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 65 for “"Size dependence"”.
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Size Dependence of the Electrical Characteristics of Silicon Nanoparticles
… properties of silicon nanoparticles with sizes rang- ing from 2.9 to 1 nm in diameter. Using a scanning tunneling microscope we studied the electronic structure of the particles. Resonant tunneling through hole states was observed when the samples were excited with light. The energy levels …
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Size dependence of mechanical responses of materials in small-volume structures
… of the materials exhibit a strong dependence on their physical size such as film thickness and line width, as well as their microstructural length scale such as grain size. In this thesis, analytical, experimental, and computational approaches are utilized to elucidate the effect of …
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Size dependence and odd/even effect in the melting of 2D lamellar crystals
Made available in DSpace on 2013-08-22T16:42:11Z (GMT). No. of bitstreams: 2 Lito_de la Rama.pdf: 8587134 bytes, checksum: 3348b80b4e5c0b0fcae5c001fcf7a311 (MD5) license.txt: 4065 bytes, checksum: fdeb9e289c81786abacb63b0b9cac6f4 (MD5)
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Particle Size Dependence on the Luminescence Spectra of Eu3+:Y2O3 and Eu3+:CaO
… changes that can occur when the particle size is reduced from the bulk to nanometer regime. The use of laser spectroscopy to probe two nanocrystalline structures, Eu3+:Y2O3 and Eu3+:CaO, was investigated. The nanocrystalline structures were prepared by the laser-vaporization-gas-phase …
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Expanding the potential of gold nanorods: From size dependence and intrinsic anisotropy to formulating a new class of surface coatings
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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Storage and transport of energy in nanostructures
… are different from their bulk counterparts. The size dependence of thermo physical properties is attributed to changing energy and mass transport phenomenon with varying length scales. This size dependence can be profitably leveraged to build cheap and efficient energy storage and harvesting …
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Characterization of Oslds For Use In Small Field Photon Beam Dosimetry
… OSL dose calculation formula, scatter and field size dependence factor. The field size dependence factor was proven to be unity. The minimum field size the masked OSLD system can accommodate as an audit tool was determined to be 10 mm diameter field for circular cones or 1 x 1 cm<sup>2</sup> …
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Electronic and Plasmonic Properties of Nano-Sized Gold/Strontium Titanate Interface
In this thesis, nano-sized metal/oxide interfaces are fabricated to determine the size dependence of electronic and resistive switching properties, effect of atomic structure on the orientation dependence of electronic properties, and mechanisms of plasmon-induced current enhancement. A combination …
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Studies on Thermodynamic Properties of Nanoclusters With Thin-Film Nanocalorimetry
… may provide a direct experimental probe to the size-dependence of surface energy.
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Volumetric heat capacity enhancement in ultrathin fluorocarbon polymers for capacitive thermal management
… in sensible storage density arising from size e ects in thin polymer lms. We design and fabricate a micro-calorimeter to measure the volumetric heat capacity of nanometer scale thin uorocarbon polymer lms. The storage density increases approximately three times as the lm thickness …
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Cloud Chemical Heterogeneity and Its Influence on Aqueous sulfur(IV) Oxidation
… composition among cloud and fog drops of diverse sizes were investigated at several locations across the United States. Chemical species including acidity, total sulfur (IV), hydrogen peroxide, formaldehyde, hydroxymethanesulfonate (HMS) and trace metals iron and manganese were measured. Samples …
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Thermodynamics of 5-flavor QCD
… and O(4) universality classes and their finite size dependence using Monte Carlo simulations of improved ϕ⁴ models. We extract parametrizations of the Z(2) and O(2) scaling functions to high precisions by fitting data from simulations of the respective spin models.
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Electrochemical and NMR Studies of Fuel Cell Catalysts and Carbon Monoxide Surface Diffusion
… factors (D 0) show the CO coverage dependence. Ed decreases linearly with increasing CO coverage. This indicates that the CO-CO repulsive interactions make a strong influence on the coverage dependence of the activation energy. The pre-exponential factor, D0, shows the exponential …
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The general continuum model for structured populations, with two case studies in plant ecology
… It is shown that using only the average size is insufficient. A class of models which includes all possible combinations of three types of size dependence in somatic growth and mortality is formulated. Qualitative parameter estimation for the various models yields size distributions that …
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Theoretical study of nanocrystals and other functional nanostructures of silicon and alternative group - 14 elements
… electronic, and optical properties in terms of size, growth pattern and surface conditions. An important outcome of such study, besides the very satisfactory agreement with experimental measurements for nanocrystals (up to 32 Å in diameter), is the judicious extrapolation of the nanoscale …
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Continuum models of deformation mechanisms in nanocrystalline metals
… metals are polycrystalline metals with grain sizes in the nanometer range. They have attracted significant interest in recent years due to their unique mechanical and electrical properties. The main objective of this thesis is to develop continuum-scale descriptions of nanoscale deformation …
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How does adhesion influence the small aggregates in Saturn's rings
Particles in Saturn’s main rings range in size from dust to even kilometer-sized objects. Their size distribution is thought to be a result of competing accretion and fragmentation processes. While growth is naturally limited in tidal environments, frequent collisions among these objects may …
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Development of Shell-Crosslinked Knedel-like Nanoparticles as Intracellular Delivery Vehicles and Gene Regulation Agents
… nanoparticles exhibited different but controlled sizes and shapes, depending on the conditions for their preparation. To incorporate functionality into these materials, both pre- and post-particle functionalization methods, as well as their combination, were used. The nanostructures involved in …
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Extrinsic Cohesive Modeling of Dynamic Fracture and Microbranching Instability Using a Topological Data Structure
… by the CZM simulations. To better analyze mesh size dependence of the numerical scheme, an investigation of cohesive zone size is also presented, which indicates limitations of conventional cohesive zone size estimates in dynamic and rate-dependent problems.
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A hybrid discrete element and continuum method for multiscale granular media modeling
… capturing certain effects such as particle size dependence. In discrete element methods (DEM), every grain and the interactions between them are simulated. DEM is accurate but solve time scales poorly with large grain numbers. Here, we present a hybrid simulation scheme, which seeks a …
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