Дисертації з теми "Microfabricatin"
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Feng, Chunhua. "Microfabrication-compatible synthesis strategies for nanoscale electrocatalysts in microfabricated fuel cell applications /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?CENG%202007%20FENG.
Повний текст джерелаGrebille, Bénédicte. "Photopolymérisation radicalaire contrôlée par ATRP : études mécanistiques, applications en sciences des matériaux et perspectives en microfabrication." Electronic Thesis or Diss., Lyon, École normale supérieure, 2024. http://www.theses.fr/2024ENSL0017.
Повний текст джерелаIn the early 20th century, the physico-chemist Giacomo Luigi Ciamician, highlighted the benefits of using light as a suitable energy source for chemical reactions. At the end of this same century, the discovery of controlled radical polymerization, in particular ATRP (Atom Transfer Radical Polymerization), marked a major advance in polymer chemistry. This technique has been widely developed and used in a variety of fields, including surface functionalization through Surface Initiated ATRP (SI-ATRP), with applications ranging from biology to materials engineering. The main aim of this thesis is to explore the use of photoinduced ATRP in microprinting. For this purpose, a new multicomponent system for photoinduced ATRP has been developed and studied in detail from a physicochemical point of view. The thorough understanding of each component impact of the system has enabled to reach highly controlled polymerization under a wide variety of conditions, including in the open air. Moreover, this system, which includes a photosensitizer capable of two-photon absorption, has been used for a variety of purposes. It has been used to perform surface-initiated ATRP both in an inert atmosphere and in the presence of dioxygen. The optimization of the surface functionalization technique was used for microprinting. Furthermore, this multicomponent system facilitated the synthesis, by photoinduced ATRP from a new macrophotoinitiator, of water-soluble photosensitizers with interesting biphotonic absorption properties. This family of macromolecules has proved to be effective in photoinitiating emulsion polymerization, paving the way for two-photon photoinduced emulsion polymerization and potentially also to hydrogels microprinting
Altay, Gizem. "Towards the development of biomimetic in vitro models of intestinal epithelium derived from intestinal organoids." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/664864.
Повний текст джерелаEl epitelio intestinal es un tejido altamente especializado, organizado en unidades de criptas y vellosidades que son relevantes para sus eficaces funciones de barrera y absorción de nutrientes. En las unidades de criptas residen las células madre intestinales (ISC) proliferativas que se dividen y diferencian mientras migran a lo largo de las vellosidades, las cuales generan el epitelio maduro. En el epitelio maduro, las ISC y las células proliferativas se localizan en las criptas y las células absorbentes y secretoras diferenciadas en las vellosidades. La proliferación, migración y diferenciación de las ISC se rigen por los gradientes químicos espaciales altamente controlados de los factores de nicho de la ISC; Moduladores de la vía de bone morphogenic protein (BMP), wingless/Int (Wnt) y epidermal growth factor (EGF). El modelado experimental de la biología y la fisiología del epitelio intestinal está limitado debido a la falta de plataformas in vitro que recapitulan estos aspectos clave del epitelio del intestino delgado: sus distintas poblaciones celulares, la arquitectura 3D y los gradientes de factores bioquímicos de nicho ISC a lo largo del eje cripta-vellosidad. Aquí, describimos el desarrollo de modelos in vitro de epitelio intestinal obtenidos de criptas derivadas de organoides intestinales. En primer lugar, presentamos un método para obtener monocapas epiteliales intestinales 2D con lumen accesible y función de barrera fisiológica. A continuación, describimos el desarrollo de andamios biomiméticos 3D similares a vellosidades en hidrogeles de diacrilato de polietilenglicol (PEGDA) utilizando un enfoque fotolitográfico simple y rentable. Demostramos que nuestra plataforma de vellosidades sintéticas apoya la formación de monocapas epiteliales de células epiteliales intestinales derivadas de organoides. Finalmente, describimos métodos para crear gradientes espaciotemporales de factores nicho bioquímicos ISC en hidrogeles 3D similares a vellosidades y demostramos que estos gradientes se pueden usar para compartimentar las células epiteliales diferenciadas. La plataforma 3D que recrea las vellosidades intestinalesmejora los modelos actuales al proporcionar a las células las señales topográficas y mecánicas y los gradientes bioquímicos fisiológicamente representativos. Debido a su utilidad, esta plataforma puede encontrar innumerables aplicaciones. Puede ser utilizada para la comprensión de la biología básica del epitelio intestinal. Además, se puede utilizar para cultivar células madre intestinales humanas que permitan la detección de nuevas terapias y el modelado de enfermedades.
