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Dissertations / Theses on the topic 'Experimentos in silico'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Marson, Pâmela Merlo. "Análise estrutural in silico e experimentos de expressão heteróloga de proteínas Cap do circovírus suíno 2b (PCV2b)." Botucatu, 2018. http://hdl.handle.net/11449/154182.

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Orientador: João Pessoa Araujo Junior<br>Resumo: A suinocultura vem alcançando grande desenvolvimento de técnicas eficientes associadas ao melhoramento genético, nutrição, manejo e sanidade. Entretanto, devido aos métodos intensivos de criação, os suínos se tornaram mais susceptíveis a um grande número de doenças infecciosas. Entre os mais importantes patógenos que afetam a indústria suinícola mundial está o circovírus suíno 2 (PCV2), um pequeno vírus icosaédrico, não-envelopado, de DNA circular, de fita simples (ssDNA), ambisenso, composta por 1767-1768 nucleotídeos. Este vírus é altamente re

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2

Almeida, Fernanda Nascimento. "Descrição da proveniência de dados para extração de conhecimento em sistemas de informação de hemoterapia." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/95/95131/tde-04092012-134137/.

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O Hemocentro São Paulo é responsável por manter um banco de dados com informações sobre cada doação ou tentativa de doação de sangue. No entanto, os dados desse banco de dados não possuem a qualidade requerida pelas ferramentas/técnicas de análise. Por essa razão, fica difícil utilizar tais dados para estabelecer relações sistemáticas entre as variáveis armazenadas. A principal contribuição desta tese é a descrição da proveniência para atributos selecionados usando critérios de classificação definidos por especialistas. Este trabalho mostra que é possível fazer investigações detalhadas usando

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3

Cavallaro, Emanuele. "Novel silicon detector technologies for the HL-LHC ATLAS upgrade." Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/666621.

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El Large Hadron Collider (LHC) en la Organización Europea para la Investigación Nuclear (CERN), Ginebra, interrumpirá su operación en 2023 para ser mejorado a High Luminosity LHC (HL-LHC) y proporcionar colisiones entre protones con una energı́a en el centro de masa de √s = 14 TeV con una luminosidad de 1035 cm−2 s−1. ATLAS es uno de los experimentos alojados en el LHC que tendrá que ser mejorado para cumplir los nuevos requisitos impuestos por la mayor luminosidad. Las obras de mejora de ATLAS prevén la sustitución del Inner Detector por un detector de trazas interamente de silicio, el Inner

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4

Romano, Rodríguez Albert. "TEM techniques for the development of ULSI technology." Doctoral thesis, Universitat de Barcelona, 1991. http://hdl.handle.net/10803/667698.

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In the last decade transmission electron microscopy (TEM) has become one of the most powerful tools for the structural characterization of crystalline materials. Especially in the field of microelectronics development and production, the information obtained by this analytical tool has been of vital importance for the improvement of the different processing steps. With the reduction of the dimensions of the devices TEM is the only technique that can give information with enough spatial resolution. In this work applications of transmission electron microscopy for the study of processing step

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5

García, Castelló Núria. "Atomistic study of structural and electronic transport properties of silicon quantum dots for optoelectronic applications." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/145640.

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Introduction It is undisputed that the silicon became the material most widely used in electronics in recent decades[1,2]. The qualities of silicon are well known, from its abundance and low cost to its ability to easily combine with oxides, so that the material has become essential in integrated electronic circuits and CMOS technology. A step further, though, is the idea of integrating electronics and photonics on the same silicon-based technology[3]. However, new strategies are needed to overcome the two principal obstacles of a possible bulk Si photonics: the indirect band gap and the band

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6

López, Acosta María. "Silicon consumption by marine sponges: an empirical approach and its ecological implications." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/663476.

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Silicon (Si), in its dissolved form of silicic acid (DSi), is a key nutrient in the ocean. The availability of such nutrient in marine ecosystems is regulated through its use by silica-secreting organisms, a variety of groups including protists, algae, and animals that consume DSi to build their silica (BSi) skeletons. The interest in determining how Si cycles in the ocean is high, since it interacts with the cycling of other major nutrients and ocean primary productivity. Because diatoms are the most abundant Si users, the scientific attempts to quantify the Si utilization in the ocean have

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7

Murillo, Cremaes Nerea. "Multifunctional silica-based nanoparticles for biomedical applications." Doctoral thesis, Universitat Autònoma de Barcelona, 2014. http://hdl.handle.net/10803/285358.

