Дисертації з теми "K Surface"
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Kirsch, Paul Daniel. "Surface and interfacial chemistry of high-k dielectric and interconnect materials on silicon." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3034557.
Повний текст джерелаTong, Jinhong. "Study of Interactions Between Diffusion Barrier Layers and Low-k Dielectric Materials for Copper/Low-k Integration." Thesis, University of North Texas, 2003. https://digital.library.unt.edu/ark:/67531/metadc4384/.
Повний текст джерелаGenevaux, Pierre. "Genetic and phenotypic analysis of Escherichia coli k-12 adhesion to inanimate surface." Metz, 1998. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1998/Genevaux.Pierre.SMZ9860.pdf.
Повний текст джерелаL'adhésion bactérienne sur des surfaces artificielles est un aspect fondamental de l’écologie et de la pathologie microbienne. Dans cette étude, la recherche de gènes et de structures cellulaires contrôlants les interactions entre une population bactérienne et une surface inerte a été entrepris. Un modèle d’étude, composé de la souche bactérienne Escherichia coli et d'une surface de polystyrène, a été choisi. Un essai mesurant les capacités adhésive d'une bactérie a été développé afin de cribler 7000 mutants de la souche E. Coli K-12 W3110. Un pour-cent des mutants cribles adhéraient moins que la souche parentale. La position précise de la mutation au sein des gènes affectes a été déterminée pour chacun des mutants de l’adhésion. Vingt cinq mutations étaient positionnées dans l'operon fim, impliqué dans la synthèse de fimbriae de type 1. Les résultats obtenus indiquaient un rôle majeur des fimbriae de type 1, et plus particulièrement de l’adhésion spécifique, fimh, dans l’adhésion sur polystyrène. Douze insertions ont été localisées dans des gènes impliqués dans la synthèse du flagellum. La perte d’adhésion observée chez ces mutants était associée à la perte de motilité et a un effet indirect des ces mutations sur la production de fimbriae. Sept mutations ont été localisées dans des gènes impliqués dans la synthèse du noyau lipopolysaccharidique. Dans ce cas, pas d’évidences pour un rôle direct du noyau lipopolysaccharidique dans l’adhésion sur polystyrène ont pu être observées. La perte d’adhésion était associée à la production réduite de fimbriae et aux changements de motilité observés chez ces mutants. Trois mutations ont été localisées dans le gène dsbA. L'effet de ces mutations sur la production de fimbriae était le principal facteur affectant les propriétés adhésives. Le chapitre VI décrit un groupe de cinq mutants de l’adhésion dans lesquels les mutations ont été localisées dans les gènes phnI, yhhT, hisT et abc ainsi que dans une des IS186 d'E. Coli
Joseph, Genora M. D. "Improved dust dispersion modelling for surface quarries : an optimized RANS k − ε approach". Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/33767/.
Повний текст джерелаMilton, Brian E. "Lateral surface superlattices in strained InGaAs layers." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340295.
Повний текст джерелаGénevaux, Pierre Bauda Pascale. "ETUDE GENETIQUE ET PHENOTYPIQUE DE L'ADHESION D'ESCHERICHIA COLI K-12 SUR UNE SURFACE INERTE /." [S.l.] : [s.n.], 1998. ftp://ftp.scd.univ-metz.fr/pub/Theses/1998/Genevaux.Pierre.SMZ9860.pdf.
Повний текст джерелаTanner, Robert E. "The structure of the rutile TiOâ‚‚(110) surface and Ni/TiOâ‚‚ nanoislands." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325929.
Повний текст джерелаHASNAOUI, MOULAY LAHEEN. "Etude par exafs de surface de l'interface si/gaas(110) au seuil k de silicium." Paris 11, 1994. http://www.theses.fr/1994PA112435.
Повний текст джерелаMartini, David M. "Metallization and Modification of Low-k Dielectric Materials." Thesis, University of North Texas, 2008. https://digital.library.unt.edu/ark:/67531/metadc9754/.
Повний текст джерелаCahill, Sarah M. "Variation of surface polysaccharides in the ST25 clonal lineage of Acinetobacter baumannii." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/207776/1/Sarah_Cahill_Thesis.pdf.
Повний текст джерелаCampbell, Gordon R. O. (Gordon Ross Orion) 1969. "Lipopolysaccharide, K antigen, and other components of the bacterial cell surface important for S. meliloti-alfalfa symbiosis." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8581.
Повний текст джерелаIncludes bibliographical references (leaves 139-156).
