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Issue 3, 2019
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Two-dimensional arrays self-assembled via interference of concentration modulation waves in drying solutions

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Abstract

The self-assembly of patterned nanostructures in solution-processed thin films with multiphase block-copolymers is successful. Generation of small and well-defined regular structures directly from single-phase polymer films is challenging. Here, a 2-dimensional (2D) patterned array of single-phase polymers was self-assembled by a solution process. One-dimensional spinodal precipitation with a characteristic wavelength was achieved along a pinned contact line of the drying solution to form a one-dimensional periodic structure (1DPS) via geometry and concentration confinement. The latter was uncovered from the liquid by sequential depinning and repinning of the contact line. A new 1DPS with an inherited phase re-emerged and triggered depinning and repinning. The process was self-repeated and a 2D array was formed with a tuneable lattice type and parameters, which was governed by the interference of two concentration-modulated waves.

Graphical abstract: Two-dimensional arrays self-assembled via interference of concentration modulation waves in drying solutions

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Publication details

The article was received on 08 Oct 2018, accepted on 15 Jan 2019 and first published on 14 Feb 2019


Article type: Communication
DOI: 10.1039/C8MH01264D
Mater. Horiz., 2019,6, 507-514

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    Two-dimensional arrays self-assembled via interference of concentration modulation waves in drying solutions

    S. Li, Y. T. Chun, J. Li, P. Shrestha, H. Ahn, D. Ahn, J. I. Sohn, W. Hong, B. Kim, Y. Deng and D. Chu, Mater. Horiz., 2019, 6, 507
    DOI: 10.1039/C8MH01264D

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