Asymmetric hetero-assembly of colloidal nanoparticles through “crash reaction” in a centrifugal field†
Abstract
Asymmetric hetero-assembly of two kinds of colloidal nanoparticles (NPs) was achieved by “crash reaction” in a density gradient centrifugation system using Au NPs as an example. Centrifugal force was applied to overcome the Brownian motion effect and cause NPs’ directional movements. A water–oil interface was introduced to increase the effective collision probability.