Sinorhizobium meliloti can form a symbiotic relationship with alfalfa plants in which the bacteria fix atmospheric nitrogen into ammonia for the plant in exchange for nutrients. During this symbiosis, the bacteria live in organs called nodules that develop in the roots of the plant. This thesis explores a range of bacterial components necessary for an effective symbiosis. One overarching theme to these components is that most of them are involved with the bacterial cell surface. Chapter 2 is a study of the lpsB389 mutant, which codes for a predicted glycosyl transferase involved with LPS core synthesis. Bacteria carrying the lpsB389 mutation are capable of carrying out the first steps of nodule invasion on alfalfa plants. However, they display dramatic abnormalities upon entry into plant cells. In Chapter 3, I identified four new classes of mutants involved in K antigen synthesis. Finally, in Chapters 4 and 5, I made use of the newly sequenced S. meliloti genome to determine the locations of the insertions in 43 mutants identified by having an effect on the cell surf ace. Most of these mutants also have symbiotic defects. Chapter 4 examines a series of mutations that affect either LPS or other factors involved in membrane integrity. In contrast to a previous report, I found·that most of these mutants have symbiotic defects. In addition, this study has identified genes coding for proteins not previously recognized as being involved with the integrity of the cell surface or as being required for symbiosis including: GreA, and a protein with a Sua5/Yci0/YrdC family signature domain. Chapter 5 implicates many new genes and processes in symbiosis including: the vitamin B12 , or cobalamin; QxtA, a predicted terminal oxidase of respiration; a predicted magnesium and cobalt transporter; and the process of carbon fixation. Undoubtedly the genes, factors, and metabolic processes identified in these studies will lead to a greater understanding of the complex interaction between S. meliloti and alfalfa during symbiosis. Furthermore, since S. meliloti is closely related to a number of mammaljan and plant pathogens, these discoveries may also contribute to our understanding of how pathogens infect their hosts.
by Gordon R.O. Campbell.
Ph.D.
Shaheed, Rawaa. "3D Numerical Modelling of Secondary Current in Shallow River Bends and Confluences." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34922.
Повний текст джерелаSchlageter, Martin [Verfasser], and Powell A. [Akademischer Betreuer] K. "Click chemistry modification of surface-bound peptides towards applications in printable electronics / Martin Schlageter. Betreuer: A. K. Powell." Karlsruhe : KIT-Bibliothek, 2015. http://d-nb.info/1082294527/34.
Повний текст джерелаKollmannsberger, Sebastian Ludwig [Verfasser], Ulrich K. [Akademischer Betreuer] Heiz, Ulrich K. [Gutachter] Heiz, and Richard W. [Gutachter] Fischer. "Thermal and Photo-Activated Molecular Mechanisms of Surface Processes on TiO2(110) and GaN(0001) / Sebastian Ludwig Kollmannsberger ; Gutachter: Ulrich K. Heiz, Richard W. Fischer ; Betreuer: Ulrich K. Heiz." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/116152889X/34.
Повний текст джерелаSuggs, Allison Elizabeth. "Kr-F laser surface treatment of poly(methyl methacrylate), glycol-modified poly(ethylene terephthalate), and polytetrafluoroethylene for enhanced adhesion of Escherichia Coli K-12." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/35182.
Повний текст джерелаMaster of Science
Vanthanouvong, Viengphet. "Studies of the Elemental Composition of Airway Surface Liquid with Relevance to Cystic Fibrosis." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7245.
Повний текст джерелаRötzer, Marian [Verfasser], Ulrich K. [Akademischer Betreuer] Heiz, Ulrich K. [Gutachter] Heiz, Richard W. [Gutachter] Fischer, and Günther [Gutachter] Rupprechter. "Surface chemistry of unsaturated hydrocarbons on metal based nanoparticles and size-selected clusters under UHV conditions / Marian Rötzer ; Gutachter: Ulrich K. Heiz, Richard W. Fischer, Günther Rupprechter ; Betreuer: Ulrich K. Heiz." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/119081868X/34.
Повний текст джерелаKarlsson, Patrik. "Surface Science Studies of Metal Oxides Formed by Chemical Vapour Deposition on Silicon." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7088.
Повний текст джерелаLahr, David Louis. "Molecular oxygen adsorbates at a Au/Ni(111) surface alloy and their role in catalytic CO oxidation at 70 - 250 K." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36250.
Повний текст джерелаIncludes bibliographical references.
Oxygen is observed to adsorb molecularly on 0.13 - 0.27 ML Au/Ni(1 111) surface alloys at 77 K, in stark contrast to dissociative adsorption on Ni and no adsorption on Au surfaces. Molecular 02 adsorbates on the Au/Ni(111) surface alloy are identified by their 0=0 vibrational modes at 790, 850 and 950 cm-', measured by electron energy loss spectroscopy. Possible Ni adsorption sites for the three types of molecularly adsorbed 02 are proposed. The dramatic change in Ni reactivity occurs within a narrow Au coverage range around 0.13 ML Au and arises from poorer overlap between the Ni d-band and the 02 LUMO as the Ni d-band shifts to lower energy with increasing Au content of the Au/Ni surface alloy. The amount of molecular adsorption as a function of Au coverage cannot be described by an analytical or simulated model based on Au atom proximity to Ni sites, suggesting the role of cooperative effects in 02 stabilization. Adsorbed molecular 02 dissociates between 110 to 150 K. No oxygen desorbs. At Au coverages greater than 0.27 ML, the energy of the Ni d-band is shifted sufficiently low to destabilize oxygen adsorption.
