättes IPCE- och iV

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23

Jin, Pu. "Fabrication of synthetic nanopores in thin films for studies of analytical applications." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0041088.

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24

Moloney, John, Thomas McDermott, Taslima Akter, et al. "Molecular simulation of the fabrication and permselective characterisation of thin nanoporous silica films." Diffusion fundamentals 16 (2011) 21, S. 1-3, 2011. https://ul.qucosa.de/id/qucosa%3A13753.

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25

Moloney, John, Thomas McDermott, Taslima Akter, et al. "Molecular simulation of the fabrication and permselective characterisation of thin nanoporous silica films." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-184768.

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26

Yoon, Jongsik. "Nanostructured thin films for solid oxide fuel cells." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3164.

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27

Quintana, Puebla Alberto. "Enhanced magnetoelectric effects in electrolyte-gated nanoporous metallic alloy and dense metal oxide films." Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/663838.

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Esta tesis abarca el estudio de propiedades magnetoeléctricas en aleaciones magnéticas y metálicas nanoporosas, y en capas densas de óxidos de metales de transición. La naturaleza interfacial de los procesos magnetoeléctricos ha hecho que históricamente el estudio de estos fenómenos se abordara en sistemas de elevada relación superficie/volumen, limitándose muchas veces a capas ultradelgadas (1-2 nm). En esta tesis, se postula una nueva forma de afrontar el estudio de estos procesos, basada en el uso de materiales nanoporosos los cuales se caracterizan por tener una relación superficie/volume

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28

Hao, Qing, Yue Xiao, and Hongbo Zhao. "Characteristic length of phonon transport within periodic nanoporous thin films and two-dimensional materials." AMER INST PHYSICS, 2016. http://hdl.handle.net/10150/621715.

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In the past two decades, phonon transport within nanoporous thin films has attracted enormous attention for their potential applications in thermoelectrics and thermal insulation. Various computational studies have been carried out to explain the thermal conductivity reduction within these thin films. Considering classical phonon size effects, the lattice thermal conductivity can be predicted assuming diffusive pore-edge scattering of phonons and bulk phonon mean free paths. Following this, detailed phonon transport can be simulated for a given porous structure to find the lattice thermal cond

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29

Loizillon, Jérôme. "Development of ellipsometry porosimetry for the characterization of nanoporous thin films applied to photovoltaics." Electronic Thesis or Diss., Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0308.

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Avec le développement des nanotechnologies, la nécessité d’élaborer des matériaux à très petite échelle s’est accrue. En particulier, les couches minces (du nanomètre au micromètre) nanoporeuses sont utilisées dans de nombreux domaines tels que l’optique, l’électronique, ou la détection. Leur utilisation principale en tant que revêtement anti-reflets est cruciale pour les panneaux solaires en permettant d’augmenter leur rendement global. Pour ce type d’application, les couches minces doivent être en mesure de supporter des phénomènes d’abrasion (sable, nettoyage) ou des attaques chimiques (plu

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Li, Wen-Chung. "MICROSTRUCTURAL EVOLUTION AND PHYSICAL BEHAVIOR OF PALLADIUM AND OSMIUM-RUTHENIUM NOBLE METAL FILMS." UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_diss/802.

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Nanostructured noble metals exhibit novel physical, mechanical and chemical behavior, and hold promise for applications such as gas sensing and electron emission. A strong emphasis was placed on the processing and characterization of these materials, in the form of nanoporous or nanocrystalline thin films. Palladium-based and osmium-ruthenium alloys were investigated in this dissertation research and will be presented as follows: (1) Preparation and Characterization of Nanoporous Metal Thin Films (2) Characterization of Osmium-Ruthenium Coatings Nanoporous palladium (np-Pd) thin films were pre

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31

Ianniello, Graziella. "Polymeric films with co-crystalline and nanoporous crystalline phases: orientations, chirality and possible applications in photonic crystals." Doctoral thesis, Universita degli studi di Salerno, 2015. http://hdl.handle.net/10556/2015.

