| 초록 |
In the present study, we propose a novel strategy to prepare well-aligned hollow silica monolayers employing the electrostatic interactions between charged nanospheres and substrates. Positively charged polystyrene (PS) nanospheres were first synthesized using styrene as a monomer, 2,2-azobis-(isobutyramidine) dihydrochloride (AIBA) as an initiator as well as poly(vinyl pyrrolidone) (PVP) as a stabilizer and a cosurfactant by dispersion polymerization. PS/SiO2 core/shell nanospheres with negatively charged surface were then prepared using positively charged PS nanospheres as templates and tetraethyl orthosilicate (TEOS) as a silica precursor by the sol-gel method. The prepared PS/SiO2 core/shell nanospheres were deposited onto Si wafer substrates with different surface charges by spin coating. On the substrate with positively charged surface, well-aligned PS/SiO2 core/shell nanosphere monolayers were obtained. After calcination, uniform and monolayered hollow silica arrays were achieved. |
