Studying Internal Compositions of Binary Alloy Pd-Rh Nanoparticles Using Bragg Coherent Diffraction Imaging

TL;DR

This paper demonstrates the use of Bragg coherent diffraction imaging to visualize and analyze the internal compositional distribution and strain in Pd-Rh alloy nanoparticles at thermal equilibrium.

Contribution

It introduces a method to directly relate lattice strain to compositional deviations in alloy nanoparticles using BCDI.

Findings

Successful imaging of internal composition in Pd-Rh nanoparticles.

Established the correlation between lattice strain and alloy composition.

Provided experimental validation of the BCDI technique for alloy analysis.

Abstract

Bragg coherent diffraction imaging (BCDI), the well-established technique for imaging internal strain of nanoparticles, was used to image the internal compositional distribution of binary alloys in thermal equilibrium. The images experimentally obtained for Pd-Rh alloy nanoparticles are presented and discussed. The direct correspondence between the lattice strain and the compositional deviation is discussed in the derivation of the BCDI displacement field aided by illustrations.