Gram‐Scale Synthesis of Soluble, Near‐Monodisperse Gold Nanorods and Other Anisotropic Nanoparticles

Abstract

An aqueous surfactant-based colloidal chemical method is reported for the synthesis of anisotropic noble-metal nanoparticles on the milligram to multigram scale. Fine control of the nucleation-growth kinetics and rodlike micelle-induced breaking of symmetry at the early stage of particle growth are responsible for high-quality anisotropic nanoparticles. Near-monodisperse gold and silver nanorods, spheroids, nanowires, platelets, or cubes of 4–50 nm dimension and controllable aspect ratio can be prepared. The method may also be extended to semiconductor systems.