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Mi proyecto de tesis fue supervisado por la Dr. Anna Roig y Dr. Concepción Domingo y se centraba en la preparación de nanopartículas basadas en sílice con aplicaciones biomédicas. El propósito de la tesis es fabricar materiales híbridos (orgánicos-inorgánicos) complejos como dispensadores de fármacos utilizando fluidos supercríticos (FSC) con las propiedades adecuadas para su aplicación en biomedicina. Para conseguirlo, se han abordado dos objetivos principales: primero, evaluar la potencialidad de materiales porosos basados en sílice, sintetizados sin usar agentes porogénicos, como sistemas

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8

Baselga, Bacardit Marta. "Development of pixel detectors for the IBL and HL-LHC ATLAS experiment upgrade." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/384718.

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Aquesta tesi tracta el desenvolupament de detectors de silici de tecnologia avançada per experiments de Física d'Altes Energies (HEP en anglès). La mida dels detectors de silici per determinar traces en experiments de HEP ha de disminuïr per millorar la resolució espacial en les mesures i millorar l'ocupancia en l'electrònica. Els experiments al CERN hauran de funcionar amb fluencies de fins a 2·10 16 n eq 1cm2 , i els detectors de silici més petits tindran menys atrapament de les parelles electró-forat generats al volum, que porta a un millor comportament sota un medi amb alts nivells de radi

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9

Lluscà, Jané Marta. "Novel light management techniques for thin film solar cells: Nanotextured substrates and transparent conducting upconverters." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/384619.

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The objective of this work was to study two different light management approaches to enhance the efficiency of thin film Si solar cells and these were the manipulation of the light path (light trapping) and changing the incoming photon energy (upconversion). In the first approach the light path was manipulated by creating either periodic or random textured interfaces. Periodic patterns were created at the front AZO by means of direct laser ablation. Amongst all the patterns assessed, the best result was achieved with a linear pattern of 10 lam of pitch and 360 nm of groove depth, that yield

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10

Roldán, Molinero Rubén. "Módulos fotovoltaicos de silicio en capa delgada: caracterización y modelización." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/144938.

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El diseño de un sistema de generación eléctrica fotovoltaica requiere la estimación precisa de la producción eléctrica. Las especificaciones técnicas de los módulos proporcionan los parámetros eléctricos relevantes sólo en la condición estándar que la Comisión Electrotécnica Internacional establece en su norma [IEC904-1]: 25 ºC de temperatura de módulo, 1000 Wm(2) de irradiancia, AM1.5 global en la distribución espectral de la radiación e incidencia normal a la superficie del módulo. La potencia eléctrica depende de la temperatura de la célula y la intensidad y el contenido espectral de la rad

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11

Durán, Ibáñez Sara. "Suspended micro- and nanotools for cell biology." Doctoral thesis, Universitat Autònoma de Barcelona, 2014. http://hdl.handle.net/10803/285575.

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Esta tesis presenta el diseño, desarrollo tecnológico, caracterización y aplicaciones tanto químicas como biológicas de micro- y nanodispositivos destinados a ser herramientas funcionales en biología celular. Esta línea de investigación es posible gracias a los avances obtenidos en el campo de las Micro- y Nanotecnologías, donde la aplicación de técnicas de miniaturización en la fabricación de sus dispositivos a escala celular es ya una realidad. Estas herramientas son lo suficientemente pequeñas como para etiquetar y permitir el seguimiento de embriones vivos o incluso actuar como sensores p

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12

Fernández, Tejero Javier. "Design and Optimization of Advanced Silicon Strip Detectors for High Energy Physics Experiments." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/670498.

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L’Organització Europea per a la Investigació Nuclear (CERN) està implementant actualment una important actualització del Gran Col·lisionador d’Hadrons (LHC) de 27 quilòmetres, amb l’objectiu d’expandir l’abast de la física, augmentant la lluminositat i desencadenant la consegüent multiplicació d’interaccions per feix de partícules. Les noves condicions operatives de l’LHC d’alta lluminositat (HL-LHC) tindran un impacte directe en els sensors de traçat de silici dels detectors principals, els experiments ATLAS i CMS, causant un gran augment de l’ocupació dels sensors i danys per radiació. Aques

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13

Bernat, Ubiaga Ivan. "Development of a Complete Optical Microsystem for Particle Flow Detection." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/133079.

