| 초록 |
In this study, we propose a novel strategy to prepare well-aligned silica hollow shell monolayers based on the electrostatic interaction 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 the surfactant, and polyvinylpyrrolidone (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 nanosphere as a template and TEOS as a silica precursor by the sol-gel method. The prepared PS/SiO2 core-shell spheres 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 sphere monolayers were obtained. After calcination, uniform and monolayered hollow silica arrays were be achieved. |
