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 16 of 16 for “"interfacial layers"”.
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Trace Gas-Induced Brine and Disordered Interfacial Layers on Ice
Brine and disordered interfacial layers (DILs) on ice are known to significantly alter the interaction between trace gases and ice surfaces. In order to better predict the impact of a warming climate on atmospheric composition, a quantitative physical understanding of the interaction between ice …
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Instability-induced transformation of interfacial layers in composites and its multifunctional applications
… in the microstructure of composites with thin interfacial layers. The hybrid microstructure of a composite material has an essential influence on the effective properties and behavior of the composite. Hence, in this research, the principles and mechanics of interfacial layer instabilities are …
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Design, fabrication, and characterization of germanium MOSFETs with high-k gate dielectric stacks based on the nitride interfacial layers
… poor physical and electrical properties so an interfacial layer is required. Proposed interlayers include GeON, Si, and metal nitrides such as AIN and Hf3N4. This work focuses on the fabrication and characterization of germanium MOSFETs with GeON, Hf3N4, and AIN interlayers. WN/A1203/AIN gate …
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Deposition and Characterization of Ceramic Thin Films and a New Experimental Approach to Evaluate the Mechanical Integrity of Film/Substrate Interfacial Layers
… electron microscope (TEM). The effective interfacial shear strength between TiN and CrN thin films and their substrates was evaluated through a substrate- tension method and a newly introduced experimental testing method involving FIB script-milling of film/substrate specimens into …
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Multiple Wave Scattering and Calculated Effective Stiffness and Wave Properties in Unidirectional Fiber-Reinforced Composites
… m, B and Y for fiber-reinforced composites with interfacial layers between fibers and matrix. The material properties of the layers are assumed to be either linearly or exponentially distributed between the fibers and matrix. A concise formula is obtained where parameters can be computed using a …
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Theory and experiments of type-II superlattice infrared photodetectors
… good agreement with experimental data. The interfacial effect in type-II superlattices is investigated. It is shown that the interfacial layers can be employed not only to balance lattice strain and reduce detector dark current, but also to simultaneously increase the cutoff wavelength and …
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Transport modeling of simple fluids and nano-colloids : thermal conduction mechanisms and coarse projection
… unusual exchange of potential energy among the interfacial fluid atoms. For small nano-clusters, the interfacial layers interact with each other to form a percolating network. The research findings highlight the importance of surface interactions and show that the interfacial thermal resistance …
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Photosynthesis-inspired device architectures for organic photovoltaics
… from the antenna to the charge generating layers via surface plasmon polariton modes in the interfacial thin silver contact and via radiation into waveguide modes. We experimentally demonstrate devices with both single layer antennas and strongly absorbing resonant cavity antennas. We …
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Adhesion/Diffusion Barrier Layers for Copper Integration: Carbon-Silicon Polymer Films and Tantalum Substrates
… is to develop novel organic polymers as Cu/low-k interfacial layers and to investigate popular barrier candidates, such as clean and modified tantalum (Ta) substrates. Carbon-silicon (C-Si) polymeric films have been formed by electron beam bombardment or ultraviolet (UV) radiation of molecularly …
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Spectroscopic characterisation of high dielectric constant materials on semiconducting surfaces
… radiation. The self-limiting growth of an interfacial hafnium silicate layer was observed and the substrate temperature during the hafnium oxide depositions was found effect the onset temperature of hafnium silicide formation during post-deposition anneals. Hafnium oxide has also been grown …
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TiN/HfO2/SiO2/Si gate stacks reliability : Contribution of HfO2 and interfacial SiO2 layer
… of transistors (45nm and beyond) which has an interfacial layer (IL: typically SiO_2) between high-[kappa] and the substrate, needs to be investigated. To understand the breakdown mechanism of high-[kappa]/SiO_2 gate stack completely, it is important to study this multi-layer structure …
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Probing nano-scale atomic and electronic structures of iron-based superconductors
… Epitaxial Fe1+yTe thin-films with sharp 1-2 interfacial layers grown by molecular beam epitaxy (MBE) on LaAlO3 become superconducting when exposed to oxygen after growth at elevated sample temperatures. The interfacial strain caused by lattice mismatch is not detected in the thin-film. …
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Dynamic and equilibrium adsorption behaviour of ß-lactoglobulin at the solution/tetradecane interface: Effect of solution concentration, pH and ionic strength
… and equilibrium pressures of BLG adsorbed layers at the solution/tetradecane (W/TD) interface has been investigated. Dynamic interfacial pressure (Π) and interfacial dilational elastic modulus (E’) of BLG solutions for various concentrations at three different pH values of 3, 5 and 7 at a …
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The linear and nonlinear rheology of multiscale complex fluids
… exhibited at early times by viscoelastic interfacial layers upon the imposition of a constant stress, and the subsequent long time power law creep. We also analyze the small strain lubrication flow regime of a typical tack experiment performed on a crosslinked power law gel, where the …
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Adsorption Kinetics and Phase Behavior of Particles Adsorbed at an Interface
… include phase transitions in amphiphilic monolayers, emulsion stability due to particle adsorption at interfaces, and melting at an interface.</p> <p>In this thesis, a new approach for deriving the equation of state for a two-dimensional lattice gas is proposed, based on arguments similar to …
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Coarse-grained simulations to predict structure and properties of polymer nanocomposites
… class of materials characterized by their large interfacial areas between the host polymer and nanofiller. This unique feature, due to the size of the nanofiller, is understood to be the cause of enhanced mechanical, electrical, optical, and barrier properties observed of PNCs, relative to the …