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Esta tesis doctoral resume el trabajo realizado en el Departamento de Electrónica de la Facultad de Física, en la Universidad de Barcelona. El objetivo de la misma se centra en el diseño y fabricación de un microsistema óptico basado en la integración híbrida de componentes comerciales y procesos de micromecanizado en silicio, destinado a la detección óptica de micropartículas en chips de microfluídica. Todo ello teniendo como principales metas la miniaturización y la integración de todos los componentes para obtener un sistema robusto, portátil, orientado a aplicaciones “Point of care”. E

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14

Caballero, Lorenzo Álvaro. "Optimization of hydrogenated amorphous silicon for its use in different photovoltaic technologies." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/400401.

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The main objective of this work is to study and optimize the amorphous silicon deposited in a PECVD reactor of recent acquisition, making it suitable for thin film and c-Si based solar cells. Optimization of intrinsic and doped a-Si:H was developed based on several optical and electrical properties. Intrinsic a-Si:H as active layer was optimized with series in three parameters: Depletion, hydrogen flow and temperature. The optimum layer was obtained at low depletion values, with a hydrogen flow ratio of 2:1 and at 200ºC. The series developed for p a- Si:H (TMB flow, temperature, pressure and

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15

Andreu, i. Batallé Jordi. "Plasma de silà amb confinament electrostàtic per a la obtenció de silici amorf hidrogenat." Doctoral thesis, Universitat de Barcelona, 1986. http://hdl.handle.net/10803/670243.

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El silici amorf hidrogenat (a-Si:H) s’ha convertit en el material semiconductor en capa prima més estudiat en els últims anys. Aquest esforç investigador està en gran part motivat pel gran nombre d’aplicacions industrial, com ara les cèl·lules solars en capa prima i baix preu de producció, les matrius de transistors d’efecte de camp per al direccionament de pantalles planes, la nova generació de sensors d’imatge, fotoreceptors per fotocopiadores i impressores làser... El primer silici amorf amb bones propietats semiconductores s’aconseguí el 1969, en desenvolupar-se una nova tècnica per a di

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16

Nos, Aguilà Oriol. "HWCVD Technology Development Addressed to the High Rate Deposition of mi-c-Si:H." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/98346.

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The first block of this thesis deals with the study of the degradation process of tungsten catalytic filaments in the field of silicon deposition with the Hot Wire Chemical Vapour Deposition (HWCVD) technique. The development of technological solutions addressed to the filaments protection will also be dealt as well as the design, fabrication and performance of a novel system for the automatic replacement of used filaments in a HWCVD reactor. The second block deals with the scaling up of HWCVD towards large area deposition and the existence of a scaling law that may allow the deposition of mic

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17

Guardiola, Salmerón Consuelo. "Novel silicon sensors for neutron detection." Doctoral thesis, Universitat Autònoma de Barcelona, 2012. http://hdl.handle.net/10803/117536.

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La detección precisa y la dosimetría de neutrones en campos de radiación mixtos y pulsados es un tema instrumental demandado con gran interés por las comunidades médica e industrial. Estudios recientes de la contaminación de neutrones alrededor de los aceleradores lineales médicos han aumentado la preocupación sobre el riesgo de cáncer secundario en pacientes sometidos a tratamiento de radioterapia en las modalidades de fotones con energías superiores a 8 MeV. En respuesta a esa necesidad, en esta tesis se ha desarrollado una innovadora alternativa a los detectores estándares con un método act

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18

Wilson, Jon H. "Silicon surfaces : STM, theory and experiment." Thesis, University of Oxford, 1991. http://ora.ox.ac.uk/objects/uuid:64998ae3-9316-42b5-967f-da93ff2bfd6c.

