A simple route to highly oriented and ordered nanoporous block copolymer templates
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- A simple route to highly oriented and ordered nanoporous block copolymer templates
- Park, Soojin; Wang, Jia-Yu; Kim, Bokyung; Xu, Ji; Russell, Thomas P.
- Block copolymer; Gold evaporation; Perpendicular orientation; PS-b-P4VP; Reactive ion etching; Surface reconstruction
- Issue Date
- AMER CHEMICAL SOC
- ACS NANO, v.2, no.4, pp.766 - 772
- Controlling the orientation and lateral ordering of the block copolymer microdomains is essential to their use as templates and scaffolds for the fabrication of nanostructured materials. In addition, a process must be robust, simple to implement, and rapid, and should not introduce disruptive processing steps that would impede their use. Here, we describe thin films of poly(styrene-b-4-vinylpyridine) (PS-b-P4VP) diblock copolymers, spin-coated from mixed solvents that show highly oriented, cylindrical microdomains with a high degree of order on a wide range of substrates, including silicon oxide, polystyrene, germanium, polyimide, and poly(butylene terephthalate). In addition, the preferential solvation of the P4VP block with an alcohol caused a surface reconstruction that resulted in the formation of a nanoporous film upon drying. The evaporation of gold onto the reconstructed films produced thermally stable and reactive ion etching resistant films.
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