from Aldrich Company was dissolved in 100 ml ethanol solution, and 1 ml TEOS (tetraethoxysilane) and 0.4 g HCl (38 wt.%) were added to the solution, then 0.15 ml
MPTMS (3-mercaptopropyltrimethoxysilane) and 1 ml H2O2(30 wt.%) were added and kept stirring at room temperature for 20 h.