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The fundamental atomic and electronic behaviour of clean silicon surfaces has been studied within a simple tight-binding picture of bonding in solids. Of the various contributions to the surface binding energy, the lowering in the promotion energy (i.e. rehybridization) which accompanies localized Jahn-Teller distortions has been identified as a major electronic driving force underlying the stability of silicon surfaces. The structure of Si(113) has been experimentally determined by the technique of scanning tunnelling microscopy (STM). Despite its high index, the Si(113) surface is found to b

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19

Llobera, Adan Andreu. "Integrated Optics Technology on Silicon: Optical Transducers." Doctoral thesis, Universitat Autònoma de Barcelona, 2002. http://hdl.handle.net/10803/3342.

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El camp de l'òptica integrada es presenta com un dels mes prometedors a curt-mig plaç degut als clars avantatges que presenta amb respecte de l'electrònica tradicional. El fet d'utilitzar la llum com a medi vehicular, la qual no es veu afectada per les possibles pertorbacions electromagnètiques, entre altres propietats, fan que aquest camp sigui una de les sortides mes viables als greus problemes de congestió de les vies de telecomunicacions que es preveuen en un futur proper. Per altra part, l'ús de l'òptica integrada per a la realització de sensors ofereix unes prestacions superiors a la maj

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20

Han, Tingting. "Highly active and efficient metal-decorated silicon-based nanostructured photoelectrodes for water splitting solar cells." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/670880.

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With the burning of large amounts of traditional fossil fuels, global environmental pollution is getting worse and worse, and energy crisis is becoming more serious for meeting human’s life demand. In order to solve these problems, it’s imperative to find renewable and clean energy sources. Although solar is one of the most abundant renewable energy on earth, it’s difficult to collect and store. As a non-polluting energy, hydrogen is a highly promising candidate to replace fossil fuels. Sunlight can be used to split water into hydrogen, producing chemical energy stored in

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21

Jerez, Briones Jorge Antonio. "Aluminosilicate-coated silica sand for reactive transport experiments." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Dissertations/Spring2005/J-J%5FBriones%5F050305.pdf.

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Rurali, Riccardo. "Theoretical studies of defects in silicon carbide." Doctoral thesis, Universitat Autònoma de Barcelona, 2003. http://hdl.handle.net/10803/3355.

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Cálculos de estructura electrónica han sido utilizados para el estudio de la estructura, de la difusividad y de la actividad eléctrica de defectos puntuales en carburo de silicio. En particular, se han considerado impurezas de tipo n y de tipo p, boro, nitrógeno y fósforo, juntas con defectos intrínsecos, como las vacantes del cristal.<br/>El proceso de transient enhanced diffusion del boro ha sido estudiado y se ha propuesto una descripción microscópica del mismo: el kick-out realizado por un auto-intersticial de silicio cercano ha resultado ser el responsable de la metaestabilidad del de ot

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23

Cho, Chun Hyung Jaeger Richard C. Suhling J. C. "Experimental characterization of the temperature dependence of the piezoresistive coefficients of silicon." Auburn, Ala., 2007. http://repo.lib.auburn.edu/Send%2002-04-08/CHO_CHUN_21.pdf.

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24

Coux, González Patricia de. "Integration of ferrimagnetic CoFe2O4 epitaxial films with silicon." Doctoral thesis, Universitat Autònoma de Barcelona, 2013. http://hdl.handle.net/10803/129162.

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El continuo progreso en microelectrónica se debe al crecimiento exponencial con el tiempo del número de transistores por circuito integrado, dependencia conocida como ley de Moore. Esta ley se sigue cumpliendo, pero se va acercando a límites intrínsecos. Por ello ha emergido la alternativa “More tan Moore”, un enfoque complementario basado en conceptos radicalmente nuevos y en la introducción de nuevos materiales que mejoren las prestaciones de dispositivos. En particular, los óxidos funcionales representan una buena oportunidad para incrementar y desarrollar las respuestas de dispositivos de

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25

Vázquez, Furelos David. "3D pixel sensors for the high luminosity LHC ATLAS detector upgrade." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/669548.

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Maughan, C. N. "Experimental and in silico computational studies of novel nanoparticle vaccine adjuvants." Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/1546603/.

