A simple method to prepare highly ordered PS-b-P4VP block copolymer template

A control strategy for tuning the film morphology of asymmetric polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP) block copolymers (BCPs) is reported. After preparation of the film by spin-coating method, the as-cast films were annealed in different solvent vapor. It is found that chloroform is a wonderful solvent for forming PS-b-P4VP regular pattern. Otherwise, with changing the concentration of PS-b-P4VP, cylindrical or parallel nanostructures could be attained. The PS-b-P4VP films with cylindrical structure are used as template to deposit FePt nanoparticles into the pores. Nanoparticles reaching the bottom of the holes form a disordered magnetic array.

Chloroform is a wonderful solvent for forming PS-b-P4VP regular pattern. With changing the concentration of PS-b-P4VP, cylindrical or parallel nanostructures could be attained.Figure optionsDownload as PowerPoint slideResearch highlights▶ Chloroform is a wonderful solvent for forming PS-b-P4VP regular pattern. ▶ By controlling the concentration of PS-b-P4VP, cylindrical or parallel nanostructures could be attained. ▶ Cylindrical structure is used as template to deposit FePt nanoparticles into the pores. At present, although the result is not competitive to other systems, but this method is still a promising strategy to implement the future bit-pattern magnetic-storage media.