Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"Multilayer structure"”.
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Characterization of Linear Electro-Optic Effect of Poled Organic Thin Films
… of poled organic thin films based on a multilayer structure containing a transparent conducting oxide (TCO) layer. The linear EO properties are often characterized using the Teng-Man reflection method. However, it has been reported that experimental error can result from ignoring …
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PULSED THz GENERATION BASED ON PHOTOCONDUCTIVE ANTENNA FOR THz TIME-DOMAIN SPECTROSCOPY
… PCA is fabricated based on the InGaAs and InAlAs multilayer structure. The THz signal is measured using the time-domain spectroscopy system. Both the photocurrent and current change are the key determinants of THz amplitude. At least a two-fold increase in the resistance is required for THz …
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The effect of nanoclays on the properties of aspirin modified enteric polymer prepared by hot-melt mixing
… of HT in the nanocomposites, originally a multilayer structure, is significantly changed with increasing ASP loading. ASP shows affinity to the Al and Mg ions of the HT layers, resulting in a change of the HT morphology in the composites. The polymer chain of Eudragit L100-55 is also …
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Ultrafast laser driven spin generation in metallic ferromagnets
… spin accumulation in a NM/FM1/NM structure and spin transfer torque in a NM/FM1/NM/FM2 structure. The SDSE-driven spin generation is due to a heat current at FM/NM interfaces and spin-dependent Seebeck coefficient of FM. Ultrafast laser light deposits its energy in a heat absorbing …
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Nanocrystalline Fe-Pt alloys: phase transformations, structure and magnetism
… on the alloy composition and initial microstructure (homogeneous A1 phase or multilayer-type) is established. Through the use of mechanical alloying and subsequent heat treatment it has been possible to achieve the formation of chemically highly ordered L10 FePt and, in the case of the …
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Membrane technology for the fabrication of three-dimensional photonic crystals
… currently limit the ability to create the multilayer structure of dielectric materials. Past investigators have approached the problem using the layer-by-layer fabrication method; this method leverages the planar processes that have been developed by the semiconductor industry. Ultimately, …
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The effects of temperature and carbon nanotubes on conducting polymer actuator performance
… attempted fabrication techniques, drop-casted multilayer structure demonstrated that increasing the amount of fCNTs reduced creep rate, but also decreased active strain, stiffness, and conductivity. Applying higher preload (up to 3 MPa) improved active strain in the composites by providing more …
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Green function studies of the interlayer exchange coupling in magnetic multilayers
… Interlayer Exchange Coupling (IEC) of magnetic multilayers has been one of the most studied problems in condensed matter physics for the last decade. It is found that for a multilayer structure in which magnetic layers are separated by a spacer, the magnetic moments of each layer orient …
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Modelling and simulation of drying process for ceramic membrane fabrication
For ages, ceramic properties and structure is known for its brittleness and its failure such as cracking and warping. This weakness also relates to the high sensitivity of ceramic to any thermal gradient effects. Therefore, processing steps of green body of ceramic is crucial especially in membrane …
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Static and ultrafast optical properties of nanolayered composites : gold nanoparticles embedded in polyelectrolytes
… of this thesis gold nanoparticle/polyelectrolyte multilayer structures were prepared, characterized, and investigated according to their static and ultrafast optical properties. Using the dip-coating or spin-coating layer-by-layer deposition method, gold-nanoparticle layers were embedded in a …
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Optimization Of A Non-Contact Single Phase Drive Ultrasonic Micromotor: Via Design And Analysis Of Engineered Stator Curvature And Surface Acoustic Streaming Actuators
… and the rotor. The analytical analysis of the multilayer structure matched well with the measured curvature information. The motor is designed to be tested under optical interferometer at different operating temperatures. Temperature dependence of the curvature demonstrates that temperature can …
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Channel modeling of multilayer diffusion-based molecular nano communication system
… systems, investigation on DBMC system through a multilayer channel has received less attention. The aims of this research are to mathematically model a closed-form expression of mean molecular concentration over multilayer DBMC channel, to formulate channel characteristics, and to conduct …
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Estimating The Thermal Properties Of Thin Film And Multilayer Structures Using Photothermal Deflection Spectroscopy
… for the calculation of the thermal field in a multilayer structure resulting from periodic laser heating. The model incorporates the effects of anisotropic thermal conductivity, interlayer thermal contact resistance, and volumetric optical-to-thermal energy conversion. temperature field is used …
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Adsorption of Model Fuel Additives at the Metal/Oil Interface
… adsorption showed evidence for a liquid phase multilayer structure on the iron oxide surface. The complexity of both additive and solvent was increased through adsorption studies of a multi-functional phenol and amine surfactant (PH-01) in various mixtures of a four component model gasoline. …
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Designing High Performing Durable Bio-Based Coatings for Packaging Applications
… Chapter 2 presents a fully biodegradable multilayer structure composed of a cellulose nanocrystal–chitin nanofiber (CNC–ChNF) coating on paper laminated with poly(hydroxyalkanoates) (PHA). The design leveraged the oxygen barrier of CNC–ChNF, the mechanical support of paper, and the …
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The formation and characterisation of micro- and nanostructured surfaces through combinations of top-down and bottom-up fabrication methodologies
… and explores how they can be incorporated into a multilayer structure on a surface. This multilayer assembly is achieved by the layer-by-layer deposition methodology in conjunction with a charged polyelectrolyte. The layer-by-layer deposition process is followed with three different …
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Investigation of the Structure of Alkyne Self-Assembled Monolayers on Gold and the Development of Matrix-Enhanced Secondary Ion Mass Spectrometry Methods
… layer is highly disordered, oxidized and has a multilayer structure. Longer chain length TAMs form disordered monolayers on gold. As the methylene chain length increases, the conformational order of the TAMs increases with the alkynes in an upright conformation and bound to the surface via a …
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Uniform-electric-field-approximation based modelling of longitudinal piezoelectric transducers
… layers. For the calculations and analysis of a multilayer structure, a transfer matrix method is always used. Therefore, to further facilitate the calculation when LPT are joined with other layers, the simplified fundamentals of LPT in Paper 1 is wrapped into a transfer matrix form as detailed …
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MULTILAYER COMPOSITE SOLID ELECTROLYTES FOR LITHIUM ION BATTERIES
… a novel SE was developed by forming a multilayer structure. The multilayer SE was fabricated using polymeric and ceramic electrolytes, which can integrate the merits from different layers and materials and optimize its overall performance. </p> <p>In order to choose an ideal ceramic …
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Photo-crosslinked Surface Attached Thin Hydrogel Layers
… Later part of project involved synthesis of multilayer hydrogel assembly involving a thermoresponsive polymer and a hydrophilic polymer. The combination of two layers with photo-crosslinkable DMAAm polymer as base layer and photo-crosslinkable NIPAAm polymer as top layer formulate a …
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