Shell structure as solution to a free boundary problem from block copolymer morphology

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August 2009, 24(3): 979-1003. doi: 10.3934/dcds.2009.24.979

Shell structure as solution to a free boundary problem from block copolymer morphology

1.	Department of Mathematics, The George Washington University, 2115 G Street, Washington, DC 20052

Received November 2007 Revised March 2008 Published April 2009

Abstract
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A shell like structure is sought as a solution of a free boundary problem derived from the Ohta-Kawasaki theory of diblock copolymers. The boundary of the shell satisfies an equation that involves its mean curvature and the location of the entire shell. A variant of Lyapunov-Schmidt reduction process is performed that rigorously reduces the free boundary problem to a finite dimensional problem. The finite dimensional problem is solved numerically. The problem has two parameters: $a$ and $\gamma$. When $a$ is small, there are a lower bound and a sequence such that if $\gamma$ is greater than the lower bound and stays away from the sequence, there is a shell like solution.

Keywords: diblock copolymer, shell pattern..

Mathematics Subject Classification: 35R35, 82B24, 82D6.

Citation: Xiaofeng Ren. Shell structure as solution to a free boundary problem from block copolymer morphology. Discrete & Continuous Dynamical Systems - A, 2009, 24 (3) : 979-1003. doi: 10.3934/dcds.2009.24.979

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