Preparation of Nanowells on a PS-b-PMMA Copolymer Thin Film by CO2 Treatment
✍ Scribed by Kentaro Taki; Yusuke Waratani; Masahiro Ohshima
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 648 KB
- Volume
- 293
- Category
- Article
- ISSN
- 1438-7492
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Ordered nanowells with diameters of ca. 40 nm and depth of 1–2 nm were prepared on a poly(methyl methacrylate) (PMMA) spherical domain, which was exposed on the polystyrene‐block‐poly(methyl methacrylate) (PS‐b‐PMMA) copolymer thin film. The PS‐b‐PMMA film formed spherical PMMA domains after the film was annealed above the order–disorder transition temperature. CO~2~ was dissolved into the PS‐b‐PMMA thin film at 8.6 MPa and at a temperature of 20 °C. The release of CO~2~‐pressure at the same temperature created the nanowell on the PMMA domain. The temperature and pressure to create nanowells in the PMMA domain affected the possibility of nanowell's formation.
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