Archimedean Tilings and Hierarchical Lamellar Morphology Formed by Semicrystalline Miktoarm Star Terpolymer Thin Films
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- 作者：Karim Aissou ; Wonsang Kwon ; Muhammad Mumtaz ; Ségolène Antoine ; Mireille Maret ; Giuseppe Portale ; Guillaume Fleury ; Georges Hadziioannou
- 刊名：ACS Nano
- 出版年：2016
- 出版时间：April 26, 2016
- 年：2016
- 卷：10
- 期：4
- 页码：4055-4061
- 全文大小：575K
- 年卷期：0
- ISSN：1936-086X
文摘
3-Miktoarm star terpolymer architecture provides a window of opportunity in the design of complex “three-colored” patterns at the nanometer scale. Here, the directed self-assembly (DSA) of 3-miktoarm star terpolymer (poly(1,1-dimethyl silacyclobutane)-arm-polystyrene-arm-poly(d,l-lactide acid)) (PDMSB-arm-PS-arm-PLA, noted hereafter 3 μ-DSL) into a hierarchical lamellar morphology is described. Excellent orientational order has been achieved by templating the asymmetric hierarchical lamellar morphology with topographical substrates. Increasing the PLA volume fraction leads to the formation of a hexagonal [6.6.6] Archimedean tiling which coexists with a metastable square symmetry [4.8.8] tiling stabilized by the step between terraces. Stability of the [6.6.6] tiling over the [4.8.8] one is also demonstrated with GISAXS measurements.