(cont.) Carbon monoxide is catalytically oxidized on the Au/Ni(111) surface alloy at 70 and 77 K via a Langmuir-Hinshelwood mechanism. Molecularly adsorbed 02 is identified as the reactant with adsorbed CO. The reaction probability at 77 K is 0.4. Atomically adsorbed O and CO do not react at 77 or 300 K. Between 108 and 125 K, CO reacts with either atomic O adsorbed on Au atoms or with molecularly adsorbed 02. Between 125-150 K, CO2 production coincides with 02 dissociation, suggesting a "hot atom" mechanism. The reactive potential energy surfaces likely have a late transition state. This work demonstrates that the nanoscale size of Au clusters and its associated quantum size effect are not the necessary feature that enables Au-catalyzed low temperature CO oxidation. Rather, this work strongly suggests that an adsorbed 02 species similarly stabilized at the perimeter of Au nanoparticles is the critical reactant in supported oxide systems.
by David Louis Lahr.
Ph.D.
Čech, Josef. "Příspěvek k realizaci nákladově a energeticky úsporných rodinných domů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-233805.
Повний текст джерелаHoffmann, Max Jakob [Verfasser], Karsten [Akademischer Betreuer] Reuter, and Ulrich K. [Akademischer Betreuer] Heiz. "First-principles Multi-scale Simulations of Dynamic Catalyst Surfaces : CO Oxidation from Palladium Surface Oxide to Palladium Metal / Max Jakob Hoffmann. Gutachter: Karsten Reuter ; Ulrich K. Heiz. Betreuer: Karsten Reuter." München : Universitätsbibliothek der TU München, 2014. http://d-nb.info/1054753016/34.
Повний текст джерелаVan, Heerden Karien. "Geological and anthropogenic impacts on inorganic water quality at rural clinics in the Limpopo Province, South Africa / van Heerden, K." Thesis, North-West University, 2011. http://hdl.handle.net/10394/6978.
Повний текст джерелаThesis (M.Sc. (Geography and Environmental Studies))--North-West University, Potchefstroom Campus, 2011.
Almutairi, Alanoud. "Electronic band structure equations and Fermi surface evolution from 2D materials to 3D layered superconducting compounds." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/134414/1/Alanoud%20Mulfi%20Z_Almutairi_Thesis.pdf.
Повний текст джерелаLie, Fee Li. "Interface Formation Between High Dielectric Permittivity Films and III-V Compound Semiconductors using HF Chemistries and Atomic Layer Deposition." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/204301.
Повний текст джерелаWAHI, TAOUFIK. "Mesure des émissions K, satellites, hypersatellites, deux électrons - un photon des éléments légers : carbone, azote et oxygène lors de l'interaction ions multicharges - surface métallique. Etude à haute résolution des transitions satellites K du néon en excitation électronique." Paris, CNAM, 1996. http://www.theses.fr/1996CNAM0238.
Повний текст джерелаYoldas, Mine. "Predicting The Effect Of Hydrophobicity Surface On Binding Affinity Of Pcp-like Compounds Using Machine Learning Methods." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613215/index.pdf.
Повний текст джерелаKrack, Susannah. "Effect of growth phase and metabolic activity on the surface charge of Escherichia coli K-12 and on its adhesion to quartz and lepidocrocite." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/26947.
Повний текст джерелаFischer, Sybille [Verfasser], Johannes [Akademischer Betreuer] Barth, and Ulrich K. [Akademischer Betreuer] Heiz. "Combined STM and X-ray spectroscopy study of surface-confined biologically relevant molecules / Sybille Fischer. Gutachter: Ulrich K. Heiz ; Johannes Barth. Betreuer: Johannes Barth." München : Universitätsbibliothek der TU München, 2013. http://d-nb.info/1036495043/34.
Повний текст джерелаPfister, Lena [Verfasser], and Christoph K. [Akademischer Betreuer] Thomas. "Improving our Understanding of the Atmospheric Weak-wind Boundary Layer using Spatially Explicit Observations near the Ground Surface / Lena Pfister ; Betreuer: Christoph K. Thomas." Bayreuth : Universität Bayreuth, 2020. http://d-nb.info/1238143474/34.
Повний текст джерелаWu, Dongping. "Novel concepts for advanced CMOS : Materials, process and device architecture." Doctoral thesis, KTH, Microelectronics and Information Technology, IMIT, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3805.
Повний текст джерелаThe continuous and aggressive dimensional miniaturization ofthe conventional complementary-metal-oxide semiconductor (CMOS)architecture has been the main impetus for the vast growth ofIC industry over the past decades. As the CMOS downscalingapproaches the fundamental limits, unconventional materials andnovel device architectures are required in order to guaranteethe ultimate scaling in device dimensions and maintain theperformance gain expected from the scaling. This thesisinvestigates both unconventional materials for the gate stackand the channel and a novel notched-gate device architecture,with the emphasis on the challenging issues in processintegration.
