Analysis of few-nm sized metal nanoparticles on carbon nanostructures

HAADF-STEM tomography has been used to analyse the size and distribution of encapsulated gold nanoparticles (NPs) in hollow graphitised carbon nanofibres HAADF combined with a rolling-ball filter allows few-nm sized metallic NPs to be imaged with sufficient contrast against the higher volume carbon support structures to enable tomographic reconstruction