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Aude, Diana Prado Lopes. "Modeling superconductors using surface impedance techniques". Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61254.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (p. 53-54).
This thesis develops a simulation tool that can be used in conjunction with commercially available electromagnetic simulators to model the behavior of superconductors over a wide range of frequencies. This simulation method can be applied to metals both in the normal and superconducting state and is based on calculating surface impedance as a function of temperature, frequency and material parameters (such as the coherence length and the normal state conductivity). The surface impedance calculations apply the Mattis Bardeen and Zimmermann formulations of conductivity for superconductors to classical transmission line theory. When the tool is used with the Zimmermann formulation, it can model the behavior of superconductors with arbitrary purity, including very clean superconductors, which cannot be handled correctly by the Mattis Bardeen conductivity approach used in current simulators such as SuperMix [1]. Simulations were performed using the developed tool with Ansoft's HFSS EM simulator. The results for a copper printed circuit board resonator showed very good agreement with measured data, attesting to the soundness of the transmission line theory used to develop this tool. A microfabricated niobium coplanar waveguide resonator - for use in quantum computing applications - was also modeled and simulations gave the expected results for the electric field distributions and the variation of Q with temperature and capacitive coupling. The tool developed here can therefore be used to predict the electromagnetic behavior of a superconducting device as function of the material parameters, operating temperature and frequency. With measurements of the device's Q at a recorded frequency and temperature, this tool can also be used to determine the mean free path of the material (assuming other material parameters such as coherence length, transition temperature (Tc) and the ratio of the energy gap to kBTc are known). Equivalently, if all material parameters are known, comparison of Q measurements with simulation results can be used to determine the operating temperature, which may otherwise be difficult to measure in cryogenic environments.
by Diana Prado Lopes Aude.
S.B.
Porch, Adrian. "Microwave surface impedance of YBa₂Cu₃O₇". Thesis, University of Cambridge, 1992. https://www.repository.cam.ac.uk/handle/1810/283677.
Pełny tekst źródłaSyropoulou, Stella. "AC Impedance Testing of Surface Treatments on Concrete". Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511869.
Pełny tekst źródłaXiao, Binping. "Surface Impedance of Superconducting Radio Frequency (SRF) Materials". W&M ScholarWorks, 2012. https://scholarworks.wm.edu/etd/1539623605.
Pełny tekst źródłaMotta, Marcelo Jorge de Assis. "Equivalent impedance of rough surface at low grazing angles". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA369420.
Pełny tekst źródła"September 1999". Thesis advisor(s): R. Janaswamy. Includes bibliographical references (p. 77). Also avaliable online.
Chen, Quan, i 陳全. "Efficient numerical modeling of random surface roughness for interconnect internal impedance extraction". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B3955708X.
Pełny tekst źródłaTonkin, Bryan Anthony. "Microwave properties of bulk and thick film YBaâ†2Cuâ†3Oâ†7â†-â†x superconductors". Thesis, University of Portsmouth, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282543.
Pełny tekst źródłaAbu, Bakar Mizarina. "Microwave properties of high temperature superconducting thin films". Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289384.
Pełny tekst źródłaMorgan, Benjamin. "Microwave surface impedance of YBa₂Cu₃O₆.₉₅ in the mixed state". Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615118.
Pełny tekst źródłaBaumeister, Carl Robert. "Electrochemical impedance spectroscopy and surface plasmon resonance for diagnostic antibody detection". Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/31495.
Pełny tekst źródłaDissertation (MSc)--University of Pretoria, 2012.
Biochemistry
MSc
Unrestricted
Delaunay, Guy. "Modelisation d'objets de revolution multicouches par impedance de surface. Application au calcul de surface equivalente radar". Paris 11, 1990. http://www.theses.fr/1990PA112269.
Pełny tekst źródłaCepek, Tomáš. "Planární anténa na EBG substrátu". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-221013.
