Near-surface strain in icosahedra of binary metallic alloys: segregational versus intrinsic effects.

Abstract

A systematic structural analysis of FePt, CuAu, and Au icosahedral nanoparticles is presented. The uncovered particles are prepared by inert gas condensation and thermally equilibrated through in-flight optical annealing. Aberration-corrected high-resolution transmission electron microscopy reveals that the crystal lattice is significantly expanded near the particle surface. These experimental findings are corroborated by molecular statics simulations that show that this near-surface strain originates from both intrinsic strain due to the icosahedral structure and a partial segregation of the larger of the two alloy constituents to the particle surface.

DOI: 10.1021/nl404268f

Cite this paper

@article{Pohl2014NearsurfaceSI, title={Near-surface strain in icosahedra of binary metallic alloys: segregational versus intrinsic effects.}, author={Darius Pohl and Ulrich Wiesenh{\"{u}tter and Elias Mohn and Ludwig Schultz and Bernd Rellinghaus}, journal={Nano letters}, year={2014}, volume={14 4}, pages={1776-84} }