Rapid Assembly of Nanolines with Precisely Controlled Spacing from Binary Blends of Block Copolymers

• DOI: 10.1021/ma202064t
• Publication Date: 2011-11-21T14:57:58Z
• Authors: Xiaojiang Zhang; Jeffrey N. Murphy; Nathanael L. Y. Wu; Kenneth D. Harris; Jillian M. Buriak
• Keywords: Polystyrene

Thin films cast from binary blends of structurally homologous polystyrene-block-poly(2-vinylpyridine) polymers were used to obtain horizontal arrays linear nanostructures which visualized by metallizing the poly(2-vinylpyridine) blocks with a tetrachloroplatinate salt. By varying blend compositions block copolymers, fine control over periodicity lines was realized ∼25 55 nm using set just 4 copolymers. For neat copolymers whose equilibrium structures are not cylinders, blending enabled cylindrical form. The ordering in various studied measurements defect density, and it found that many cases blended produced patterns lower density than formed single component Annealing polymer carried out solvothermal microwave annealing technique able rapidly produce few-defect films. Here is adapted use household oven (cost < $100) induce self-assembly under 2 min, enabling broad accessibility.