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Publication Citation: Block Copolymer Ordering With a Spatiotemporally Inhomogeneous Mobility

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Author(s): August W. Bosse; Jack F. Douglas; Brian Berry; Ronald L. Jones; Alamgir Karim;
Title: Block Copolymer Ordering With a Spatiotemporally Inhomogeneous Mobility
Published: November 20, 2007
Abstract: Motivated by recent measurements of zone annealing in block copolymer films at low temperatures, we implement a spatiotemporal mobility gradient with intrinsic variations associated with dynamic heterogeneities in the saddle point relaxation of a diblock copolymer self-consistent field theory. This model of the dynamics provides insight into the nature of the ordering front observed in low-temperature zone annealing experiments. Specifically, we demonstrate that a spatiotemporallyinhomogeneous mobility can be successfully implemented as a means to control microdomain ordering in block copolymer systems. Furthermore, the simulations suggest that glass physics can play an important role in the ordering of block copolymer microdomains.
Citation: Physical Review Letters
Volume: 99
Pages: 4 pp.
Keywords: block copolymers,defects,glass transition,mobility,ordering,SCFT,simulation,zone annealing,zone refinement
Research Areas: Polymers, Block copolymer lithography
PDF version: PDF Document Click here to retrieve PDF version of paper (2MB)