@article{86b9e7d250a74aaf82b72c8868d8c0bd,
title = "Strain-Dependent Nanowrinkle Confinement of Block Copolymers",
abstract = "This paper describes an all-soft, templated assembly of block copolymers (BCPs) with programmable alignment. Using polymeric nanowrinkles as a confining scaffold, poly(styrene)-block-poly(dimethylsiloxane) (PS-b-PDMS) BCPs were assembled to be parallel or perpendicular to the wrinkle orientation by manipulating the substrate strain. Self-consistent field theory modeling revealed that wrinkle curvature and surface affinity govern the BCP structural formation. Furthermore, control of BCP alignment was demonstrated for complex wrinkle geometries, various copolymer molecular weights, and functional wrinkle skin layers. This integration of BCP patterning with flexible 3D architectures offers a promising nanolithography approach for next-generation soft electronics.",
keywords = "block copolymers, confinement, directed self-assembly, self-consistent field theory, wrinkles",
author = "Lee, {Young Ah Lucy} and Victor Pryamitsyn and Dongjoon Rhee and {De La Cruz}, {Monica Olvera} and Odom, {Teri W.}",
note = "Funding Information: This work was supported by the Office of Naval Research (ONR N00014-17-1-2482), the National Science Foundation (NSF CMMI-1462633, CMMI-1848613), and the National Science Foundation Graduate Research Fellowship (NSF DGE 1842765). V.P. was supported by Award 70NANB14H012 from the U.S. Department of Commerce, National Institute of Standards and Technology, as part of the Center for Hierarchical Materials Design (CHiMaD). This work made use of the Northwestern University Micro/Nano Fabrication Facility (NUFAB) and the Northwestern University Atomic and Nanoscale Characterization Experimental Center (NUANCE), which have received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the Materials Research Science and Engineering Center (MRSEC) program (NSF DMR-1720139) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois. The computational work was performed on the Quest high performance computing facility at Northwestern University and supported by the Sherman Fairchild Foundation. The authors would like to thank Wei Li for helpful discussions, and Y.-A.L.L. gratefully acknowledges support from the Ryan Fellowship and the IIN at Northwestern University. Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",
year = "2020",
month = feb,
day = "12",
doi = "10.1021/acs.nanolett.9b05189",
language = "English (US)",
volume = "20",
pages = "1433--1439",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "2",
}