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Hierarchically organized honeycomb films through block copolymer directed self-assembly in “breath figure” templating and soft microwave-triggered annealing

Abstract

Hierarchically organized polymer films are produced with a high level of order from the combination of block copolymer nanophase segregation, “breath figure” methodology and microwave irradiation. A block copolymer based on poly(methyl methacrylate) and poly(n-butylacrylate) featuring cylindrical nanopatterns is involved in the “breath figure” process to create a microporous honeycomb structure. Microwave-triggered annealing was used to finely enhance the degree of ordering of the nano-segregation without the destruction of the honeycomb microstructure, which is not possible by classical thermal or solvent annealing. Ellipsometry, optical and atomic force microscopy are used to study three key parameters; the substrate nature, the film thickness and the microwave irradiation power. Silicon wafer is the substrate of choice to efficiently act as the heating transfer element and 60 seconds at 10 watts are enough to nicely order 1 μm thick copolymer films. These conditions are eventually applied on hierarchically organized polymer film to obtain a hexagonal array of 100 nm deep holes within a matrix of perpendicularly aligned nano-cylinder.

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Publication details

The article was received on 18 Jan 2018, accepted on 27 Apr 2018 and first published on 27 Apr 2018


Article type: Paper
DOI: 10.1039/C8SM00137E
Citation: Soft Matter, 2018, Accepted Manuscript
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    Hierarchically organized honeycomb films through block copolymer directed self-assembly in “breath figure” templating and soft microwave-triggered annealing

    N. Benoot, P. Marcasuza, L. Pessoni, S. Chavised, S. reynaud, A. Bousquet and L. Billon, Soft Matter, 2018, Accepted Manuscript , DOI: 10.1039/C8SM00137E

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