Time Resolved Studies of Phase ~ ~ ~j Transformations Using High Temperature Powder Diffraction

In-situ Grain Rotation in Annealing via Polycrystal Energy-Resolved Laue Diffraction

In principle, a polycrystal X-ray Laue pattern can contain reflections from every irradiated grain. The present communication examines how this fact can be used to good effect in in-situ experimentation. A critical step is indexation of the pattern at time equals zero. The more grains that can be indexed in a single pa...

Kinetic retention of an anisotropic lattice response in pure FAPbI₃ by flash infrared annealing

Far-from-equilibrium crystallization can access metastable states absent from equilibrium phase diagrams, but using the processing trajectory to select such states in functional semiconductors remains underexplored in halide perovskites. Here we examine pure formamidinium lead iodide (FAPbI₃), whose photoactive structu...

Molecular dynamics simulations for Debye-temperature extraction in compressed metals

Accurate temperature determination in dynamically compressed materials remains challenging because conventional thermometry is often unavailable on nanosecond timescales. The Debye temperature (θD) characterizes vibrational stiffness and governs Debye–Waller (DW) attenuation in x-ray diffraction, making its accurate de...

pressure-induced over-hydration of zeolite K AlSi-L

Oxygen on Rh(100) revisited with ultra-high precision

We have reanalyzed the 0.25 and 0.50 monolayer (ML) phases of oxygen on the catalytically important Rh(100) surface by quantitative low-energy electron diffraction (LEED), variable-temperature scanning tunneling microscopy (STM) and density functional theory (DFT). For both phases, the crystallographic structure could...

Room Temperature Structures of Solvated Organic Molecules Enabled by Liquid Cell Electron Diffraction

Electron diffraction (MicroED/3DED) enables atomic structure determination from nano- or microcrystals, including dry crystalline powders or mixtures. However, radiation damage and instrument vacuum can limit the interrogation of molecular crystals in solution at room temperature. We now present a strategy for room-t...