IMI Interdisciplinary Mathematics InstituteCollege of Arts and Sciences

Ordering Control of Self-Assembled Block Copolymers in Thin Films

  • March 12, 2012
  • 3:30 p.m.
  • LeConte 312

Abstract

Block copolymers are a class of self-assembling soft materials comprising at least two covalently-linked polymer chains, where thermodynamic immiscibility between these blocks gives rise to a rich array of ordered nanophase-separated nanostructures with periodicity on the scale of 10-100 nm. Controlling the orientation of these nanophase separated nanostructures is vital in many applications such as lithography, membranes, data storage, and so forth. Typical strategies involve the use of external fields or patterned substrates. This talk will cover two different solvent evaporation-induced ordering techniques to achieve kinetically controlled, highly ordered thin films of block copolymers on centimeter-scale substrates. The powerful control of these techniques is manifested by diverse morphologies and exceptional tolerance on versatility of block copolymer chemistry as well as allowance of a wide spectrum of substrates. Self-consistent field theory is used to model some of morphology.

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