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2013 - 2014<br>Polymers can crystallize in different crystalline forms; polymorphism is the term to indicate this ability. It is known that processing and physical properties of polymer-based materials are strongly affected by the occurrence of ‘‘polymorphism’’ and ‘‘metamorphism’’ (i.e., the occurrence of ‘‘disordered’’ crystalline phases, characterized by a degree of structural organization that is intermediate between those identifying crystalline and amorphous phases). My PhD thesis is focused on the study and on the characterization of polymer films with co-crystalline and nanoporous

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Jiang, Xu. "SYNTHESIS, STRUCTURE, PROPERTIES AND APPLICATIONS OF NANOPOROUS SILICON AND PALLADIUM." UKnowledge, 2015. http://uknowledge.uky.edu/cme_etds/50.

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Nanoporous (np) materials with pore size below 100 nano-meters exist naturally in biological and mineral structures, and synthetic np materials have been used industrially for centuries. Np materials have attracted significant research interest in recent decades, as the development of new characterization techniques and nanotechnology allow the observation and design of np materials at a new level. This study focuses on two np materials: nanoporous silicon (np-Si) and nanoporous palladium (np-Pd). Silicon (Si), because of its high capacity to store lithium (Li), is increasingly becoming an att

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Dalstein, Olivier. "Nanoporous thin films structured by top-down & bottom-up approaches : towards smartphone-compatible optical sensors." Electronic Thesis or Diss., Paris 6, 2017. http://www.theses.fr/2017PA066739.

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La structuration multi-échelle (à l’échelle micro- et nanométrique) de matériaux fonctionnels est un thème de recherche particulièrement actif en raison du grand potentiel des dispositifs miniatures utilisables en microélectronique, en optique (contrôle solaire, photonique) en microfluidique (lab-on-a-chip) ou pour de la détection de molécules cibles. Plusieurs techniques de micronanofabrication sont utilisées pour réaliser ces dispositifs miniaturisés. D’une part, des techniques dites « Top-Down » qui sont utilisées pour créer des formes complexes à l’échelle micro- et nanométriques à partir

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Yu, Hua. "Modification of TiO2 Photoanodes for Dye-Sensitized Solar Cells." Thesis, Griffith University, 2011. http://hdl.handle.net/10072/366656.

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With the growing demand of the photovoltaic market, high cost of the traditional silicon-based solar cells has been the biggest barrier for its widespread use of solar energy conversion. New generation solar cells, aiming at the low-cost and high- efficiency photovoltaic devices, have been researched for a couple of decades. Among the new generation solar technologies, dye-sensitized solar cell (DSSC) normally employing a nanoporous TiO2 photoanode draw a quite attention to meet future solar energy market demanding because its realizable low-cost property and high-efficiency achievement. Conti

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Wang, Siyang. "Structure Control of Functional Mesoporous Materials and Synthesis of Polydimethylsiloxane-Containing Block Copolymer." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1463958304.

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Liu, W. B., S. C. Zhang, and X. X. Lu. "On the Benign One-Pot Preparation of Nanoporous Copper Thin Films with Bimodal Chan-nel Size Distributions by Chemical Dealloying in an Alkaline Solution." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35204.

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Nanoporous copper (NPC) thin films with bimodal channel size distributions can be benignly fabricated by one-pot chemical dealloying of dual-phase Al 27 at  Cu alloy with hypereutectic structure in the NaOH solution. The microstructure of these NPC thin films was characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis. The results show that these NPC thin films are composed of interconnected large-sized channels (100s of nm) with highly porous channel walls (10s of nm), in which large-sized channels resulting from entire dissolution of solid solut

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37

Othman, Maslina. "Spectroscopic ellipsometry analysis of nanoporous low dielectric constant films processed via supercritical carbon dioxide for next-generation microelectronic devices." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4879.

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Thesis (Ph.D.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 24, 2009) Vita. Includes bibliographical references.

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Mehedi, Hasan-Al. "Diamond nanostructure fabrication by etching and growth with metallic nanoparticles." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENT107/document.

