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Nanoscale Archimedean Tilings Formed by 3‐Miktoarm Star Terpolymer Thin Films

Abstract : 3-Miktoarm star terpolymer architecture (3 mu-ABC), consisting of three dissimilar polymer chains, A, B, and C connected at a junction point, provides a unique opportunity in the design of complex nanoscale patterns such as Archimedean tilings that are not accessible from linear ABC terpolymers. In this work, the synthesis and the self-assembly of 3-miktoarm star terpolymers, namely, polystyrene-arm-poly(2-vinylpyridine)-arm-polyisoprene (3 mu-SPI) into Archimedean tiling patterns is described. Several 3 mu-SPI terpolymers are produced via a mid-functional PS-b-P2VP, synthesized by sequential anionic polymerization, using a 1,1-diphenylethylene bearing a tert-butyldimethylsilyl-protected hydroxyl functionality as a core molecule. PI arms with different sizes are then linked to the deprotected hydroxyl function of the core molecule via a Steglich esterification. Solvent-annealed 3 mu-SPI thin films exhibit nanoscale prisms arranged into a (4.6.12) Archimedean tiling pattern. Depending on the size of the low etch-resistant PI arm and the solvent selected to promote the self-assembly of 3 mu-SPI thin films, the voided columns occupy the square or decagonal sites of the (4.6.12) pattern. The use of this (4.6.12) tiling produced for the first time from self-assembled 3 mu-ABC thin films can be a promising route to build 2D photonic crystals having complete photonic band gaps, where the light propagation is completely prohibited
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Contributor : Philippe Falque <>
Submitted on : Wednesday, July 31, 2019 - 8:44:54 AM
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Ségolène Antoine, Karim Aissou, Muhammad Mumtaz, Gilles Pécastaings, Thierry Buffeteau, et al.. Nanoscale Archimedean Tilings Formed by 3‐Miktoarm Star Terpolymer Thin Films. Macromolecular Rapid Communications, Wiley-VCH Verlag, 2019, 40 (7), pp.1800860. ⟨10.1002/marc.201800860⟩. ⟨hal-02199637⟩



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