High-κ gate dielectrics will become indispensable forCMOS technology beyond the 65-nm technology node in order toachieve a small equivalent oxide thickness (EOT) whilemaintaining a low gate leakage current. HfO2and Al2O3as well as their mixtures are investigated assubstitutes for the traditionally used SiO2in our MOS transistors. These high-κ filmsare deposited by means of atomic layer deposition (ALD) for anexcellent control of film composition, thickness, uniformityand conformality. Surface treatments prior to ALD are found tohave a crucial influence on the growth of the high-κdielectrics and the performance of the resultant transistors.Alternative gate materials such as TiN and poly-SiGe are alsostudied. The challenging issues encountered in processintegration of the TiN or poly-SiGe with the high-k are furtherelaborated. Transistors with TiN or poly-SiGe/high-k gate stackare successfully fabricated and characterized. Furthermore,proof-of-concept strained-SiGe surface-channel pMOSFETs withALD high-κ dielectrics are demonstrated. The pMOSFETs witha strained SiGe channel exhibit a higher hole mobility than theuniversal hole mobility in Si. A new procedure for extractionof carrier mobility in the presence of a high density ofinterface states found in MOSFETs with high-κ dielectricsis developed.
A notched-gate architecture aiming at reducing the parasiticcapacitance of a MOSFET is studied. The notched gate is usuallyreferred to as a local thickness increase of the gatedielectric at the feet of the gate above the source/drainextensions. Two-dimensional simulations are carried out toinvestigate the influence of the notched gate on the static anddynamic characteristics of MOSFETs. MOSFETs with optimizednotch profile exhibit a substantial enhancement in the dynamiccharacteristics with a negligible effect on the staticcharacteristics. Notched-gate MOSFETs are also experimentallyimplemented with the integration of a high-κ gatedielectric and a poly-SiGe/TiN bi-layer gate electrode.
Key words:CMOS technology, MOSFET, high-κ, gatedielectric, ALD, surface pre-treatment, metal gate, poly-SiGe,strained SiGe, surface-channel, buried-channel, notchedgate.
Maillart, Emmanuel. "IMAGERIE PAR RESONANCE DES PLASMONS DE SURFACE POUR L'ANALYSE SIMULTANEE DE MULTIPLES INTERACTIONS BIOMOLECULAIRES EN TEMPS REEL." Phd thesis, Université Paris Sud - Paris XI, 2004. http://tel.archives-ouvertes.fr/tel-00006480.
Повний текст джерелаThämer, Martin Georg [Verfasser], Ulrich K. [Akademischer Betreuer] Heiz, Michael [Akademischer Betreuer] Moseler, and Reinhard [Akademischer Betreuer] Nießner. "Linear and Nonlinear Surface Spectroscopy of Supported Size Selected Metal Clusters and Organic Adsorbates / Martin Thämer. Gutachter: Michael Moseler ; Reinhard Nießner. Betreuer: Ulrich K. Heiz." München : Universitätsbibliothek der TU München, 2012. http://d-nb.info/1021219215/34.
Повний текст джерелаAraújo, Manoel Silvino Batalha de. "Extensão de GENSMAC para escoamentos de fluidos governados pelos modelos integrais Maxwell e K-BKZ." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-08022007-151417/.
Повний текст джерелаThe aim of this work is to develop a numerical technique for simulating incompressible, isothermal, free surface (also con¯ned) viscoelastic flows of fuids governed by the integral models of Maxwell and K-BKZ (Kaye-Bernstein, Kearsley and Zapas). The numerical technique described herein is an extension of the GENSMAC method (Tome and McKee, J. Comput. Phys., 110, pp. 171-186, 1994) to the solution of the momentuum and mass conservation equations together with the integral constitutive Maxwell and K-BKZ equations. The governing equations are solved by the finite difference method on a staggered grid using a Marker-and-Cell approach. The fluid is represented by marker particles on the fluid surface only. This provides the visualization and location of the fluid free surface so that the free surface stress conditions can be applied. The Finger tensor Bt0(t) is computed using the ideias of the deformation fields method (Peters et al. J. Non-Newtonian Fluid Mech., 89, pp. 209-228, 2001) so that it is not necessary to track a fluid particle in order to calculate its deformation history. However, in this work modifcations to the deformation fields method are introduced: the past time is discretized using a different formula, the Finger tensor Bt0(x; t) is obtained by a second order method and the stress tensor ? (x; t) is computed by a second order quadrature formula. The numerical method presented in this work is validated by simulating the flow of a Maxwell fluid in a two-dimensional channel and the numerical solutions of the velocity and the stress components are compared with the respective analytic solutions providing a good agreement. Further, the flow through a 4:1 planar contraction of a specific fuid studied experimentally by Quinzani et al. (J. Non-Newtonian Fluid Mech., 52, pp. 1-36, 1994) was simulated and the numerical results were compared qualitatively and quantitatively with the experimental results and very good agreement was obtained. The Maxwell and the K-BKZ models were applied to simulate the 4:1 planar contraction problem using various Weissenberg numbers and the numerical results were in agreement with those published in the literature. Finally, numerical results of free surface flows using the Maxwell and K-BKZ integral constitutive equations are presented. In particular, the numerical simulation of jet buckling using several Weissenberg numbers and various Reynolds numbers are presented
Renaudot, Raphaël. "Conception, fabrication de puces microfluidiques à géométrie programmable et reconfigurable reposant sur les principes d’électromouillage sur diélectrique et de diélectrophorèse liquide." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENY080/document.
