Watching nanoparticles disappear

What happens when you etch nanoparticles? This process has now been recorded in real time and in situ by our collaborator Xingchen Ye using a small droplet sandwiched between two graphene sheets. Alberto Leonardi resolved details of the anisotropic kinetics of their gradual dissolution using molecular dynamics and lattice Monte Carlo simulations. Together, experiment and simulation help understanding the mechanism of etching at atomistic resolution, which is important to design more stable catalysts.

Schematic illustration of a graphene liquid cell encapsulating a solution of Pd@Au nanocubes and oxidative etchants. Carbon atoms of graphene sheets are enlarged for clarity purpose.

Read about this work here:

Lei Chen, Alberto Leonardi, Jun Chen, Muhan Cao, Na Li, Dong Su, Qiao Zhang, Michael Engel, Xingchen Ye
Imaging the Kinetics of Anisotropic Dissolution of Bimetallic Core-Shell Nanocubes using Graphene Liquid Cells
Nature Communications 11, 3041 (2020)