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 55 for “"interfacial energy"”.
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The effect of nanoscale structure on interfacial energy
… fronts to the surfaces of biological cells, interfacial properties determine the interactions between a solid and a liquid. Interfaces, specifically liquid-solid interfaces, play important roles in many fields of science. In the field of biology, interfaces are fundamental in determining …
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Characterization of Structure and Interfacial Energy Transfer of Molecular Thin Films
… occur. These reactions are of interest in solar energy and photosynthesis studies.
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Interfacial Energy Transfer in Small Hydrocarbon Collisions with Organic Surfaces and the Decomposition of Chemical Warfare Agent Simulants within Metal-Organic Frameworks
A molecular-level understanding of gas-surface energy exchange and reaction mechanisms will aid in the prediction of the environmental fate of pollutants and enable advances toward catalysts for the decomposition of toxic compounds. To this end, molecular beam scattering experiments performed in an …
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ATOMISTIC SIMULATION AND FIRST PRINCIPLES CALCULATION OF INTERFACIAL ENERGETICS OF GALVANIZED ADVANCED HIGH STRENGTH STEELS
… as pinholes and bare spots. To investigate the interfacial structures between the steel substrate and the Zn overlay, extensive experimental studies have been conducted, by using post-mortem scanning electron microscopy (SEM), transmission electron microscopy (TEM) observation, along with other …
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Estudo da fragilização por hidrogênio de um aço inoxidável super martensítico através da teoria da redução da energia interfacial
… hydrogen embrittlement by using the theory of interfacial energy reduction. In order to apply this theory super martensitic stainless steel was used. This alloy is extensively used by the oil industry, due to its high mechanical resistance, toughness and corrosion resistance. However, this …
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Analysis of heat transfer and fluid flow in an evaporating sessile droplet for evaporative cooling applications
… process, it is essential to understand the interfacial energy transport mechanisms involved in transporting energy to the liquid-vapour interface from the solid substrate and the vapour surrounding. A series of experiments were conducted under different experimental conditions to understand …
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Delamination of Thin Film Patterns Using Laser-Induced Stress Waves
A more complete description of the dynamic interfacial crack propagation is obtained by monitoring the crack tip location during the delamination event. The dynamic delamination technique eliminates the need for external contact and complex bonding processes. The stress wave generation is highly …
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The role of defects during precipitate growth in a Ni-45wt% Cr alloy
The defect structure, atomic structure, and energy of the interphase boundaries between an fcc matrix and a lath-shaped bcc precipitate in Ni-45 wt% Cr were investigated. The interfacial structure on the side facet of the precipitate consists of regular structural ledges and misfit dislocations. No …
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Design of Heterogeneous Surfaces for Polymer Adsorption
… scale. The kinetics indicated that macroscopic interfacial energy as well as the length scale of heterogeneity played a critical role in governing the adsorption characteristics. Morphological measurements by tapping mode AFM revealed that when the dimension of surface heterogeneity was …
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The Effects of Molecular Architecture on the Rheological and Mechanical Properties of Polymeric Systems
… of HBPs. Therefore, in order to minimize the interfacial energy, it was observed that the PEI HBPs with lower surface energies than PS segregated to the low energy air-interface, in turn decreasing the surface energy of PS films. On the other hand, higher surface energy PEI HBPs concentrate …
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Nanoscale self-assembly and nonequilibrium transformation of colloidal nanoparticles visualized by liquid-phase TEM
… interactions and the resultant complex free-energy landscapes for nanosized entities. During my Ph. D., my research has provided insights in charting the energy diagram, fundamental interactions, formation of prenucleation precursors and interfacial energy of crystals using in-situ …
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Experiments and theory of selective assembly using topography and ultrasonically-induced fluid forces
… Based on the understanding of hydrophobic interfacial energy and the flow fields created by ultrasound, a theory was proposed to describe the mechanism of component removal and was carefully verified with additional experiments. In the present work, scalability and repeatability of the …
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Novel Charging Station and Computational Modeling for High Thermal Conductivity Heat Pipe Thermal Ground Planes
… of this model is that it relies on empirical interfacial heat transfer coefficient data to very accurately model the interfacial energy balance at the vapor-liquid saturated wick interface. Wick samples for a TGP are tested in an experimental setup to measure the interfacial heat transfer …
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Purification of metals through filtration and electromagnetic separation
… wall, (2) effect of inclusion bridges and (3) interfacial energy between collided inclusions"--Abstract, page iv.</p>
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Texture improvements in the high-temperature superconducting Bi₂Sr₂Ca₁Cu₂Ox̳/Ag system via surface energy driven grain alignment
… Experiments were based on a theoretical surface energy model proposing enhanced texture of the oxide at the Ag interface after melt-processing. Two classes of samples were processed and compared. Bi-2212 powder was deposited on a thin-foil Ag surface and was melt-processed to yield a 20 ± 10 …
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Effect Of Annealing On Copper Thin Films:the Classical Size Effect And Agglomeration
… process resulting in a reduction of the free energy of the film–substrate system and can occur well below the melting point of the material by surface and interfacial diffusion. The reduction of film-substrate interfacial energy, film-surface interfacial energy and stresses within the film are …
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Kinetics of Nesquehonite Nucleation
… lattice and mineral surfaces will develop. The interfacial energy plays important roles in mineral nucleation. The surface energy can be influenced by many factors including temperature, solution chemistry, ion absorptions, and shape/size of nuclei. Previous research studied the effect of …
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Stress and structure evolution during Volmer-Weber growth of thin films
… methods (FEM) as the energetic balance between interfacial energy reduction and strain energy generation resulting from grain boundary formation. The magnitude of the island-coalescence stress calculated using FEM was found to decrease dramatically with decreasing island-substrate contact angle.
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Multilayer composite photonic bandgap fibers
… strategy and ultimate target length scale. Interfacial energy is measured in a chalcogenide glass / organic polymer composite system selected for fiber fabrication. A classical capillary instability model is employed to predict the feasibility of fiber fabrication based on material …
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Fabrication and mechanical characterization of liquid-in-solid elastomeric soft composites
… two-phase material incorporating liquid-solid interfacial energy, how multiple liquid inclusions would affect the macroscopic mechanical properties of composites are not yet fully understood. In this thesis research, by selecting polydimethylsiloxane (PDMS) as the matrix material and glycerol …
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