Purification of dodecanethiol derivatised gold nanoparticles.
Monolayer protected gold nanoparticles synthesised by a two-phase method contain a significant amount of tetraoctylammonium bromide (TOABr), the quaternary ammonium salt used as the phase transfer reagent, as a persistently retained impurity. A simple purification protocol is described.
Waters
Cecilia A
CA
Centre for Nanoscale Science, Department of Chemistry, The University of Liverpool, Liverpool, UK L69 7ZD.
Mills
Allan J
AJ
Johnson
Kathleen A
KA
Schiffrin
David J
DJ