Issue 37, 2011

Controlled evaporative self-assembly of hierarchically structured bottlebrush block copolymer with nanochannels

Abstract

The toluene solution of a bottlebrush block copolymer, polystyrene–polylactide (PS–PLA), was confined in a cylinder-on-flat geometry, from which the consecutive “stick-slip” motion of the three-phase contact line of the PS–PLA solution was effectively regulated as toluene evaporated, thereby yielding gradient stripes at the microscopic scale. Subsequent selective solvent vapor annealing led to the formation of hierarchically structured PS–PLA in which the lamellar nanodomains of PS–PLA normal to the substrate were obtained within the microscopic stripes. After the selective removal of the PLA block by enzymatic degradation, nanochannels were yielded within the stripes. This facile approach of combining the controlled evaporative self-assembly with subsequent solvent vapor annealing opens up a new avenue to rationally organize and engineer self-assembling building blocks into functional materials and devices in a simple, cost-effective and controllable manner.

Graphical abstract: Controlled evaporative self-assembly of hierarchically structured bottlebrush block copolymer with nanochannels

Supplementary files

Article information

Article type
Paper
Submitted
07 Mar 2011
Accepted
06 Apr 2011
First published
14 May 2011

J. Mater. Chem., 2011,21, 14248-14253

Controlled evaporative self-assembly of hierarchically structured bottlebrush block copolymer with nanochannels

W. Han, M. Byun, L. Zhao, J. Rzayev and Z. Lin, J. Mater. Chem., 2011, 21, 14248 DOI: 10.1039/C1JM10978B

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