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Le diamant est un matériau fascinant avec d'exceptionnelles propriétés physiques. Son application à divers domaines reste limitée parce que sa fabrication est difficile et nécessite des substrats et conditions spécifiques. En outre, les dispositifs de diamant tels que les capteurs nécessitent généralement la structuration et l'échelle micro ou nanométrique, et l'inertie chimique du diamant rend ce processus technologique plus difficile que celui des semiconducteurs réguliers. Il s'agit d'un besoin évident de la recherche fondamentale d’explorer de nouvelles façons de fabriquer des nanostructur

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Berardo, Lydie. "Réalisation d'une membrane solide bio-inspirée constituée d'un film polymere nanoporeux et de gramicidine-A : caracterisation de ses propriétés de transport ionique." Thesis, Montpellier 2, 2012. http://www.theses.fr/2012MON20143/document.

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Ces travaux de thèse s'inscrivent dans le cadre d'un vaste projet qui vise à construire des membranes hybrides constituée d'un support solide nanoporeux et de protéines canal-ionique biologiques. Nous nous intéressons ici à un film polymère nanoporeux en polycarbonate et à la Gramicidine-A. La membrane ainsi réalisée est étudiée par des mesures expérimentales. Ce travail peut être divisé en deux parties. Dans la première, nous rapportons l'étude du confinement de la protéine canal ionique, au sein des nanopores du film « track-etched » en polycarbonate. Après imprégnation de gA, la membrane es

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40

Lu, Zhengmao. "Design and modeling of a high flux cooling device based on thin film evaporation from thin nanoporous membranes." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/93824.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 44-46).<br>Heat dissipation is a limiting factor in the performance of integrated circuits, power electronics and laser diodes. State-of-the-art solutions typically use air-cooled heat sinks, which have limited performance owing to the use of air. One of the promising approaches to address these thermal management needs is liquid vapor phase-change. In this thesis, we present a study into the design and modeling

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Wang, Huan, and Huan Wang. "Flow Field Penetration in Thin Nanoporous Polymer Films under Laminar Flow by Förster Resonance Energy Transfer Coupled with Total Internal Reflectance Fluorescence Microscopy." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/565916.

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Tethered polymer layers at solid-fluid interfaces are used widely in a variety of surface science applications. Although many of these applications require exposure to dynamic flow conditions, flow field penetration into densely grafted polymer brushes, is still a question open to debate despite the fact that it is a fundamental process crucial to mass transport through these polymer films. Although most theoretical work has indicated flow field penetration into polymer films, with varying predicted penetration depths predicted, the limited experimental attempts to investigate this phenomenon

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42

Farghaly, Ahmed A. "Fabrication of Multifunctional Nanostructured Porous Materials." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4189.

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Nanostructured porous materials generally, and nanoporous noble metals specifically, have received considerable attention due to their superior chemical and physical properties over nanoparticles and bulk counterparts. This dissertation work aims to develop well-established strategies for the preparation of multifunctional nanostructured porous materials based on the combination of inorganic-chemistry, organic-chemistry and electrochemistry. The preparation strategies involved one or more of the following processes: sol-gel synthesis, co-electrodeposition, metal ions reduction, electropolymeri

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Castro, Alichandra Maria Gonçalves. "Design of multifunctional mesoporous thin films for electronic applications." Doctoral thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/18658.

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Doutoramento em Ciência e Engenharia de Materiais<br>Os materiais multiferróicos possuem simultaneamente pelo menos duas das três propriedades ferróicas: i) ferroelectricidade; ii) ferromagnetismo; e / ou iii) ferroelasticidade. Estes materiais têm despertado considerável interesse na indústria microeletrónica devido ao seu potencial para serem usados em dispositivos de armazenamento de informação com elevada capacidade e eficiência energética. A constante procura pela redução do tamanho e aumento da funcionalidade dos dispositivos, imposta pela Lei de Moore, exige materiais ferróicos, na form

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44

Bruzzi, Mara, Riccardo Mori, Andrea Baldi, Ennio Carnevale, Alessandro Cavallaro, and Monica Scaringella. "Thermally Stimulated Currents in Nanocrystalline Titania." MDPI AG, 2018. http://hdl.handle.net/10150/627084.

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A thorough study on the distribution of defect-related active energy levels has been performed on nanocrystalline TiO2. Films have been deposited on thick-alumina printed circuit boards equipped with electrical contacts, heater and temperature sensors, to carry out a detailed thermally stimulated currents analysis on a wide temperature range (5-630 K), in view to evidence contributions from shallow to deep energy levels within the gap. Data have been processed by numerically modelling electrical transport. The model considers both free and hopping contribution to conduction, a density of state

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45

Mapesa, Emmanuel Urandu. "Molecular dynamics of nanometric layers of glass formers in interaction with solid substrates." Doctoral thesis, Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-155709.

