Pulse electrophoresis deposition of Ag@SiO2 core-shell nanoparticles on FTO substrate

Ag@SiO2 cure shell nanoparticles (NPs) were synthesized by chemical reduction followed by the modified Stober method at room temperature and deposited on fluorine doped tin oxide (PTO) substrate using the pulse electrophoresis deposition (PED) method. The surface plasmon (SP) band of Ag NPs was red-shifted after silica coating. The Ag@SiO2 core-shell NPs (50-65 urn) was composed of 25-35 urn Ag NPs core and SiO2 shell thickness was controlled from 12 to 30 nm by controlling TEOS amount. PED was carried out in galvanostatic mode for uniform deposition of Ag@SiO2 core-shell NPs. The number of Ag@SiO2 core-shell NPs deposited on the substrate was increased with prolonged deposition time. (C) 2013 Elsevier By. All rights reserved.