The increase in the orientation of the nanodomains in block copolymer thin films upon the addition of homopolymer was studied. Scanning electron microscopy (SEM) images of thin films of two different polystyrene-block-poly(methyl methaacrylate) copolymers (PS-b-PMMA) were shown. It was found that increasing the film thickness causes the orientation of the microdomains to deteriorate. Field-emission SEM (FE-SEM) images show a hexagonal packing of the cylindrical microdomains at the surface of the film, even for a 300 nm thick film.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering