One-Step One-Phase Synthesis of Monodisperse Noble-Metallic Nanoparticles and Their Colloidal Crystals

摘要

Noble-metallic nanoparticles have attracted increasing research attention during the past decades due to their interesting size-dependent optical,electronic,and catalytic properties.Nanoparticles with a narrow size distribution can further function as building blocks for the construction of higher-ordered superlattices that exhibit collective properties of individual nanoparticles.Although several synthetic routes of noble-metallic nanoparticles have been developed,the challenge remains of obtaining monodisperse nanoparticles with size <10 nm on a large scale.Since the first report in 1994,the syntheses of metallic nanoparticles with size less than 10 nm have been dominated by the Brust method,a two-phase protocol that can be easily scaled up to gram scale.