Caballero, Lucas Francesc. "Z-scan methods for ultrashort pulsed laser microprocessing of transparent materials." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/668185.
Повний текст джерелаL’ús de làsers d’impulsos ultracurts ha rebut atenció recentment degut al reconeixement amb el Premi Nobel de Física de l’any 2018 a la tècnica que en permet la seva generació. Les seves àrees d’aplicació encara no han estat completament explorades, però les seves possibilitats per accedir al món microscòpic són considerades prometedores. Seguint aquest esperit, l’objectiu d’aquesta tesi és proposar i implementar solucions viables als reptes relacionats amb la microfabricació de materials amb impulsos làser ultracurts, específicament l’ablació làser de polímers transparents amb resolucions espacials que transcendeixin les limitacions de definició associades a la difracció de la llum. INTRODUCCIÓ I OBJECTIUS: Aquest capítol descriu les tècniques de microfabricació més significatives, centrant-se en els mètodes làser. Degut al paper clau del làser en aquesta tesi, es fa una descripció breu de la interacció entre la radiació làser i la matèria. Els objectius plantejats completen aquest primer capítol. EXPERIMENTAL: En aquest apartat es presenta una descripció dels muntatges experimentals amb sistemes làser de duració ultracurta, els mètodes i els materials emprats durant les proves que constitueixen la recerca i que serveixen de base per a la presentació del mètode d’enfocament z-scan. MÈTODE D’ENFOCAMENT Z-SCAN: Els resultats obtinguts amb la tècnica proposada d’enfocament per z-scan són presentats aquí. El tema central és el desenvolupament i caracterització d’aquesta tècnica com a mètode per l’ablació superficial de materials transparents amb impulsos làser ultracurts. La implementació exitosa de l’ablació superficial del polimetilmetacrilat (PMMA) amb elevada resolució espacial demostra la viabilitat de l’estratègia proposada per enfocar amb precisió un feix làser a la superfície de materials transparents. APLICACIONS PER AL MICROPROCESSAMENT LÀSER DE MATERIALS: La implementació de la tècnica desenvolupada d’enfocament per z-scan s’ha pogut traslladar al microprocessament de materials amb làser en diverses aplicacions com la irradiació de polímers biodegradables per a la producció de forats profunds en àcid polílàctic (PLA), la seva influència en la biodegradabilitat de l’àcid polílàctic-co-glicòlic (PLGA), la perforació de fuites en bosses de polipropilè d’ús mèdic, i la fabricació de guies microfluídiques per la impressió de línies conductores. Conclusions: L’últim capítol resumeix els resultats més rellevants i els principals assoliments.
Cannon, Andrew Hampton. "Unconventional Microfabrication Using Polymers." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/19845.
Повний текст джерелаFlorian, Baron Camilo. "Laser direct-writing for microfabrication." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/400403.
Повний текст джерелаLa fabricació digital de dispositius tecnològics requereix el desenvolupament de noves i millors tècniques per al microprocessament de materials que al mateix temps siguin compatibles amb mètodes de producció en sèrie a gran escala com el roll-to-roll processing. Aquestes tècniques han de complir certs requisits relacionats amb la possibilitat de realitzar canvis de disseny ràpids durant el procés de fabricació, alta velocitat de processament, i al mateix temps permetre la producció de motius de forma controlada amb altes resolucions espacials. En la present tesi es proposen i implementen solucions viables a alguns dels reptes presents a la microfabricació amb làser tant substractiva com additiva. D'una banda, es presenta un nou mètode d'enfocament del feix làser sobre la mostra per l'ablació superficial de materials transparents que permet obtenir resolucions espacials que superen el límit de difracció del dispositiu òptic. D'altra banda, es duu a terme un estudi de la dinàmica de la impressió de líquids mitjançant làser a alta velocitat, de gran interès de cara a la implementació industrial de la tècnica. A més, es presenten estratègies d'impressió de tintes conductores amb l'objectiu de produir línies contínues amb alta qualitat d'impressió. Finalment s'inclouen dues propostes que són producte de la combinació d’ambues tècniques, la impressió de líquids i l'ablació amb làser.