Pełny tekst źródłaChen, Quan. "Efficient numerical modeling of random surface roughness for interconnect internal impedance extraction". Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B3955708X.
Pełny tekst źródłaBashir, Shahid. "Design and synthesis of non uniform high impedance surface based wearable antennas". Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/5919.
Pełny tekst źródłaDai, Chenyun. "Studies of the relationship between the surface electromyogram, joint torque and impedance". Digital WPI, 2016. https://digitalcommons.wpi.edu/etd-dissertations/433.
Pełny tekst źródłaCure, David. "Reconfigurable Low Profile Antennas Using Tunable High Impedance Surfaces". Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4659.
Pełny tekst źródłaWang, Junfeng 1971. "A new surface integral formation of EMQS impedance extraction for 3-D structures". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80210.
Pełny tekst źródłaRemillard, Stephen Keith. "The effects of granularity on the microwave surface impedance of high kappa superconductors". W&M ScholarWorks, 1993. https://scholarworks.wm.edu/etd/1539623844.
Pełny tekst źródłaDe, Cliff Steve V. "Electrochemical Quartz Crystal Microbalance and Impedance Analysis investigations of surface processes at platinum electrodes". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq20996.pdf.
Pełny tekst źródłaHusain, Adel Abdulmajeed. "Paint coated steel in Kuwaiti corrosion environment : surface corrosion mapping & electrochemical impedance spectroscopy". Thesis, Imperial College London, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336601.
Pełny tekst źródłaWen, Xuejin. "Design, Fabrication, and Characterization of Field-Effect and Impedance Based Biosensors". The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1308312352.
Pełny tekst źródłaKearns, James A. "An investigation of the diffraction of an acoustic plane wave by a curved surface of finite impedance". Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/16749.
Pełny tekst źródłaMartin, James Stephen. "An experimental study of the scattered near field of submerged objects with surface impedance discontinuities". Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/16095.
Pełny tekst źródłaHu, Xin 1979. "The use of conduction mode basis functions in surface integral formulation for wideband impedance extraction". Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/87356.
Pełny tekst źródłaMa, Mingxian. "A Feasibility Study of Particle Sorter Using Impedance Detection and Traveling Surface Acoustic Wave Sorting". University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1436206839.
Pełny tekst źródłaYOSHIKAWA, DANIEL S. "Efeito de tratamentos de modificação da superfície na resistência à corrosão do alumínio 1050". reponame:Repositório Institucional do IPEN, 2011. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9970.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
Pires, Carneiro Leonardo [Verfasser]. "Development of an Electrochemical Biosensor Platform and a Suitable Low-Impedance Surface Modification Strategy / Leonardo Pires Carneiro". Karlsruhe : KIT Scientific Publishing, 2014. http://www.ksp.kit.edu.
Pełny tekst źródłaZhu, Yu. "Modélisation de structures à haute impédance". Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00621152/en/.
Pełny tekst źródłaMogensen, Gavin. "Instrumentation for Impedance Measurements in the ELF/VLF Band for Geophysical Investigations". Thesis, Griffith University, 2015. http://hdl.handle.net/10072/367343.
Pełny tekst źródłaThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Griffith School of Engineering
Science, Environment, Engineering and Technology
Full Text
Park, Young-Jin [Verfasser]. "Applications of photonic bandgap structures with arbitrary surface impedance to Luneburg lenses for automotive radar / Young-Jin Park". Karlsruhe : IHE, 2002. http://d-nb.info/1005498512/34.
Pełny tekst źródłaLi, Qin. "The study of DNA dynamics at carbon electrode surface toward DNA sensors by fluorescence and electrochemical impedance spectroscopy". Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/9159.
