37 citations · 87 across the 8 of their papers we have counts for
8 papers
Gas-induced segregation in Pt-Rh alloy nanoparticles observed by in-situ Bragg coherent diffraction imaging
Tomoya Kawaguchi, Thomas F. Keller, Henning Runge +11
Bimetallic catalysts can undergo segregation or redistribution of the metals driven by oxidizing and reducing environments. Bragg coherent diffraction imaging (BCDI) was used to re…
Bragg Coherent Modulation Imaging: Strain- and Defect- Sensitive Single Views of Extended Samples
A. Ulvestad, W. Cha, I. Calvo-Almazan +5
Nanoscale heterogeneity (including size, shape, strain, and defects) significantly impacts material properties and how they function. Bragg coherent x-ray imaging methods have emer…
A Brief Review of Current Lithium Ion Battery Technology and Potential Solid State Battery Technologies
Andrew Ulvestad
Solid state battery technology has recently garnered considerable interest from companies including Toyota, BMW, Dyson, and others. The primary driver behind the commercialization…
Accurate, rapid identification of dislocation lines in coherent diffractive imaging via a min-max optimization formulation
A. Ulvestad, M. Menickelly, S. M. Wild
Defects such as dislocations impact materials properties and their response during external stimuli. Defect engineering has emerged as a possible route to improving the performance…
Stability Limits and Surface Chemistry of Ag Nanoparticles in Non-Adsorbing Electrolytes Probed by Bragg Coherent Diffractive Imaging
Y. Liu, P. P. Lopes, W. Cha +9
Surface chemistry is important across diverse fields such as corrosion and nanostructure synthesis. Unfortunately, many as-synthesized nanomaterials, including partially dealloyed…
In-situ 3D Imaging of Catalysis Induced Strain in Gold Nanoparticles
Andrew Ulvestad, Kiran Sasikumar, Jong Woo Kim +9
Multi-electron transfer processes, such as hydrogen and oxygen evolution reactions, are crucially important in energy and biological science but require favorable catalysts to achi…
Chrono CDI: Coherent diffractive imaging of time-evolving samples
A. Ulvestad, A. Tripathi, S. O. Hruszkewycz +4
Bragg coherent x-ray diffractive imaging is a powerful technique for investigating dynamic nanoscale processes in nanoparticles immersed in reactive, realistic environments. Its te…
Creating universes with thick walls
Andrew Ulvestad, Andreas Albrecht
We study the dynamics of a spherically symmetric false vacuum bubble embedded in a true vacuum region separated by a "thick wall", which is generated by a scalar field in a quartic…