Повний текст джерелаIn the field of lab-on-a-chip (LOC) systems, the channel geometry of a microfluidic chip is often specific to perform a given protocol. The chip geometry is hence defined at the design step, before the fabrication steps (generally time consuming and expensive) and cannot be thereafter modified. This fact becomes an issue when the geometry does not fit satisfactorily to the specifications and a new batch of fabrication has to be started, to size afresh the microfluidic chip. To overcome this inconvenient we propose to develop a new generation of microfluidic chips with a programmable and reconfigurable geometry. This concept is widely based on both digital microfluidic techniques, the electrowetting on dielectrics (EWOD) and the liquid dielectrophoresis (LDEP) actuations. The first investigation is focused on the microfluidic technique LDEP. First, an electromechanical model for liquids behaviours during a EWOD or LDEP actuation is established. This model is then used as a basis for the LDEP patterns design and fabrication. The LDEP patterns are tested to identify the geometries and dielectric layers stacks which give optimized LDEP actuations. By taking into account a broad parameters range, the study shows that, within a precise setup and specific conditions, the LDEP actuations can have equal performances at the minimum, or better performances than those reported in the overall scientific literature until now. Finally, a surface functionalization protocol by polymer spots (diameter size ranging from a few microns to several dozens of microns) utilizing the LDEP technology is described. This method is likely to compete directly with the standard functionalization tools. The second investigation is dealing with the programmable and reconfigurable geometry concept, thanks to microfluidic platforms which get together both EWOD and LDEP technologies on a same component. Firstly, the microfluidic platform in a single plate configuration allows providing master molds with a programmable geometry for the PDMS microfluidic chip fabrication. The results about this promising study lead to the processing of complex channels geometries, typically used in the microfluidic field. Secondly, the more exciting results are exposed about the programmable and reconfigurable microfluidic concept, by using advantageously the paraffin material. A specific protocol which takes advantages of LDEP and EWOD liquids displacements produces a lot of various and different microfluidic chips with complex channels shapes. For both applications, a single generic microfluidic platform can generate a wide number of different geometries, which can be modified partially or totally thereafter. The obtained results open up novel and promising work prospects, which one of them are approached on the fringe of the initial purposes. The first one belongs to the continuity of the programmable and reconfigurable by suggesting a low cost technology based on flexible Kapton substrate and inkjet printing of silver nanoparticules. The second one investigates the technologies compatibility between MEMS/NEMS resonating structures and LDEP metal structures (in polysilicon) at the submicronic scale
Usman, Muhammad. "Impact of Ionizing Radiation on 4H-SiC Devices." Doctoral thesis, KTH, Integrerade komponenter och kretsar, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-60763.
Повний текст джерелаQC 20120117
Candezano, Miguel Antonio Caro. "Desenvolvimento de esquema upwind para equações de conservação e implementação de modelagens URANS com aplicação em escoamentos incompressíveis." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-18022013-112410/.
Повний текст джерелаIn this thesis, a new high-resolution upwind scheme (named TDPUS-C3) for reconstruction of numerical fluxes for nonlinear conservation laws and related CFD problems in presented. The scheme is based on CBC and TVD stability criteria and developed by employing differentiability condictions (\'C POT. 3\'). In additon, the implementation of an association of the TDPUS-C3 scheme with the RNG \'\\kappa - \\epsilon\' turbulence modelling is also performed. The purpose is to obtain numerical solutions of systems of hyperbolic conservation laws for gas dynamics and Navier-Stokes equations for incompressible flow of Newtonian and non-Newtonian (viscoelstic) fluids. By using the TDPUS-C3 scheme, the global accuracy of the numerical methods is verified by assessing the error on 1D and 2D benchmark test cases. A comparative study between the TDPUS-C3 scheme and convectional upwind schemes to solve standard and complex hyperbolic conservation laws is also accomplished. The association of the numerical modelling (upwinding plus RNG \'\\kappa - epsilon\') is then examined in the simulation of turbulent Newtonian fluid flows involving moving free surfaces, by using URANS methodology. Overall, satisfactory agreement is found in terms of the overall behaviour
Schamm, Sylvie. "Sur l'élaboration des composites SiC/Al par le procédé au K2ZrF6 bases physico-chimiques et incidence sur la résistance des fibres." Phd thesis, Bordeaux 1, 1989. https://tel.archives-ouvertes.fr/tel-00374529.
