Preparation and Optical Characterization of Mesoporous Silica Films with Different Pore Sizes

Bulletin of the Korean chemical society

Jae Young Bae¹  Byeong-Soo Bae¹  Suk-Ho Choi¹ 

关键词: Mesoporous silica films;    Block copolymers;    Photoluminescence;    Quantum confinement effect;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Mesoporous silica films with three different pore sizes were prepared by using cationic surfactant, non-ionic surfactant, or triblock copolymer as structure directing agents with tetramethylorthosilicate as silica source in order to control the pore size and wall thickness. They were synthesized by an evaporation-induced selfassembly process and spin-coated on Si wafer. Mesoporous silica films with three different pore sizes of 2.9, 4.6, and 6.6 nm and wall thickness ranging from ~1 to ~3 nm were prepared by using three different surfactants. These materials were optically transparent mesoporous silica films and crack free when thickness was less than 1 レm. The photoluminescence spectra found in the visible range were peaked at higher energy for smaller pore and thinner wall sized materials, consistent with the quantum confinement effect within the nano-sized walls of the silica pores.

【 授权许可】

Unknown