Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D

A comparison of different oxidation results in nickel-cobalt nanoparticles. While a small percentage of the particles form hollow spheres (top), the vast majority form a porous Swiss-cheese-like structure (b.) that has much greater surface area for the same volume. Image: Brookhaven NL

Swiss-cheese surface area

Imaging the nanoscale details