Pełny tekst źródłaDepartment of Chemistry
Jun Li
This study is focused on exploring the mechanisms of DNA dynamics at carbon electrode surfaces under a strong electric field for the development of novel DNA hybridization sensors. Oligonucleotides with FAM6 attached at the distal end are covalently tethered on the carbon electrode surface. The fluorescence emission from the FAM6 is strongly quenched in close proximity to the electrode surface. The modulation to the fluorescence intensity is correlated with the reversible reorientation of the negatively charged DNA molecules under the electric field within the electric double layer. The orientation dynamics are apparently determined by the interplay of the electropotential, salt concentration, and stiffness of the DNA molecules. We have observed that dsDNAs switch with fast dynamics (in < 0.05 second) followed by relaxation at a slower rate (in > 0.1 second) when the electric field is altered by stepping the electropotential to a more positive or negative value. The DNA reorientation exhibits strong dependence on the PBS buffer concentration and electric double layer thickness. A preliminary calculation based on dipole-surface energy transfer theory indicates that the critical distance between FAM6 and glassy carbon surface is 10.95 nm. In connection with the fluorescence study, the effect of DNA hybridization on electrochemical impedance spectroscopy (EIS) has also been investigated by two methods in an attempt to develop a fast electronic detection method. First, EIS at high AC amplitude (141 mV rms) with DNA-modified glassy carbon electrodes before and after target DNA hybridization have shown notable change at high frequencies, likely related to the DNA reorientation processes. Second, reversible EIS detection of DNA hybridization has been demonstrated with patterned regular carbon nanofiber arrays at normal AC amplitude (10 mV rms). The combination of these two methods will be explored in future studies. The effects of the electric field on surface-tethered molecular beacons (MBs) have also been studied with fluorescence spectroscopy. An increase in fluorescence at negative bias is observed accompanying the opening of the MB stem, which leads to larger separation between fluorophore and quencher. At positive bias, the rehybridization of the MB stem leads to a decrease in fluorescence intensity.
Tokgöz, Cağatay. "Asymptotic high frequency analysis of the surface fields of a source excited circular cylinder with an impedance boundary condition /". The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486402544591534.
Pełny tekst źródłaWilson, Glenn Andrew, i glenn wilson@griffith edu au. "Plane Wave Propagation Problems in Electrically Anisotropic and Inhomogeneous Media with Geophysical Applications". Griffith University. School of Microelectronic Engineering, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030325.210206.
Pełny tekst źródłaWilson, Glenn Andrew. "Plane Wave Propagation Problems in Electrically Anisotropic and Inhomogeneous Media with Geophysical Applications". Thesis, Griffith University, 2003. http://hdl.handle.net/10072/365776.
Pełny tekst źródłaThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Microelectronic Engineering
Full Text
Sjödin, Mattias. "Investigating Particle Cracking in Single- and Polycrystalline Nickel-Rich Cathodes using In Situ Impedance Spectroscopy". Thesis, Uppsala universitet, Strukturkemi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-449968.
Pełny tekst źródłaMelais, Sergio E. "A quasi Yagi antenna with end fire radiation over a metal ground". [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003246.
Pełny tekst źródłaSAVINO, UMBERTO. "Physical properties of metal-oxide surfaces for CO2 valorisation". Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2823956.
Pełny tekst źródłaForslund, Ola. "Scattering and propagation of electromagnetic waves in planar and curved periodic structures - applications to plane wave filters, plane wave absorbers and impedance surfaces". Doctoral thesis, KTH, Alfvén Laboratory, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3825.
Pełny tekst źródłaThe subject of this thesis is scattering of electromagneticwaves from planar and curved periodic structures. The problemspresented are solved in the frequency domain.