Повний текст джерелаKaposi, Tobias [Verfasser], Johannes [Akademischer Betreuer] [Gutachter] Barth, and Ulrich K. [Gutachter] Heiz. "A Compact and Versatile Electrospray Ion Beam Deposition Setup : Advanced Sample Preparation for Experiments in Surface Science / Tobias Kaposi ; Gutachter: Ulrich K. Heiz, Johannes Barth ; Betreuer: Johannes Barth." München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1136422641/34.
Повний текст джерелаLiang, Sijia [Verfasser], Roger [Gutachter] Wördenweber, Markus [Gutachter] Grüninger, and Joachim [Gutachter] Hemberger. "Surface Acoustic Waves in Strain-Engineered Thin (K,Na)NbO3 Films: From Basic Research to Application in Molecular Sensing / Sijia Liang ; Gutachter: Roger Wördenweber, Markus Grüninger, Joachim Hemberger." Köln : Universitäts- und Stadtbibliothek Köln, 2021. http://d-nb.info/1229616705/34.
Повний текст джерелаRobertson, Francis. "An experimental investigation of the drag on idealised rigid, emergent vegetation and other obstacles in turbulent free-surface flows." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/an-experimental-investigation-of-the-drag-on-idealised-rigid-emergent-vegetation-and-other-obstacles-in-turbulent-freesurface-flows(07165357-67da-461d-a6a2-ed4970e2cb0c).html.
Повний текст джерелаCoanga, Jean-Maurice. "Caractéristiques vibrationnelles du chlorure de nitryle, du diméthyl-éther et de l'oxyde d'éthylène absorbés sur la surface de la glace ou piégés dans son volume entre 10 et 170 K : Etude de leur photodissociation à 30 K en matrices, phase solide et dans la glace." Paris 6, 2003. http://www.theses.fr/2003PA066062.
Повний текст джерелаCoste, Antoine. "Nanocristaux semi-conducteurs : couplage avec des structures plasmoniques à 4 K et effets collectifs." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLV066/document.
Повний текст джерелаColloidal semiconductor nanocrystals are fluorescent semiconductors with a nanometric size. Bright at room temperature and chemically synthesized, nanocrystals are interesting candidates for differents applications as lighting, biological labeling or photovoltaic.My experimental work, is part of the development of these emitters by two differents approaches : coupling with plasmonic structures at 4,K and formation of collective emission.First, we studied the coupling between single nanocrystals and a flat gold film in order to decrease the optical losses. To begin we studied the influence of the temperature. With some photoluminescence measurements and some simulations, we show significant decrease of the enhancement of the photoluminescence decay rate at 4,K. This reduction is linked to the decrease of optical losses. Then, we studied the influence of crystallinity of gold. We show again an important reduction of enhancement of the photoluminescence decay rate with crystalline gold compared to amorphous layer.Second, we investigated the optical properties of compact nanocrystal clusters encapsulated in a silica shell. At room temperature, we observed an enhancement of the photoluminescence decay rate through Förster resonance energy transfer (FRET). At 4K, we measured an important variation of the emission dynamic with emergence of two times scales. At short time scale, emission is accelerated and governed by the exciton recombination. At long time scale, the decay is governed by power law showing the emergence of long-lived states
AGHLAL-HADDED, MALIKA. "Proprietes physicochimiques du nitrate d'ethylammonium fondu et de ses melanges avec l'eau a 298 k : comportement des electrolytes dilues dans ces milieux." Paris 6, 1988. http://www.theses.fr/1988PA066283.
Повний текст джерелаCattani, Fanny. "Définition d’une collection de minéraux de référence afin de développer et de calibrer une méthode de datation in-situ adaptée à la surface de Mars." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS002/document.
Повний текст джерелаAbsolute age determination is necessary to check and calibrate the relative Martian chronology presently available from meteoritic crater counting. For this purpose, we have developed an in-situ K-Ar dating prototype for planetary surfaces at GEOPS laboratory. This instrument, supported by a CNES-CNRS research program, is a laser ablation-based system built to vaporize a reproducible volume of rock or mineral. It quantifies potassium content (K) by laser-induced breakdown spectroscopy (LIBS) and argon (Ar) by quadrupole mass spectrometry (QMS). The K-Ar age determination also requires accurate quantification of the ablated sample mass. Following an important period of experimental set-up development to improve precision, accuracy and sensitivity of the technique, our efforts focused on the calibration of the different parts of this instrument. To that purpose, a collection of reference samples (micas, feldspars, amphibolite, basalts) was done and analyzed (total chemistry and age measurements by K-Ar and ⁴⁰Ar/³⁹Ar conventional techniques). These samples show a K content between 0,15 and 11% and an Ar content between 1 and 100x10¹⁴ ⁴⁰Ar* atoms per gram, corresponding to Martian basalt from 700 Ma to 3 Ga for 0.4% K. The results obtained evidence a correlation between the ablation time and the ablated mass depending on the mineral phase analyzed. In order to check this correlation, measurements were conducted on several samples, in particular a microlitic basalt (Viluy basalt) similar to Martian basalts. The K-Ar in-situ age of 401 ± 41 Ma obtained by our approach is consistent with the age of 381 ± 5 Ma measured indepedently on mineral populations. More generally, this study allows to obtain K-Ar ages measured by our in-situ dating method with uncertainties lower than 15%, on relatively low-K and young samples compared to Martian rocks
Lamirault, Sylvie. "Comportement du cuivre dans les melanges hf-mf (m = k ou nh : :(4)) fondus utilises pour l'obtention electrolytique du fluor." Paris 6, 1987. http://www.theses.fr/1987PA066467.
