Search Results - "Donald, Scott B"

Morphological and chemical characteristics of oxide scales formed on δ-phase plutonium metal alloys II: 2.0 at% Ga by Donald, Scott B., Chung, Brandon W.

“…•Internal structure of oxide scale characterized using FIB-SEM and AES.•Initial scale grown during storage composed of oxide with variable thickness and…”
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Morphological and chemical characteristics of oxide scales formed on δ-Phase plutonium metal alloys I: 3.5 at% ga by Donald, Scott B., Chung, Brandon W.

“…•Internal structure of oxide scale characterized using FIB-SEM and AES.•Initial scale grown during storage composed of dense oxide with transverse…”
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Evidence of an oxidation induced phase transformation for a delta phase plutonium-gallium alloy by Donald, Scott B., Stanford, Jeff A., Talbot, William A., Saw, Cheng K., Chung, Brandon W., McLean, W.

“…The oxidation of an ~1.5 at% Ga plutonium metal alloy in dry air as a function of time was studied using a combination of FIB-SEM, AES, and XRD. Analysis of…”
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Parabolic oxidation kinetics of a plutonium alloy at room temperature by Donald, Scott B., Stanford, Jeff A., Haschke, John M., Ashley, Denise D., Talbot, William A., Roberts, David J., Nelson, Art J., Chung, Brandon W., McLean, W.

“…•Oxidation of a plutonium metal alloy was measured as a function of relative humidity and oxygen partial pressure.•Oxide thickness and chemistry were…”
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Rice–Ramsperger–Kassel–Marcus Simulation of Hydrogen Dissociation on Cu(111): Addressing Dynamical Biases, Surface Temperature, and Tunneling by Donald, Scott B, Harrison, Ian

“…The effects of dynamics, surface temperature, and tunneling on the dissociative chemisorption of hydrogen on Cu(111) are explored using a dynamically biased…”
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Relative impact of H2O and O2 in the oxidation of UO2 powders from 50 to 300 °C by Donald, Scott B., Davisson, M. Lee, Dai, Zurong, Roberts, Sarah K., Nelson, Art J.

“…The reaction of water and molecular oxygen with stoichiometric uranium dioxide (i.e. UO2) powder at elevated temperature was studied by high-resolution x-ray…”
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Angle-Resolved Thermal Dissociative Sticking of Light Alkanes on Pt(111): Transitioning from Dynamical to Statistical Behavior by Navin, Jason K, Donald, Scott B, Harrison, Ian

“…Gas-surface reactivity involving small molecules can exhibit significant dynamical deviations away from statistical behavior that complicate quantitative…”
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Ultrahigh GaN:SiO2 etch selectivity by in situ surface modification of SiO2 in a Cl2-Ar plasma by Frye, Clint D, Donald, Scott B, Reinhardt, Catherine E, Nikolic, Rebecca J, Voss, Lars F, Harrison, Sara E

“…The realization of vertical GaN devices requires deep plasma etching and is contingent on high mask selectivity. In this work, we show that SiO2 can be an…”
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High-iron ferric glass by Donald, Scott B., Swink, Amy M., Schreiber, Henry D.

“…Iron commonly exists as an equilibrium mixture of ferrous ions, Fe 2+, and ferric ions, Fe 3+, in glass. Fe 3+ is a strong absorber of ultraviolet light and…”
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Morphological and chemical characteristics of oxide scales formed on δ-phase plutonium metal alloys II: 2.0 at% Ga by Donald, Scott B., Chung, Brandon W.

“…The focused ion-beam scanning electron microscopy (FIB-SEM) and three-dimensional (3D) microscopy were applied to characterize the subsurface morphological…”
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Impact of carrier wafer on etch rate, selectivity, morphology, and passivation during GaN plasma etching by Frye, Clint D., Donald, Scott B., Reinhardt, Catherine, Voss, Lars F., Harrison, Sara E.

“…The choice of carrier wafer was found to significantly influence etch rates, selectivity, and morphology in GaN micropillar etching in a Cl2-Ar high-density…”
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Evidence of an oxidation induced phase transformation for a delta phase plutonium-gallium alloy by Donald, Scott B., Stanford, Jeff A., Talbot, William A., Saw, Cheng K., Chung, Brandon W., McLean, W.

“…The oxidation of an ~1.5 at% Ga plutonium metal alloy in dry air as a function of time was studied using a combination of FIB-SEM, AES, and XRD. Analysis of…”
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An XPS study on the impact of relative humidity on the aging of UO2 powders by Donald, Scott B., Dai, Zurong R., Davisson, M. Lee, Jeffries, Jason R., Nelson, Art J.

“…High resolution x-ray photoemission spectroscopy (XPS) was used to characterize the chemical speciation of high purity uranium dioxide (UO2) powder samples…”
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ICP etching of GaN microstructures in a Cl2–Ar plasma with subnanometer-scale sidewall surface roughness by Frye, Clint D., Reinhardt, Catherine E., Donald, Scott B., Voss, Lars F., Harrison, Sara E.

“…Substrate temperature, RF power, and ICP power were investigated for their effects on GaN micropillar sidewall roughness and etch characteristics. Elevated…”
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Variation in plutonium dioxide sputter yields for 1–5 keV Ar+ ions by Donald, Scott B., Stanford, Jeff A., Gollott, Rory T., Roberts, David J., Nelson, Art J., McLean, W.

“…An oxide layer with a known thickness and chemistry was grown on delta stabilized Pu and sputtered with 1–5 keV Ar+ ions over a range of incident ion angle…”
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Submicrometer spectromicroscopy of UO2 aged under high humidity conditions by Ditter, Alex S., Pacold, Joseph I., Dai, Zurong, Lee Davisson, M., Vine, David, Donald, Scott B., Chung, Brandon W., Shuh, David K.

“…The oxidation of uranium dioxide is a complicated process, depending on factors including humidity, temperature, and microstructure. To further determine the…”
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Application of linear least squares to the analysis of Auger electron spectroscopy depth profiles of plutonium oxides by Donald, Scott B., Stanford, Jeff A., McLean, William, Nelson, Art J.

“…Application of the linear least squares (LLS) methodology allows for quantitative determination of variation in material composition with depth. LLS fits were…”
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Submicrometer spectromicroscopy of UO 2 aged under high humidity conditions by Ditter, Alex S., Pacold, Joseph I., Dai, Zurong, Lee Davisson, M., Vine, David, Donald, Scott B., Chung, Brandon W., Shuh, David K.

“…The oxidation of uranium dioxide is a complicated process, depending on factors including humidity, temperature, and microstructure. To further determine the…”
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XPS and SIMS study of the surface and interface of aged C+ implanted uranium by Donald, Scott B., Siekhaus, Wigbert J., Nelson, Art J.

“…X-ray photoelectron spectroscopy in combination with secondary ion mass spectrometry depth profiling were used to investigate the surface and interfacial…”
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Parabolic oxidation kinetics of a plutonium alloy at room temperature by Donald, Scott B., Stanford, Jeff A., Haschke, John M., Ashley, Denise D., Talbot, William A., Roberts, David J., Nelson, Art J., Chung, Brandon W., McLean, W.

“…Auger electron spectroscopy (AES) was used to characterize the oxide scale formed on an ~0.5 wt. % Ga plutonium metal alloy. Analysis of changes to the…”
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