Wang, Weihua. "Tools for flexible electrochemical microfabrication /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/9854.
Повний текст джерелаBarham, Oliver M. "Microfabricated Bulk Piezoelectric Transformers." Thesis, University of Maryland, College Park, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10615552.
Повний текст джерелаPiezoelectric voltage transformers (PTs) can be used to transform an input voltage into a different, required output voltage needed in electronic and electro- mechanical systems, among other varied uses. On the macro scale, they have been commercialized in electronics powering consumer laptop liquid crystal displays, and compete with an older, more prevalent technology, inductive electromagnetic volt- age transformers (EMTs). The present work investigates PTs on smaller size scales that are currently in the academic research sphere, with an eye towards applications including micro-robotics and other small-scale electronic and electromechanical sys- tems. PTs and EMTs are compared on the basis of power and energy density, with PTs trending towards higher values of power and energy density, comparatively, indicating their suitability for small-scale systems. Among PT topologies, bulk disc-type PTs, operating in their fundamental radial extension mode, and free-free beam PTs, operating in their fundamental length extensional mode, are good can- didates for microfabrication and are considered here. Analytical modeling based on the Extended Hamilton Method is used to predict device performance and integrate mechanical tethering as a boundary condition. This model differs from previous PT models in that the electric enthalpy is used to derive constituent equations of motion with Hamilton’s Method, and therefore this approach is also more generally applica- ble to other piezoelectric systems outside of the present work. Prototype devices are microfabricated using a two mask process consisting of traditional photolithography combined with micropowder blasting, and are tested with various output electri- cal loads. 4mm diameter tethered disc PTs on the order of .002cm
3 , two orders smaller than the bulk PT literature, had the followingperformance: a prototype with electrode area ratio (input area / output area) = 1 had peak gain of 2.3 (± 0.1), efficiency of 33 (± 0.1)% and output power density of 51.3 (± 4.0)W cm
-3 (for output power of80 (± 6)mW) at 1M? load, for an input voltage range of 3V-6V (± one standard deviation). The gain results are similar to those of several much larger bulk devices in the literature, but the efficiencies of the present devices are lower. Rectangular topology, free-free beam devices were also microfabricated across 3 or- ders of scale by volume, with the smallest device on the order of .00002cm
3 . These devices exhibited higher quality factorsand efficiencies, in some cases, compared to circular devices, but lower peak gain (by roughly 1/2 ). Limitations of the microfab- rication process are determined, and future work is proposed. Overall, the devices fabricated in the present work show promise for integration into small-scale engi- neered systems, but improvements can be made in efficiency, and potentially voltage gain, depending on the application
Mehregany, Mehran. "Microfabricated silicon electric mechanisms." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/14042.
Повний текст джерелаIncludes bibliographical references (leaves 151-156).
by Mehran Mehregany.
Ph.D.
Griffith, Alun Wyn. "Applications of microfabrication in biosensor technology." Thesis, University of Glasgow, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361768.
Повний текст джерелаJeffery, Nicholas Toby. "PET radiochemistry on microfabricated devices." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420892.
Повний текст джерелаVelásquez, García Luis Fernando 1976. "A microfabricated colloid thruster array." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/82201.
Повний текст джерелаLubratt, Mark Paul. "A voltage-tunable microfabricated accelerometer." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/37497.
Повний текст джерелаHarris, Robert Michael. "Geometric simulation of microfabricated structures." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11842.
Повний текст джерелаIncludes bibliographical references (p. 295-302).
Robert Michael Harris.
Ph.D.
Duan, Xuefeng 1981. "Microfabrication : using bulk wet etching with TMAH." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97942.
Повний текст джерелаThe content of microfabrication is quite broad, and also very useful in both industry and academic. Since our fab is a newly built one and I had no experience in this area before, this thesis mainly included some basic processes in microfabrication, such as the photolithography, wet etching, reactive ion etching, and soon. Also it compared the wet etching with dry etching. Some results of TMAH wet etching were showed in the thesis, which agreed well with that of the other groups. A simulation program was developed to predict the etching result of TMAH and it appeared to work well. Finally, based on the knowledge and experience acquired, processes in making cantilever and tip structures, which are critical in the scanning probe microscopes, were developed. Silicon oxide cantilevers with length of 100-200 mum, width of 30-50 mum, and thickness of 1 mum were obtained. Pyramid like silicon tips were also fabricated using the wet etching.