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This thesis applies inorganic chemistry to develop new nanoparticulate vaccine adjuvants, entities added to a vaccine to inculcate robust immunity. The Introduction sets out the background to this work, and the Experimental Methods chapter reviews the techniques applied. Chapter 3 then reports the preparation of AlO(OH) using a continuous hydrothermal synthetic pathway – with sub-100 °C temperatures and atmospheric pressure – to produce nanoscale particles. A variety of experimental parameters was explored, and some degree of particle engineering could be achieved albeit over a narrow range of

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Sayedi, Sayed-Masoud. "Experimental investigations of corona-discharge oxidation of silicon." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0006/NQ40319.pdf.

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Stubley, Paul G. "Experimental studies and simulations of shock-compressed silicon." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:69abe674-450e-4379-be81-f6e0ebf40edb.

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The response of silicon to shock-compression has been an area of active research for decades. However, despite considerable improvements in both experimental techniques and computer simulations, the behaviour has not been unanimously constrained. This work introduces a new Lagrangian Elastic code which aims to approach the modelling of solids from a different direction to traditional hydrodynamics codes. We present data from a white-light Laue diffraction experiment, which along with molecular dynamics simulations, suggest that a kinetically inhibited phase-change may be indirectly responsible

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Gorostiza, Langa Pablo Ignacio. "Metal Deposition on Silicon from Fluoride Solution." Doctoral thesis, Universitat de Barcelona, 2000. http://hdl.handle.net/10803/1504.

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Metallic deposits can be produced on the surface of silicon crystals by immersion in aqueous solutions containing fluoride and the metallic ions. This work aims to elucidate the general mechanism of the deposition process, based on "in situ" electrochemical measurements under potentiostatic control and "ex situ" microscopic and spectroscopic techniques. The mechanism developed takes into account the classical concepts of semiconductor electrochemistry, as well as the recent advances in the understanding of silicon chemistry. The consequences of this study and its technological applications a

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Naseh, Sasan. "Experimental investigation of anisotropic etching of silicon in tetra-methyl ammonium hydroxide." Thesis, Connect to online version, 1995. http://0-wwwlib.umi.com.mercury.concordia.ca/cr/concordia/fullcit?pMQ90888.

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Obregón, Rodríguez Yris del Pilar. "Verificación teórica y experimental de las monocapas auto-ensambladas de Bromoalquilo en superficies hidrogenadas de Si(100)." Master's thesis, Pontificia Universidad Católica del Perú, 2018. http://tesis.pucp.edu.pe/repositorio/handle/123456789/12275.

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La formación de monocapas orgánicas auto-ensambladas en superficie de silicio es una alternativa prometedora para el desarrollo de nuevos materiales, cuyas propiedades fisicoquímicas controlan la estructura electrónica, de manera que puedan ser usados como componentes electrónicos en biosensores, diodos orgánicos, dispositivos de almacenamiento de memoria, fotodetectores y sensores ópticos, entre otras aplicaciones diversas. Gracias a la gran estabilidad energética en los enlaces covalentes de Si-C, se logra verificar mediante modelos teóricos la predicción de los ángulos de contacto de la ads

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Ramírez, Joan Manel. "Rare Earth-Doped Silicon-Based Light Emitting Devices: Towards new Integrated Photonic Building Blocks." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/299365.

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This thesis presents the work carried out towards the implementation of RE-doped Si-based light emitting devices as integrated optoelectronic building blocks for Silicon Photonics. This work spans from the fundamentals such as the structure, the morphology of active layers containing Si-ncs and/or RE ions or the origin of the EL emission under different voltage excitations, to the development of advanced Si-based light emitting devices, providing insights on the device design, mask layout, device fabrication and the optoelectronic characterization. Also, novel layer architectures are proposed

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González, Fernández Alfredo A. "Studies and integration of Silicon-based light emitting systems." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/285863.

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This project presents the study of luminescent devices and materials based on silicon for its use in the fabrication of an optical system that integrates light emitter, waveguide, and light sensor in a single chip obtained by the use of standard CMOS techniques and materials. The atomic and structural characteristics of the materials are analysed and related to its luminescent response. Taking into account the results from the active material characterization, the design, fabrication, and characterization of electroluminescent devices based on such materials is presented. Finally, the design,

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Berencén, Ramírez Yonder Antonio. "Rare earth- and Si nanostructure-based light emitting devices for integrated photonics." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/285453.

