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Issue 23, 2018
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Hierarchically organized honeycomb films through block copolymer directed self-assembly in “breath figure” templating and soft microwave-triggered annealing

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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. These films are submitted to microwave annealing to 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. The 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 the 1 μm thick copolymer films. These conditions are eventually applied on hierarchically organized polymer films to obtain a hexagonal array of 100 nm deep holes within a matrix of perpendicularly aligned nano-cylinders.

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

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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, 2018,14, 4874-4880
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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. Marcasuzaa, L. Pessoni, S. Chasvised, S. Reynaud, A. Bousquet and L. Billon, Soft Matter, 2018, 14, 4874
    DOI: 10.1039/C8SM00137E

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