Scattering from planar structures with two-dimensionalperiodic dependence of constitutive parameters is treated. Theconstitutive parameters are assumed to vary continuously orstepwise in a cross section of a periodically repeating cell.The variation along a longitudinal coordinate z is arbitrary. Ageneral skew lattice is assumed. In the numerical examples, lowloss and high loss dielectric materials are considered. Theproblem is solved by expanding the .elds and constitutiveparameters in quasi-periodic and periodic functionsrespectively, which are inserted into Maxwells equations.Through various inner products de.ned with respect to the cell,and elimination of the longitudinal vector components, a linearsystem of ordinary di.erential equations for the transversecomponents of the .elds is obtained. After introducing apropagator, which maps the .elds from one transverse plane toanother, the system is solved by backward integration.Conventional thin metallic FSS screens of patch or aperturetype are included by obtaining generalised transmission andre.ection matrices for these surfaces. The transmission andre.ection matrices are obtained by solving spectral domainintegral equations. Comparisons of the obtained results aremade with experimental results (in one particular case), andwith results obtained using a computer code based on afundamentally di.erent time domain approach.
Scattering from thin singly curved structures consisting ofdielectric materials periodic in one dimension is alsoconsidered. Both the thickness and the period are assumed to besmall. The .elds are expanded in an asymptotic power series inthe thickness of the structure, and a scaled wave equation issolved. A propagator mapping the tangential .elds from one sideto the other of the structure is derived. An impedance boundarycondition for the structure coated on a perfect electricconductor is obtained.
Keywords:electromagnetic scattering, periodicstructure, frequency selective structure, frequency selectivesurface, grating, coupled wave analysis, electromagneticbandgap, photonic bandgap, asymptotic boundary condition,impedance boundary condition, spectral domain method,homogenisation
CAPPELLO, BARBARA. "Analysis and Reduction of the Scattering by Cloaked Metallic Cylinders Beyond the Quasi-static Limit". Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2915197.
Pełny tekst źródłaUlrich, Christian. "Electric Fields for Surface Design and Chemical Analysis". Doctoral thesis, Linköpings universitet, Tillämpad Fysik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-12485.
Pełny tekst źródłaYang, Yaqin. "Surface treated cp-titanium for biomedical applications : a combined corrosion, tribocorrosion and biological approach". Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2014. http://www.theses.fr/2014ECAP0050/document.
Pełny tekst źródłaTribocorrosion is defined as the study of the interplay between chemical, electrochemical and mechanical processes that leads to a degradation of passivating materials in a corrosive environment. Due to the low density, excellent mechanical properties, high corrosion resistance and good biocompatibility, titanium and its alloys are widely used as dental and orthopedic implants. However, the poor wear resistant and bio-Inert properties limit their further development as more efficient and economic biomedical implants. To improve the corrosion-Wear resistance and even bioactivity of metallic implants, different surface modification methods are imposed in the past decades.The aim of this work is to provide a deep insight in the area of corrosion and tribocorrosion behavior of commercially pure titanium (cp Ti) under the guidance of a tribocorrosion protocol for passivating materials. And then three different surface modification treatments, as:- one-Step thermal oxidation at 650 °C for 48 h in air atmosphere to form a titania (TiO2) film on the surface of cp Ti.- one-Step electrochemical deposition of calcium phosphate (CaP) bioactive film on the surface of cp Ti.- electrochemical deposition of CaP bioactive film followed by thermal oxidation at 650 °C for 6 h in air atmosphere to form a CaP/TiO2 bioceramic film on cp Ti surface.The crystalline phases of the modified films were identified by X-Ray diffraction (XRD). Scanning electron microscopy (SEM) combined with energy dispersive spectroscopy (EDS) was used to characterize the morphology and composition of these films on cp Ti surface. In situ electrochemical measurements, like open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization are used to characterize the corrosion behavior of cp Ti samples without or with surface modification. The tribocorrosion behavior was investigated in an aqueous environment by combining a pin-On-Disc tribometer with the in situ electrochemical equipment. The classical tribological parameters could be also recorded under mechanical loaded condition. Surface characterization and analysis (like chemical composition, morphology, roughness...) are carried out before and after each corrosion and tribocorrosion test. A protocol for the culture of cells on the surface of titanium was validated, basing on the preliminary experimental results
Sanders, Wesley Crowell. "Examining the Effects of Applied Potential on the Surface Charge of Functionalized Monolayers for Site-Directed Ionic Self Assembly". Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/29523.
