Search Results - "STEPHENSON, G. B"
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Mesostructuring in Liquid–Liquid Extraction Organic Phases Originating from Critical Points
Published in The journal of physical chemistry letters (24-06-2021)“…Organic phase structure plays an important role in solute extraction energetics and phase behavior of liquid–liquid extraction (LLE) systems. For a binary…”
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Three-dimensional imaging of dislocation dynamics during the hydriding phase transformation
Published in Nature materials (01-05-2017)“…Crystallographic imperfections significantly alter material properties and their response to external stimuli, including solute-induced phase transformations…”
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Reversible chemical switching of a ferroelectric film
Published in Physical review letters (30-01-2009)“…According to recent experiments and predictions, the orientation of the polarization at the surface of a ferroelectric material can affect its surface…”
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Towards ultrafast dynamics with split-pulse X-ray photon correlation spectroscopy at free electron laser sources
Published in Nature communications (27-04-2018)“…One of the important challenges in condensed matter science is to understand ultrafast, atomic-scale fluctuations that dictate dynamic processes in equilibrium…”
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Stability Limits and Defect Dynamics in Ag Nanoparticles Probed by Bragg Coherent Diffractive Imaging
Published in Nano letters (08-03-2017)“…Dissolution is critical to nanomaterial stability, especially for partially dealloyed nanoparticle catalysts. Unfortunately, highly active catalysts are often…”
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Advancing Chemical Separations: Unraveling the Structure and Dynamics of Phase Splitting in Liquid–Liquid Extraction
Published in The journal of physical chemistry. B (31-03-2022)“…Liquid–liquid extraction (LLE), the go-to process for a variety of chemical separations, is limited by spontaneous organic phase splitting upon sufficient…”
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Nanoscale Critical Phenomena in a Complex Fluid Studied by X-Ray Photon Correlation Spectroscopy
Published in Physical review letters (18-09-2020)“…The advent of high-speed x-ray photon correlation spectroscopy now allows the study of critical phenomena in fluids to much smaller length scales and over a…”
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Nanometer linear focusing of hard x rays by a multilayer Laue lens
Published in Physical review letters (31-03-2006)“…We report on a type of linear zone plate for nanometer-scale focusing of hard x rays, a multilayer Laue lens (MLL), produced by sectioning a multilayer and…”
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Imaging local polarization in ferroelectric thin films by coherent x-ray Bragg projection ptychography
Published in Physical review letters (25-04-2013)“…We used x-ray Bragg projection ptychography (BPP) to map spatial variations of ferroelectric polarization in thin film PbTiO3, which exhibited a striped…”
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High contrast x-ray speckle from atomic-scale order in liquids and glasses
Published in Physical review letters (02-11-2012)“…The availability of ultrafast pulses of coherent hard x rays from the Linac Coherent Light Source opens new opportunities for studies of atomic-scale dynamics…”
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Single shot spatial and temporal coherence properties of the SLAC Linac Coherent Light Source in the hard x-ray regime
Published in Physical review letters (11-01-2012)“…We measured the transverse and longitudinal coherence properties of the Linac Coherent Light Source (LCLS) at SLAC in the hard x-ray regime at 9 keV photon…”
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Bragg Coherent Diffractive Imaging of Zinc Oxide Acoustic Phonons at Picosecond Timescales
Published in Scientific reports (29-08-2017)“…Mesoscale thermal transport is of fundamental interest and practical importance in materials such as thermoelectrics. Coherent lattice vibrations (acoustic…”
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Stabilization of monodomain polarization in ultrathin PbTiO3 films
Published in Physical review letters (31-03-2006)“…Using in situ high-resolution synchrotron x-ray scattering, the Curie temperature TC has been determined for ultrathin c-axis epitaxial PbTiO3 films on…”
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Single shot speckle and coherence analysis of the hard X-ray free electron laser LCLS
Published in Optics express (21-10-2013)“…The single shot based coherence properties of hard x-ray pulses from the Linac Coherent Light Source (LCLS) were measured by analyzing coherent diffraction…”
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Interfacial charge and strain effects on the ferroelectric behavior of epitaxial (001) PbTiO3 films on (110) DyScO3 substrates
Published in Applied physics letters (31-03-2014)“…In-situ synchrotron x-ray observations reveal that the ferroelectric behavior of epitaxial (001) PbTiO3 thin films grown on (110) DyScO3 substrates depends on…”
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Direct structural determination in ultrathin ferroelectric films by analysis of synchrotron x-ray scattering measurements
Published in Physical review. B, Condensed matter and materials physics (01-04-2005)“…In order to better understand ferroelectricity in thin films, it is important to explore the atomic-scale structure and the spatial distribution of…”
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Clocking femtosecond X rays
Published in Physical review letters (25-03-2005)“…Linear-accelerator-based sources will revolutionize ultrafast x-ray science due to their unprecedented brightness and short pulse duration. However,…”
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On the production of He, C, and N by low- and intermediate-mass stars: a comparison of observed and model-predicted planetary nebula abundances
Published in Monthly notices of the Royal Astronomical Society (01-01-2018)“…AbstractThe primary goal of this paper is to make a direct comparison between the measured and model-predicted abundances of He, C, and N in a sample of 35…”
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Equilibrium polarization of ultrathin PbTiO3 with surface compensation controlled by oxygen partial pressure
Published in Physical review letters (25-10-2011)“…We present a synchrotron x-ray study of the equilibrium polarization structure of ultrathin PbTiO(3) films on SrRuO(3) electrodes epitaxially grown on SrTiO(3)…”
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