CORE CONTAINING PLATINUM NANODOTS ASSEMBLIES AND SILICA SHELL NANOPARTICLES AND SYNTHETIC METHOD THEREOF

摘要

Platinum (Pt) nanodots assembly (m-Pt) core-silica shell nanosystems {m-Pt@SiO_2 NPs (spherical nanoparticles) and m-Pt@SiO_2 NChs (nanochains)} are synthesized by a reverse microemulsion (water-in-oil) based method. The morphologies and structural properties of the core-shell nanoparticles are controlled and characterized by means of the transmission electron microscopy (TEM) and the scanning electron microscopy (SEM). Platinum/gold nanodots assembly (m-Au/Pt) core-silica shell nanosystems (m-Au/Pt@SiO_2NPs) are synthesized. Hybridized multiple metal core-silica shell systems are formed by reduction of HAuCl_4 and K_2PtCl_4, dynamically controlled by a surfactant Brij35, and condensation of TEOS in the reverse micelle. The nanoparticles and the nanochains of the present invention can be applied as an effective catalyst or an energy transferring material.