DiBartolomeo, Franklin. "HIGH SPEED CONTINUOUS THERMAL CURING MICROFABRICATION SYSTEM." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_theses/105.
Повний текст джерелаCharlton, Martin David Brian. "Computational design and microfabrication of photonic crystals." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287304.
Повний текст джерелаZoorob, Majd Elias. "Computational design and microfabrication of photonic quasicrystals." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342813.
Повний текст джерелаShur, Maiya 1980. "Microfabrication methods for the study of chemotaxis." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/27130.
Повний текст джерелаIncludes bibliographical references (leaves 59-60).
We have developed a system for studying chemotaxis in a microfabricated system. The goal was to develop a system capable of generating spatially and temporally stable concentration gradients of a chemotactic molecule while providing a viable environment for the cell. Numerical models were generated to investigate fluid flow in microchannels for given geometries. Through computational modeling and experimentally-driven iteration of the design, features of the chamber were determined and geometry was established. Prototypes of the system were fabricated using soft lithography and multi-layer soft lithography techniques. Three fluid delivery methods for establishing gradients in the system have been studied: gravity feed system, dual-syringe pump feed system, and integrated individually-controlled peristaltic pump feed system. We were able to create spatially and temporally stable gradients using the dual-syringe feed setup. Two syringes were used to pump a chemokine and a buffer in parallel channels that are connected by a cross-channel and terminated to a single output. Microbeads in the flow were used to confirm the lack of movement in the cross-channel. Human neutrophil viability over the course of several hours and directed cell movement was demonstrated in microchannels.
by Maiya Shur.
S.M.
Tu, Yudi. "Photo Processing and Microfabrication of Graphene Oxide." Kyoto University, 2018. http://hdl.handle.net/2433/232039.
Повний текст джерелаLund, Jason Matthew. "Advanced Techniques for Carbon Nanotube Templated Microfabrication." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7769.
Повний текст джерелаGuan, Jingjiao. "Microfabricated particulate devices for drug delivery." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1118247862.
Повний текст джерелаTitle from first page of PDF file. Document formatted into pages; contains xxiii, 163 p.; also includes graphics. Includes bibliographical references (p. 118-123). Available online via OhioLINK's ETD Center
McAllister, Devin Vincent. "Microfabricated needles for transdermal drug delivery." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/11031.
Повний текст джерелаHenry, Sʹebastien. "Microfabricated device for transdermal drug delivery." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/20707.
Повний текст джерелаSteyn, J. Lodewyk (Jasper Lodewyk) 1976. "A microfabricated ElectroQuasiStatic induction turbine-generator." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32463.
Повний текст джерелаIncludes bibliographical references (p. [263]-268).
An ElectroQuasiStatic (EQS) induction machine has been fabricated and has generated net electric power. A maximum power output of 192 [mu]W at 235 krpm has been measured under driven excitation of the six phases. Self excited operation was also demonstrated. Under self-excitation, no external drive electronics are required and sufficient power was produced to dimly light four LED's on two of the six phases. This is believed to be the first demonstration of both power generation and self-excited operation of an EQS induction machine of any scale reported in the open literature. The generator comprises 5 silicon layers, fusion bonded together, and annealed at 700⁰C. The turbine rotor, 4 mm in diameter, is supported on gas bearings. The thrust bearings are formed by a shallow etch of 1.5 [mu]m to define the thrust bearing gap. Thrust bearing pressurization is through 10 [mu]m diameter nozzles, etched 100 [mu]m deep. The journal bearing is a precision, ... wide, 300 [mu]m deep annular trench around the periphery of the turbine disk. The generator airgap is 3 [mu]m. The inner radius of the generator is 1.011 mm, and the outer radius 1.87mm. The machine has ].31 poles for each of the 6 phases, for a total of 786 stator electrodes. Precise microfabrication and aligned, full-wafer fusion bonding enabled turbine generator devices to be operated at rotational speeds as high as 850 krpm. A detailed state-space model of the EQS machine and its external parasitics is presented. The external stray capacitances, and their unbalance, play a critical role in the performance of the device. A method for estimating the strays experimentally is discussed.