Pełny tekst źródłaPh. D.
Saleh, Gameel [Verfasser], Klaus [Akademischer Betreuer] Solbach i Daniel [Akademischer Betreuer] Erni. "High Impedance Surface – Electromagnetic Band Gap (HIS-EBG) Structures for Magnetic Resonance Imaging (MRI) Applications / Gameel Saleh. Gutachter: Daniel Erni. Betreuer: Klaus Solbach". Duisburg, 2013. http://d-nb.info/104601157X/34.
Pełny tekst źródłaAZZOUZ, FOUAD. "Contribution a la modelisation de toles ferromagnetiques par impedance de surface et elements finis application au calcul des puissances du chauffage par induction". Nantes, 2000. http://www.theses.fr/2000NANT2107.
Pełny tekst źródłaLeonardi, Ornella. "Circularly polarized antennas". Doctoral thesis, Università di Catania, 2014. http://hdl.handle.net/10761/1496.
Pełny tekst źródłaCleveland, Jerika Dawn. "The Design and Analysis of a Microstrip Line Which Utilizes Capacitive Gaps and Magnetic Responsive Particles to Vary the Reactance of the Surface Impedance". Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31552.
Pełny tekst źródłaSZURKALO, MARGARIDA. "Investigacao do efeito de moleculas auto-organizaveis na resistencia a corrosao da liga de aluminio 1050". reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9488.
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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
Nilebäck, Erik. "A novel biotinylated surface designed for QCM-D applications". Thesis, Linköping University, Department of Physics, Chemistry and Biology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19250.
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Control of protein immobilization at sensor surfaces is of great interest within various scientific fields, since it enables studies of specific biomolecular interactions. To achieve this, one must be able to immobilize proteins with retained native structure, while minimizing non-specific protein binding. The high affinity interaction between streptavidin (SA) and biotin is extensively used as a linker between a surface, where SA is immobilized, and the (biotinylated) molecule of interest. Self- assembled monolayers (SAMs) of poly- and oligo ethylene glycol (PEG and OEG) derivatives have been proven in literature to minimize non-specific protein binding, and biotin-exposing SAMs have been shown efficient for immobilization of SA.
The aim of this master's thesis project was to develop biotinylated gold surfaces for quartz crystal microbalance with dissipation monitoring (QCM-D) applications through the self-assembly of mixed monolayers of thiolated OEG (or PEG) derivatives with or without a terminal biotin head group. For this, different thiol compounds were to be compared and evaluated. For the systems under study, the required biotin density for maximum specific SA immobilization was to be established, while keeping the non-specific serum adsorption at a minimum. Model experiments with biotinylated proteins immobilized to the SA-functionalized surfaces were to be performed to evaluate the possibilities for commercialization.
A protocol for the preparation of a novel biotinylated surface was developed based on the immersion of gold substrates in an ethanolic incubation solution of dithiols with OEG chains (SS-OEG and SS-OEG-biotin, 99:1) and found to give reproducible results with respect to low non-specific protein binding and immobilization of a monolayer of SA. The modified surfaces allowed for subsequent immobilization of biotinylated bovine serum albumin (bBSA) and biotinylated plasminogen (bPLG). PLG was the subject of a challenging case study, using a combination of QCM-D and surface plasmon resonance (SPR), where the immobilized protein was subjected to low molecular weight ligands that were believed to induce conformational changes. The high control of the surface chemistry allowed for the interpretation of the increased dissipation shift upon ligand binding in terms of conformational changes.
An obstacle before commercialization of the described biotinylated surfaces is that they do not seem stable for storage > 7 days. The reasons for this have to be investigated further.
Volpati, Diogo [UNESP]. "Fabricação e caracterização de filmes finos de perileno: arquitetura molecular e aplicações sensoriais". Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/94501.
