Journal
ACS NANO
Volume 10, Issue 4, Pages 4055-4061Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b06728
Keywords
3-miktoarm star terpolymer; directed self-assembly; hierarchical lamellar pattern; Archimedean tiling; topographical substrate
Categories
Funding
- Arkema
- Region Aquitaine
- Equipex ELORPrintTec [ANR-10-EQPX-28-01]
- LabEx [AMADEUS ANR-10-LABEX-0042-AMADEUS]
- French state Initiative d'Excellence IdEx [ANR-10-IDEX-003-02]
- LCPO-Arkema INDUSTRIAL CHAIR HOMERIC [ANR-13-CHIN-0002-01]
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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 silacydobutane)-arm-polystyrene-armpoly(D,L-lactide acid)) (PDMSB-arm-PS-arm-PLA, noted hereafter 3 mu-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.
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