(cont.) This estimated, updated model made it possible to use computer optimization techniques to find the optimal drive conditions for the device to generate maximum power. Carrier depletion in the moderately doped polysilicon rotor conductor film prevented the generator from producing power at higher voltages, and limited the maximum machine terminal voltage under self-excitation to approximately 30 Vp-p.
by Jasper Lodewyk Steyn.
Ph.D.
Muller, Rikky 1980. "A microfabricated dielectrophoretic micro-organism concentrator." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28393.
Повний текст джерела"May 2004."
Includes bibliographical references (leaves 83-85).
This project focuses on the development of a micro-organism concentrator. Pathogen detection, particularly MEMS based detection, is often limited by sample concentration. The proposed concentrator will interface with a pathogen detector. This type of pathogen concentrator can be useful for many kinds of applications including water purification systems, medical applications and biological warfare agent detection. Due to the nature of these applications, the concentrator must be able to operate under real-world conditions, and be robust to particulates and variations in solution conductivity. The concentrator is an active filter, which concentrate bacteria in solution using negative dielectrophoresis, which pushes objects away from the electrodes toward field minima. An electric field barrier is set up to guide cells toward a concentrated outlet flow path while the bulk of the fluid, which permeates the electric field barrier, is sent to a waste outlet. The cells are collected at the outlet and selectively released by turning off the applied voltage. I have fully designed and modeled the characteristics of the proposed concentrator and successfully fabricated the design. I have characterized the system throughput using polystyrene beads and I have characterized the system electrically using lumped circuit element models.
by Rikky Muller.
M.Eng.and S.B.
Srinivasan, Ravi 1971. "Microfabricated reactors for partial oxidation reactions." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9865.
Повний текст джерелаMehta, Ankur 1983. "A microfabricated solid oxide fuel cell." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/27050.
Повний текст джерелаIncludes bibliographical references (p. 83-85).
With the ever-increasing ubiquity of mobile consumer electronic devices comes the rising demand for portable electric power. Current battery technology gives a very modest energy return per weight or volume. Hydrocarbons have a significantly higher energy density, and so fuel conversion systems only need to have several percent efficiency to match and surpass the specific energy of conventional batteries. Thus, there is a strong market for successful portable fuel powered electric generators. The goal of this thesis is to investigate the design of one such device, a two-chamber microfabricated solid oxide fuel cell (SOFC). This device produces electric current through the electrochemical oxidation of fuel through an ionic conductor. Oxide ions permeate across a ceramic electrolyte membrane to react with the fuel, driving electrons back around through the load. The focus of this work is to analyze the behavior of these membranes to prevent failure as the device is heated to its operating temperature near 800K. Experiments and analysis of free-standing electrolyte membranes indicate that failure is unavoidable over the required temperature range, and so supported structures are investigated. The results of experiments with a perforated nitride supported membrane presented herein indicate the need for a more thorough understanding of the thin film stresses responsible for membrane failure, as well as careful support structures to accommodate these. Designs for future devices are presented to improve stability and move closer to a final complete portable power system.
by Ankur Mehta.
S.B.
M.Eng.
Hsing, I.-Ming 1968. "Simulation strategies for microfabricated chemical systems." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/10061.
Повний текст джерелаLin, Chia-Hua. "A Microfabricated Deep Brain Stimulation Electrode." Case Western Reserve University School of Graduate Studies / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1244061398.
Повний текст джерелаGao, Yuanfang. "Microfabricated devices for single cell analysis." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4429.
Повний текст джерелаThe 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 May 1, 2009) Vita. Includes bibliographical references.
Stillman, Janet Allyn. "Three-dimensional microfabrication with laser-patterned photostructurable glass." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1779690371&sid=28&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Повний текст джерелаCantarella, Giuseppe. "Design, microfabrication and characterisation of Photonic Integrated Circuits." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=28500.
Повний текст джерелаSong, Mi Yeon. "Microfabrication of silicon tips for scanning probe microscopy." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/482/.
Повний текст джерелаHastings, Abel Z. 1973. "Assessing the viability of various metallic microfabrication techniques." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/8460.