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Broadband Dielectric Spectroscopy (BDS) in combination with a nanostructured electrode arrangement – which circumvents the conventional need to evaporate metal electrodes onto soft matter – is used to study the molecular dynamics of several glass forming materials confined in nanometric (> 5 nm) layers. Other complementary experimental tools employed in this work include spectroscopic vis-Ellipsometry (SE), AC-chip calorimetry (ACC), X-ray reflectrometry (XRR), Differential Scanning Calorimetry (DSC) and Atomic Force Microscopy (AFM). The latter is used to characterize the topography of the sa

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46

Borniol, Mervyn de. "Photosensibilisation d'oxydes semi-conducteurs par des dérivés organostanniques du pérylène -3,4-dicarboximideApplication à la conversion photovoltaïque." Bordeaux 1, 2006. http://www.theses.fr/2006BOR13310.

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Le but de ce travail a été la réalisation de cellules photoélectrochimiques de type "Grätzel" à base de dioxyde d'étain photosensibilisé par des dérivés organostanniques du pérylène-3,4-decarboximide, réalisant la conversion photovoltaïque. Ces chromophores ont été obtenus par une synthèse convergente en plusieurs étapes, l'étape clef consistant en un couplage de type Stille entre un dérivé du pérylène et un oméga-iodoalkyl- ou 4-bromophenyl-tricyclohexylétain. Les études physico-chimiques réalisées en solution sur ces nouveaux colorants ont montré qu'ils possédaint les propriétés photochimiqu

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47

Carossi, Lory Cantelli. "Propriedades ópticas da alumina anódica porosa e o efeito do guia de onda." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/9003.

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Submitted by Milena Rubi (milenarubi@ufscar.br) on 2017-08-16T17:19:17Z No. of bitstreams: 1 CAROSSI_Lory_2017.pdf: 61131706 bytes, checksum: 687def06b5a758fcb457d49f53a494b1 (MD5)<br>Approved for entry into archive by Milena Rubi (milenarubi@ufscar.br) on 2017-08-16T17:19:27Z (GMT) No. of bitstreams: 1 CAROSSI_Lory_2017.pdf: 61131706 bytes, checksum: 687def06b5a758fcb457d49f53a494b1 (MD5)<br>Approved for entry into archive by Milena Rubi (milenarubi@ufscar.br) on 2017-08-16T17:19:33Z (GMT) No. of bitstreams: 1 CAROSSI_Lory_2017.pdf: 61131706 bytes, checksum: 687def06b5a758fcb457d49f53a494

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Kaul, Pankaj B. "Thermal Transport in Tin-Capped Vertically Aligned Carbon Nanotube Composites for Thermal Energy Management." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1383515941.

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Psaltis, Steven Timothy Peter. "Multicomponent charge transport in electrolyte solutions." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/60964/1/Steven_Psaltis_Thesis.pdf.

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The work presented in this thesis investigates the mathematical modelling of charge transport in electrolyte solutions, within the nanoporous structures of electrochemical devices. We compare two approaches found in the literature, by developing onedimensional transport models based on the Nernst-Planck and Maxwell-Stefan equations. The development of the Nernst-Planck equations relies on the assumption that the solution is infinitely dilute. However, this is typically not the case for the electrolyte solutions found within electrochemical devices. Furthermore, ionic concentrations much hig

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Penny, Melissa. "Mathematical modelling of dye-sensitised solar cells." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16270/.

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This thesis presents a mathematical model of the nanoporous anode within a dyesensitised solar cell (DSC). The main purpose of this work is to investigate interfacial charge transfer and charge transport within the porous anode of the DSC under both illuminated and non-illuminated conditions. Within the porous anode we consider many of the charge transfer reactions associated with the electrolyte species, adsorbed dye molecules and semiconductor electrons at the semiconductor-dye- electrolyte interface. Each reaction at this interface is modelled explicitly via an electrochemical equation, res

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