Easy orientation of diblock copolymers on self-assembled monolayers using UV irradiation

Details Easy orientation of diblock copolymers on self-assembled monolayers using UV irradiation Easy orientation of diblock copolymers on self-assembled monolayers using UV irradiation

2009-02-15

arxiv.org/abs/0902.2575v1

Physics

Condensed Matter

Soft Condensed Matter

3 figures, 1 table

Scientific paper

A simple method based on UV/ozone treatment is proposed to control the surface energy of dense grafted silane layers for orientating block copolymer mesophases. Our method allows one to tune the surface energy down to a fraction of a mN/m. We show that related to the surface, perpendicular orientation of a lamellar phase of a PS-PMMA diblock copolymer (neutral surface) is obtained for a critical surface energy of 23.9-25.7 mN/m. Perpendicular cylinders are obtained for 24.6 mN/m and parallel cylinders for 26.8 mN/m.

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