Повний текст джерелаIncludes bibliographical references (p. 85-89).
An investigation was completed to assess the viability of a group of metallic microfabrication techniques aimed at the production of microelectromechanical systems (MEMS) This undertaking was done to show which methods hold the most promise for the near future. The methods investigated include LIGA, micromilling, jet molding, three dimensional printing, microcasting, micro-injection molding, metal injection molding, Microforming, and microextrusion. This study presents a technique overview, assembly issues, an applications survey, basic cost modeling and a survey of the relevant intellectual property.
by Abel Z. Hastings.
M.Eng.
Britton, Joe. "Microfabrication techniques for trapped ion quantum information processing." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337078.
Повний текст джерелаBoyer, Nathan Edward. "Microfabrication with Smooth, Thin CNT/Polymer Composite Sheets." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/5923.
Повний текст джерелаGhio, Simone. "Design and microfabrication of multifunctional bio-inspired surfaces." Doctoral thesis, Università degli studi di Trento, 2018. https://hdl.handle.net/11572/367604.
Повний текст джерелаGhio, Simone. "Design and microfabrication of multifunctional bio-inspired surfaces." Doctoral thesis, University of Trento, 2018. http://eprints-phd.biblio.unitn.it/2854/1/Thesis_GHIO_S..pdf.
Повний текст джерелаYang, Yanyin. "Synthesis, characterization, microfabrication and biological applications of conducting polymers." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1127316668.
Повний текст джерелаTitle from first page of PDF file. Document formatted into pages; contains xv, 192 p.; also includes graphics (some col.). Includes bibliographical references (p. 183-192). Available online via OhioLINK's ETD Center
Chien, Hsin-I. "Microfabrication of barium strontium titanate BaxSr(1-x)TiO3." Thesis, London South Bank University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618692.
Повний текст джерелаForsberg, Pontus. "Diamond Microfabrication for Applications in Optics and Chemical Sensing." Doctoral thesis, Uppsala universitet, Mikrosystemteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-192567.
Повний текст джерелаSterling, Robin C. "Ytterbium ion trapping and microfabrication of ion trap arrays." Thesis, University of Sussex, 2012. http://sro.sussex.ac.uk/id/eprint/39684/.
Повний текст джерелаLosey, Matthew W. "Novel multiphase chemical reaction systems enabled by microfabrication technology." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8634.
Повний текст джерелаIncludes bibliographical references (p. 237-251).
Advances in MEMS (micro-electromechanical systems) have enabled some of the "Lab-on-a-Chip" technologies and microfluidics that are pervasive in many of the current developments in analytical chemistry and molecular biology. Coinciding with this effort in micro-analytics has been research in chemical process miniaturization -- reducing the characteristic length scale of the unit operation to improve heat and mass transfer, and ultimately process performance. My research has involved the design and fabrication of novel chemical reaction systems using MEMS and microfabrication methods (photolithography, deep-reactive-ion etching, thin-film growth and deposition, and multiple wafer bonding). Miniature chemical systems provide the opportunity for distributed, on-demand manufacturing, which would eliminate the hazards of transportation and storage of toxic or hazardous chemical intermediates. Reactions that are particularly suitable for miniaturized chemical systems are those that are fast and involve toxic intermediates: the controlled synthesis of phosgene is such a reaction and has been demonstrated in a microfabricated packed bed reactor. Owing to the high surface-to-volume ratios, micro chemical systems also have the potential to make improvements in process performance through enhanced heat and mass transfer.
(cont.) Heterogeneously catalyzed gas-liquid reactions have been performed in the microfabricated reactors and have been shown to have mass transfer coefficients several orders of magnitude larger than their industrial-scale counterparts. Multiphase reactions are often hindered by mass-transfer limitations owing to the difficulty in transporting the gaseous reactant through the liquid to the catalytic surface. The microchemical device has been designed to increase the interfacial gas-liquid contacting area by promoting dispersion and preventing coalescence. Microfabrication allows the design of reactors with complicated fluidic distribution networks, staggered arrays of microstructural features to promote mixing, and the integration of sensing and temperature control. Other uses of microfabrication include the incorporation of porous silicon as a high surface area catalyst support. In all, performing multiphase chemistry on a chip has been demonstrated to have inherent advantages, particularly for those fast reactions that can benefit from improved mixing and mass transfer.
by Matthew W. Losey.