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This thesis presents experimental work on developing rare-earth ions and Si nanostructures as a material platform for light emitting devices (LEDs) in the visible and near-infrared range. The realization of the different electroluminescent devices, based on a single, bi- or tri-layer approach of silicon oxide and/or silicon nitride co-doped or not with rare earth ions, is successfully performed. Several complementary metal-oxide-semiconductor (CMOS) compatible fabrication techniques such as co-magnetron sputtering, plasma-enhanced chemical vapor deposition (PECVD), low-pressure chemical vapor

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Balbuena, Valenzuela Juan Pablo. "Development of innovative silicon radiation detectors." Doctoral thesis, Universitat Autònoma de Barcelona, 2011. http://hdl.handle.net/10803/96361.

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Silicon radiation detectors fabricated at the IMB-CNM (CSIC) Clean Room facilities using the most innovative techniques in detector technology are presented in this thesis. TCAD simulation comprises an important part in this work as becomes an essential tool to achieve exhaustive performance information of modelled detectors prior their fabrication and subsequent electrical characterization. Radiation tolerance is also investigated in this work using TCAD simulations through the potential and electric field distributions, leakage current and capacitance characteristics and the response

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Lyu, Jike. "Epitaxial Ferroelectric Thin Films on Si(001): strain tuning of BaTiO3 and stabilization of polar phase in Hf0.5Zr0.5O2." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/667989.

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Long, Theresa A. "Sol-gel routes for surface/sheath structures on carbon fibers : exploratory experiments with silica." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/11792.

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Chávez, Ángel Emigdio. "Confined acoustic phonons in si nanomembranes: impact on thermal properties." Doctoral thesis, Universitat Autònoma de Barcelona, 2014. http://hdl.handle.net/10803/284871.

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La tendencia de la miniaturización tecnológica ha conducido a la generación de densidades de potencia que exceden los 100 watts/cm2, los cuales están en el orden del calor producido en los reactores termonucleares. La necesidad de nuevas técnicas y procesos de enfriamiento ha posicionado al manejo térmico en el escenario científico en estos últimos años. Por otro lado, la ingeniería de la conducción térmica puede abrir rutas nuevas rutas para recolección energética, por ejemplo, a través de la generación termoeléctrica. Como consecuencia, el control y la ingeniería de fonones a nivel nanométri

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Arnoldsson, Joel. "Adsorption Chillers : uptake of Ethanol on Type RD Silica gel." Thesis, Linköpings universitet, Energisystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-80930.

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The adsorption cooling technology has the potential to replace all vapor compression based chillers in the future. So, in all over the world immense researches are going on in this field. The purpose of this report is to experimentally investigate whether ethanol could serve as a refrigerant in the technology. Compared to water it has freezing point below 0 °C (-114.1 °C) and can therefore in theory be used in refrigeration applications. The report begins with the theory regarding the adsorption cooling process, describing the cycle and parameters that affect the Coefficient of Performance (CO

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Henriksen, Lisa Grav. "Pump-probe experiments of multicrystalline silicon for solar cell applications." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for fysikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19207.

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In order to make cost effective solar cells from mc-Si materials, the negative contributions from defects and impurities should be reduced. The analysis of the photogenerated carrier properties is therefore of great importance for characterising carrier processes and hence, for improving the material performance.In this work, pump-probe measurement of a range of silicon wafers have been performed, using anultrafast laser of 800 nm wavelength and 85 fs pulses. The optical response in the samples were analysed by measuring the reflected probe beam initial transient.The purpose of this theses was

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Ren, Yuxing. "Experiments on the elastic size dependence of LPCVD silicon nitride /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?MECH%202004%20REN.

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Katardjiev, I. V. "Theory and experimental studies of surface evolution during ion bombardment." Thesis, University of Salford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234793.

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Pérez, Tomàs Amador. "Novel materials and processes for gate dielectrics on Silicon carbide." Doctoral thesis, Universitat Autònoma de Barcelona, 2005. http://hdl.handle.net/10803/3381.

