Size control of monodisperse Au nanoparticles synthesized via a citrate reduction process associated with a pH-shifting procedure†
Abstract
This report proposes a procedure to synthesize monodisperse Au nanoparticles of different mean sizes (6–15 nm) under a constitute reaction condition only by altering the interval time between additions of citric acid and NaOH solutions into boiling HAuCl4 solution without any growth modifiers.