Повний текст джерелаBrandi, Analice Costacurta. "Estratégias "upwind" e modelagem k-epsilon para simulação numérica de escoamentos com superfícies livres em altos números de Reynolds." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-01122005-170110/.
Повний текст джерелаThis work is devoted to the analysis and implementation of modern high-order upwind schemes and the standard k-epsilon turbulence model into the Freeflow-2D; a finite difference integrated environment for the numerical simulation of incompressible free surface flow problems. The purpose of this study is the two-dimensional simulation of high-Reynolds incompressible newtonian confined and/or free surface flows. The performance of the current Freeflow-2D code is assessed by applying it to the simulation of flow over a backward facing step and of an impinging free jet onto an impermeable rigid surface. The code is then applied to a turbulent planar jet into a pool. The numerical results are compared with experimental data, analytical solution, and numerical simulations of other works.
Galdámez, Edwin Vladimir Cardoza. "Aplicação das técnicas de planejamento e análise de experimentos na melhoria da qualidade de um processo de fabricação de produtos plásticos." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/18/18140/tde-18112002-090421/.
Повний текст джерелаIndustrial experiments are made by companies in order to improve the quality characteristics of products and production processes. In this sense, the objective of this dissertation is to study and apply the design of experiments in the industrial quality improvement. In addition, as a part of the objective, an application of the techniques of design Fractional Factorial '2POT. K-P', Analysis of Variance and Response Surface Methodology is done. It is focused in an injection molding process applied by a company, that makes and trades plastic products for the civil construction. Using this experimental study, the most important parameters of plastic injection are identified: melt temperature and injection pressure. At the same time, the optimal levels of adjustment of these parameters are determined. From this study, it is evaluated both the implantation procedures of the designs of experiments as well as the difficulties faced. Also, this study tries to contribute to the university-company relationship.
Ahner, Nicole. "Wetting Optimized Solutions for Plasma Etch Residue Removal for Application in Interconnect Systems of Integrated Circuits." Doctoral thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-102773.
Повний текст джерелаIn mehrlagigen Kupfer/low-k basierten Metallisierungssystemen hochintegrierter elektronischer Bauelemente kann die Entfernung von Residuen nach der Plasmastrukturierung des Dielektrikums mittels herkömmlicher Plasmareinigungsprozesse zur Schädigung der Isolatorschicht und damit zum Ansteigen der relativen Dielektrizitätszahl sowie der Leckströme führen. Neben der Entwicklung schädigungsarmer Plasmaprozesse stellt der Ersatz dieser Prozesse durch Nassreinigungsschritte zur Ätzresiduenentfernung eine vielversprechende Alternative dar. Mit stetig abnehmenden Strukturabmaßen ist bei der Entwicklung dieser Nassreinigungsprozesse neben der Materialkompatibilität auch das Benetzungsverhalten der Reinigungsflüssigkeit von entscheidender Bedeutung, da die Oberflächenenergie der Reinigungslösung das Eindringen dieser in kleinste Strukturen verhindern und es durch hohe Kapillarkräfte zum Kollaps von Grabenstrukturen im Dielektrikum kommen kann. In der vorliegenden Arbeit wurde zunächst mittels Kontaktwinkelanalyse die Oberflächenenergie verschieden prozessierter low-k Dielektrikaschichten sowie herkömmlicher Lösungen zur Entfernung von Ätzresiduen untersucht, um hinsichtlich ihres Benetzungsverhaltens besonders kritische Materialkombinationen aufzuzeigen. Neben der Bestimmung des Benetzungsverhaltens hat sich die Kontaktwinkelanalyse zur Oberflächenenergieberechnung als schnelle und empfindliche Methode zur Analyse der Auswirkung von Plasmaprozessen auf die Oberfläche von low-k Dielektrika erwiesen. Die Untersuchungen haben gezeigt, dass besonders polymerisierende Plasmaprozesse eine niederenergetische Oberfläche erzeugen, welche von den derzeit in der Halbleiterfertigung bevorzugten hochenergetischen wasserbasierten Reinigungslösungen nur schlecht benetzt wird. Um diesem Effekt entgegenzuwirken wurde in der vorliegenden Arbeit die Senkung der Oberflächenenergie der Reinigungslösungen durch Zugabe von Tensiden untersucht. Es wurden mehrere Tenside unterschiedlichen Typs den Reinigungsflüssigkeiten zugemischt und die Kompatibilität dieser Lösungen mit low-k Dielektrika, Kupferschichten und Diffusionsbarrieren untersucht sowie ihr dynamisches Verhalten analysiert. Dabei hat sich gezeigt, dass die Auswahl der geeigneten Spüllösung nach dem eigentlichen Reinigungsprozess von entscheidender Bedeutung ist. Optische, elektrische sowie strukturelle Daten deuten darauf hin, dass bei Verwendung einer Spülung mit deionisiertem Wasser in den meisten Fällen Tensidrückstände im porösen Dielektrikum verbleiben. Eine Spülung mit Isopropanol war hingegen in der Lage, einen Großteil dieser Tensidrückstände zu entfernen. Unter Einbeziehung der Daten zur Materialkompatibilität und dem dynamischen Verhalten der Tensidlösungen bei Raumtemperatur und erhöhter Badtemperatur sowie ihrer Langzeitstabilität konnte schließlich eine Prozessempfehlung für die Verwendung der benetzungsoptimierten Reinigungslösungen in der BEOL-Prozessierung gefunden werden
Heckmann, Jan [Verfasser], Ulrike [Akademischer Betreuer] Woggon, Ulrike [Gutachter] Woggon, Kurt [Gutachter] Busch, and Vasily [Gutachter] Temnov. "Investigations of nonlinear surface-wave phenomena and anisotropic photoluminescence of nano-film structures via two-dimensional k-space spectroscopy / Jan Heckmann ; Gutachter: Ulrike Woggon, Kurt Busch, Vasily Temnov ; Betreuer: Ulrike Woggon." Berlin : Technische Universität Berlin, 2017. http://d-nb.info/1156014247/34.