Pełny tekst źródłaFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Filmes finos do bis benzimidazo perileno (AzoPTCD) foram fabricados usando as técnicas de Langmuir, Langmuir-Blodgett (LB) e evaporação a vácuo (PVD). A estabilidade térmica durante a fabricação dos filmes PVD ('DA ORDEM DE' '400 GRAUS' a '10 POT. -6' Torr) e a integridade da estrutura molecular pela dissolução do AzoPTCD em ácidos fortes para a fabricação dos filmes de Langmuir e LB foram monitoradas pelo espalhamento Raman. Complementarmente a análise termogravimétrica revelou que a degradação térmica do AzoPTCD ocorre a '675 GRAUS'. Os filmes de Langmuir revelaram um alto empacotamento molecular do AzoPTCD sobre a subfase aquosa, onde as moléculas estão apoiadas sobre seu eixo maior ou menor. A adição de íons metálicos na subface aquosa revelou uma sensibilidade do AzoPTCD a presença destes íons, deslocando as isotermas para maiores valores de área molecular média. O crescimento dos filmes LB e PVD sobre substratos sólidos foi monitorado através da espectroscopia de absorção UV-Vis, e a morfologia dos filmes PVD foi estudada via microscopia de força atômica (AFM) em função da espessura em massa. A organização molecular dos filmes PVD foi determinada usando as regras de seleção de superfície aplicadas na espectroscopia de absorção no infravermelho (modos de transmissão e reflexão). Apesar da organização molecular, a difração de raios-x revelou que os filmes PVD são amorfos. Cálculos teóricos (Density functional theory -B3LYP) foram usados para atribuição dos modos vibracionais nos espectros de absorção no infravermelho e espalhamento Raman ressoante Nanoestruturas metálicas, capazes de ativar os fenômenos de amplificação em superfície foram usadas para estudos de espalhamento Raman ressonante amplificado em superfície (SERRS) e fluorescência amplificada em superfície (SEF) nos filmes LB e PVD. Através...
Thin solid films of bis benzimidazo perylene (AzoPTCD) were fabricated using Langmuir, Langmuir-Blodgett (LB) and physical vapor deposition (PVD) techniques. Thermal stability during the fabrication of PVD films ('DA ORDEM DE' '400 GRAUS' a '10 POT. -6' Torr) and chemical structure integrity by dissolution of the AzoPTCD in a strong acid were monitored by Raman scattering. Complementary thermogravimetric results showed that thermal degradation of AzoPTCD occurs at '675 GRAUS'. Langmuir films showed a high molecular packing with the molecules tilted onto the aqueous subphase. Besides, the AzoPTCD л-A isotherms were shifted to larger areas due to the addition of metallic ions in the subphase. The growth of the LB and PVD films were established through UV-Vis absorption spectroscopy, and the surface morphology in PVD films was probed by atomic force microscopy (AFM) as function of the mass thickness. The AzoPTCD molecular organization in the PVD films was determined using the selection rules of infrared absorption spectroscopy (transmission and reflection-absorption modes). Despite the molecular organization, X-ray diffraction revealed that the PVD films are amorphous. Theoretical calculations (Density Functional Theory, B3LYP) were used to assign the vibrational modes in the infrared and Raman spectra. Metallic nanostructures, able to sustain localized surface plasmons (LSP) were used to achieve surface-enhanced resonance Raman scattering (SERRS) and surface-enhanced fluirescence (SEF) in the LB and PVD films. The conductivity and rectifier character of the PVD films of AzoPTCD were determined by current as function of tension curves (I(V)) in dc measurements. The impedance spectroscopy in ac measurements was used to study the performance of PVD films of the AzoPTCD as transductor elements in sensing units applied to discriminate... (Complete abstract click electronic access below)
Dorosh, Anastasiia. "Design of Microstrip Microwave Devices with Lumped Elements by Means of Modern CADs". Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-30365.
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