| 초록 |
Nanosystems using platinum (Pt) nanodots assembly (multi-Pt nanoparticles, m-Pt) as the core and silica (SiO2) shells were successfully synthesized as m-Pt@SiO2 spherical nanoparticles (NPs) and m-Pt@SiO2 nanochains (NChs) by a reverse microemulsion (water-in-oil) based method. The kinetically controlled reduction of K2PtCl4 by the Brij35 surfactant within reverse micelles, followed by condensation of tetraethyl orthosilicate (TEOS), led to the formation of multi-Pt nanodot core-slica shell systems. The reduction kinetics for the growth of core-shell systems were compared in both the presence of reducing agents and in the absence of supplementary agents, as well as the variation of water-to-surfactant ratio. To assemble Pt nanoparticles within in one-dimensional silica matrix for m-Pt@SiO2 NChs, the pH of the reaction media was systematically changed. |