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There is considerable evidence of the need for a semiconductor technology which exceeds the limitations imposed by silicon across a wide spectrum of industrial applications. Wide bandgap semiconductor, such as silicon carbide (SiC), gallium nitride (GaN) and diamond, offer the potential to overcome both the temperature and voltage blocking limitations of Si. SiC is nowadays the most attractive candidate, offering significant potential advantages at both high temperature and high voltage levels whilst benefiting from tractable materials technology. Moreover, SiC is the only that can be thermall

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Zhang, Zihao S. B. Massachusetts Institute of Technology. "Experimental evaluation of heat transfer characteristics of silica nanofluid." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/60213.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.<br>"June 2010." Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 62-63).<br>The laminar convective heat transfer characteristics were investigated for silica nanofluid. An experimental loop was built to obtain heat transfer coefficients for single-phase nanofluids in a circular conduit in laminar flow regime. Thermal conductivity and viscosity measurements were conducted on the silica nanofluid to determine the thermophysical properties needed for analysis. Qualitative t

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Subramanian, Swaminathan. "Experimental determination of structure factors of TiAl and silicon." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1241098408.

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Solà, Rabadà A. "Experimental studies of zinc oxide and silica peptide interactions." Thesis, Nottingham Trent University, 2016. http://irep.ntu.ac.uk/id/eprint/28043/.

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In nature, mineral-forming organisms achieve outstanding control over the assembly and properties of minerals. Understanding interactions during biomolecule-mediated synthesis is key to addressing the challenges that arise when designing new materials and synthesizing superior nanostructures, especially under aqueous conditions. The studies of peptide-mineral interactions presented in this thesis aimed to identify the peptide-surface affinity and its binding mechanism(s) as well as the effect of peptides on mineral formation by in vitro studies. The minerals; crystalline zinc oxide (ZnO) and a

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Fonrodona, Turon Marta. "Progress in Hot-Wire deposited nanocrystalline silicon solar cells." Doctoral thesis, Universitat de Barcelona, 2003. http://hdl.handle.net/10803/1766.

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The tendency towards cost reduction in the photovoltaic industry has led to the development of the so-called thin film silicon technology. Among the different possible morphologies, a material that presents very promising features is nanocrystalline silicon (nc Si:H), which consists in an aggregate of crystallites with sizes in the order of few tens of nanometers embedded in an amorphous matrix. The deposition technique used at Universitat de Barcelona to grow nc-Si:H solar cells is Hot-Wire Chemical Vapour Deposition (HWCVD), which features several advantages in comparison with Plasma Enhanc

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Thornell, Mark E. "Sample fabrication and experimental design for studying interfacial creep at thin film/silicon interfaces." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FThornell.pdf.

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Scardera, Giuseppe ARC Centre of Excellence in Advanced Silicon Photovoltaics &amp Photonics Faculty of Engineering UNSW. "Correlating structural and optical properties of silicon nanocrystals embedded in silicon nitride: An experimental study of quantum confinement for photovoltaic applications." Publisher:University of New South Wales. ARC Centre of Excellence in Advanced Silicon Photovoltaics & Photonics, 2008. http://handle.unsw.edu.au/1959.4/41472.

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Silicon nanocrystals embedded in silicon nitride have received attention as promising materials for optoelectronic applications. More specifically, band gap engineering of novel materials based on silicon nanocrystals has been proposed for possible application in an all-silicon tandem solar cell within the field of `third generation' photovoltaics. Such an application would require nanocrystals to exhibit quantum confinement whereby the optical and electrical properties of a film could be tuned by controlling the size of these `quantum dots'. This thesis investigates the correlation between th

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Benmessaoud, Alí. "Caracterización de subóxidos de silicio obtenidos por las técnicas de PECVD." Doctoral thesis, Universitat Autònoma de Barcelona, 2001. http://hdl.handle.net/10803/3336.

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Se ha escogido la técnica PECVD para obtener depósitos de subóxido de silicio, SiOx, de espesores del orden de la micra, sobre substratos de Si de dos pulgadas. Hemos logrado depósitos con contenidos de oxígeno entre 1.3 y 2.0, y un intervalo de índices de refracción comprendidos entre 1.96 (próximo al Si3N4) y 1.46 (SiO2). La estructura (en particular, la porosidad), uniformidad y tensión de las capas son mejores cuanto menor es el contenido de oxígeno. Además, las capas crecidas contienen impurezas en forma de enlaces Si-H, N-H, Si-OH y H2O. El contenido de impurezas varia de forma gradual

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