학술논문

Optimizing Topographical Templates for Directed Self-Assemblyof Block Copolymers via Inverse Design Simulations.
Document Type
Article
Source
Nano Letters. Jan2014, Vol. 14 Issue 1, p318-325. 8p.
Subject
*MOLECULAR self-assembly
*BLOCK copolymers
*TOPOLOGY
*SIMULATION methods & models
*MATHEMATICAL optimization
Language
ISSN
1530-6984
Abstract
An inverse design algorithm has beendeveloped that predicts thenecessary topographical template needed to direct the self-assemblyof a diblock copolymer to produce a given complex target structure.The approach is optimized by varying the number of topographical posts,post size, and block copolymer volume fraction to yield a templatesolution that generates the target structure in a reproducible manner.The inverse algorithm is implemented computationally to predict postarrangements that will template two different target structures andthe predicted templates are tested experimentally with a polydimethylsiloxane-b-polystyrene block copolymer. Simulated and experimentalresults show overall very good agreement despite the complexity ofthe patterns. The templates determined from the model can be usedin developing simpler design rules for block copolymer directed self-assembly. [ABSTRACT FROM AUTHOR]