Directed assembly of non-equilibrium ABA triblock copolymer morphologies on nanopatterned substrates

ACS Nano
Shengxiang JiPaul F Nealey

Abstract

The majority of past work on directed assembly of block copolymers on chemically nanopatterned surfaces (or chemical patterns) has focused on AB diblock copolymers, and the resulting morphologies have generally corresponded to equilibrium states. Here we report a study on directed assembly of ABA triblock copolymers. Directed assembly of thin films of symmetric poly(methyl methacrylate-b-styrene-b-methyl methacrylate) (PMMA-b-PS-b-PMMA) triblock copolymers is shown to be capable of achieving a high degree of perfection, registration, and accuracy on striped patterns having periods, L(s), commensurate with the bulk period of the copolymer, L(o). When L(s) is incommensurate with L(o), the triblock copolymer domains can reach dimensions up to 55% larger or 13% smaller than L(o). The range over which triblock copolymers tolerate departures from a commensurate L(s) is significantly larger than that accessible with the corresponding diblock copolymer material on analogous directed assembly systems. The assembly kinetics of the triblock copolymer is approximately 3 orders of magnitude slower than observed in the diblock system. Theoretically informed simulations are used to interpret our experimental observations; a thermodynamic anal...Continue Reading

References

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Jan 1, 2010·ACS Nano·Shengxiang JiPaul F Nealey
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Citations

May 6, 2015·Annual Review of Chemical and Biomolecular Engineering·Weihua Li, Marcus Müller
Jun 1, 2015·The Journal of Chemical Physics·E N GovorunA V Chertovich
May 26, 2017·ACS Applied Materials & Interfaces·Daniel F SundayR Joseph Kline
Aug 4, 2020·Physical Chemistry Chemical Physics : PCCP·Xianwen Ji, Weihua Li
Jan 23, 2017·The Journal of Chemical Physics·E N Govorun, A V Chertovich
Dec 10, 2015·Physical Review Letters·Marcus Müller, Jiuzhou Tang
Feb 20, 2021·ACS Applied Materials & Interfaces·Ling-Ying ShiCaroline A Ross
May 12, 2020·Journal of the American Chemical Society·Zhengyuan ShenJ Ilja Siepmann
Dec 29, 2018·ACS Applied Materials & Interfaces·Laura EvangelioFrancesc Pérez-Murano
Feb 7, 2020·ACS Applied Materials & Interfaces·Hyun Su YunHong Kyoon Choi
Apr 28, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Tao YangWeihua Li
Jul 24, 2018·ACS Applied Materials & Interfaces·Daniel A Olaya-MuñozJuan P Hernández-Ortiz

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