The effects of additives of poly(methyl methacrylate) (PMMA) and HAuCl4 on the morphologies of hybrid titania films formed via co-assembly of polystyrene-block-poly(ethylene oxide) (PS-b-PEO) copolymers, titania sol-gel precursor in a selective solvent were investigated. The results show that addition of PMMA or HAuCl4 has an important influence on the morphologies of hybrid titania films. Addition of PMMA or HAuCl4 can induce the morphology transition of the PS-b-PEO/titania sol-gel mixture from spherical micelles to vesicles. Therefore, the morphologies of the hybrid films formed on silicon substrate surfaces by spin-coating can be controlled by the addition of homopolymer (PMMA) or inorganic precursor (HAuCl4) into the PS-b-PEO/titania sol-gel mixtures, allowing access to nanoparticles or nanoporous films. After removing the polymer matrix, nanoparticle aggregates or nanobowl-like structures are left behind on the substrate surfaces.
Bibliographical noteFunding Information:
This work was funded by the National Natural Science Foundation of China (20674030), Shandong Natural Science Foundation (Y2006B02) and the Doctorial Foundation of University of Jinan (B0541). This work was supported by Seoul Research and Business Development Program (10816).
- Block copolymer
- Titania film