Повний текст джерелаDing, Li. "Optical Anisotropy and Molecular Orientation of CuPc Films and Optical Properties of Ultra-thin High-k Films." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-97100.
Повний текст джерелаIn dieser Arbeit werden dünne Schichten aus Kupferphthalozyanin (CuPc) mittels spektroskopischer (in-situ) Ellipsometrie (SE) und (in-situ) Reflektions-Anisotropie-Spektroskopie (RAS) untersucht, um die optische Anisotropie in einer Ebene parallel und senkrecht zur Schichtoberfläche und die molekulare Orientierung zu bestimmen. CuPc ist ein aussichtsreicher Kandidat als organischer Halbleiter in organischen Feldeffekt-Transistoren, organischen Leuchtdioden und organischen Solarzellen. Vizinale Si(111)-Substrate sind wegen der Anisotropie in der Substratebene interessant, die durch die Treppen und Terrassen auf der Oberfläche verursacht wird. Die Stärke der Anisotropie der vizinalen Si(111)-Oberfläche ist vom Schnittwinkel (Offcut) abhängig. Es wird der Einfluss des Offcut-Winkels auf die molekulare Orientierung in dünnen CuPc-Schichten parallel und senkrecht zur Substratoberfläche untersucht. Die in-situ Untersuchungen von CuPc-Schichten weisen darauf hin, dass strukturelle Veränderungen beim Wachstum auftreten. Darüber hinaus wurden zwei unterschiedliche Oberflächenmodifizierungsschichten, um deren Wirkung auf die molekulare Orientierung von CuPc zu untersuchen, verwendet: eine OTS-Monoschicht mit aufrecht stehenden Molekülen und PTCDA-Schichten mit flach liegenden Molekülen. Metall-organische Grenzflächen spielen eine wichtige Rolle in organischen elektronischen Bauelementen. In-CuPc wird als Beispiel für ein Metall-organisches System durch in-situ SE und RAS untersucht. Wenn In thermisch auf eine CuPc-Schicht aufgedampft wird, diffundieren In-Atome zunächst in die darunterliegende CuPc-Schicht und bilden dann Cluster auf der Schicht. Hafniumdioxid (HfO2) ist ein heißer Kandidat für das Ersetzen des herkömmlich als Gate-Dielektrikum verwendeten SiO2 mit dem Ziel, die Leckströme bei der weiteren Verkleinerung mikroelektronischer Bauelemente zu minimieren. Um amorphe Schichten, die vorteilhaft zur Minimierung der Leckströme sind, zu erhalten, werden die HfO2-Schichten, die oft kristallin sind, mit Aluminiumoxid (Al2O3) (k-Wert: 9) kombiniert, das bei wesentlich höheren Temperaturen amorph bleibt. Zwei Serien von ultra-dünnen Proben wurden durch Atomlagenabscheidung hergestellt: Mischschichten HfxAl1-xOz und Doppelschichten HfO2 auf Al2O3. Die optischen Konstanten und Bandlücken wurden mittels SE im Energiebereich von 0,7 bis 10 eV bestimmt. Es hat sich gezeigt, dass die (effektive) Bandlücke der Misch- und Doppelschichten durch die Komposition abgestimmt werden kann. Nach Lagerung der High-k-Schichten für zwei Monate an Luft konnte ein Alterungseffekt beobachtet werden. Dieser wird auf die weitere Oxidation der dielektrischen Schichten, die durch Sauerstoffdiffusion aus der Umgebungsluft in die High-k-Schichten ermöglicht wird, zurückgeführt