Ph.D.
Ge, Yufei S. M. Massachusetts Institute of Technology. "Microfabrication of surface electrode ion traps for quantum manipulation." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99280.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 123-132).
Trapped ions are a promising approach to quantum computation. This approach uses a qubit state which is the atomic state and quantum motional state of a trapped ion to encode information, and uses laser-ion interactions to manipulate the qubit state. A major obstacle to the realization of a practical ion trap quantum computer is decoherence. In trapped ion quantum computation experiments, decoherence is dominated by the uncontrolled heating of ion motional states. In this thesis, we present the detailed microfabrication of several series of surface electrode linear Paul traps made from different electrode materials, followed by the ion motional heating experiment results for these traps. We demonstrate that the ion motional heating strongly depends on fabrication process. In particular, we explore how grain size and grain orientation affect the ion motional heating rate. This thesis is divided into two parts. In the first part, we describe the fabrication of gold, silver, aluminum and niobium traps from different processes, which results in various surface morphologies and grain structures. Ion motional heating rate measurements are then conducted both at cryogenic temperatures and at room temperature. We employ a physical model based on the fluctuating patch potential theory to explain the ion heating behavior. We use gold traps to study the temperature and frequency dependence of the ion heating. We use aluminum traps to study the ion heating dependence on the amorphous dielectric layer. And we use silver traps to study the ion heating dependence on the grain structure. These results suggest that excess ion heating could possibly be suppressed by suitable fabrication selection. In the second part, we present the process of using SU8 to fabricate a multilayer surface electrode point Paul trap, which has the advantage of allowing ion height variation within the same trap and enables testing of the distance dependence of ion heating.
by Yufei Ge.
S.M.
Wasley, Thomas J. "Digitally driven microfabrication of 3D multilayer embedded electronic systems." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/23237.
Повний текст джерелаLe, Van Suu Thierry. "Etude analytique, conception et microfabrication de microphones capacitifs miniatures." Le Mans, 2008. http://cyberdoc.univ-lemans.fr/theses/2008/2008LEMA1016.pdf.
Повний текст джерелаDuring the last decade, capacitive acoustic pressure sensors fabricated on silicon chips was the subject of theoretical, experimental and technological studies, in order to design miniaturized microphones whose interest in many applications would be of importance. These studies concentrate on the devices classically designed, namely on the modelling and on the micro machining of devices comprising a diaphragm (considered as a membrane), a planar perforated (or not) backing electrode, and a viscous and thermalconducting fiuid trapped between both and/or enclosed by a peripheral reservoir. Ln many respects, the work presented in this PhD thesis is an extension of those carried out for several years in laboratories around the world, including the Laboratoire d'Acoustique de l'Université du Maine. A new design in which the backing electrode is non-planar has been proposed recently in the literature. A standard analytic procedure yielded simple expression for the sensitivity of the microphone, whose the limitations can be pointed out when a precise solution is needed. Therefore herein, a general solution is proposed, which accounts for the coupling between the membrane and the fiuid layer in a more realistic way. On the other hand, the diaphragm is usually assumed to be circular and/or to behave as a membrane. The aim of the second chapter of the analytical studies presented here is to propose solutions for square loaded plates, including extensions for stretched ribbon, leading to awaited results. The second part of the thesis is twofold : -i) a miniaturised microphone, made using the micro machining pro cesses available in the clean room facility at ENSIM, has been designed and the main process steps have been validated, -ii) an experimental method for measuring simultaneously the Young's modulus and the residual stress is suggested and validated, supplanting in our opinion other known methods which usually provide only one of these two parameters (assuming that the other one is known)
Hou, Linlin. "Advanced 3D Microfabrication and Demonstration of Arrayed Electrowetting Microprisms." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1328546291.
Повний текст джерелаPeeni, Bridget A. "Microfabrication and evaluation of planar thin-film microfluidic devices /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1564.pdf.
Повний текст джерелаLe, Van Suu Thierry Bruneau Michel Durand Stéphane. "Etude analytique, conception et microfabrication de microphones capacitifs miniatures." [S.l.] : [s.n.], 2008. http://cyberdoc.univ-lemans.fr/theses/2008/2008LEMA1016.pdf.
Повний текст джерела