@article{53748ed88b414710addf27df1fe403be,
title = "Area-Specific, Hierarchical Nanowrinkling of Two-Dimensional Materials",
abstract = "This paper describes an approach to generate hierarchical wrinkles in two-dimensional (2D) electronic materials with spatial control over adjacent wavelengths. A rigid fluoropolymer mold was used to pattern a sacrificial polymer skin layer on monolayer graphene, molybdenum disulfide, and hexagonal boron nitride on prestrained thermoplastic sheets. Strain relief and removal of the polymer layer resulted in 2D-material wrinkles whose wavelengths scaled linearly with the local skin thickness. A second generation of wrinkles could be created on top of the first generation by applying a subsequent cycle of polymer skin coating, strain relief, and polymer removal. This area-specific hierarchical wrinkling is general and will facilitate the engineering of the local properties of various 2D materials and their heterostructures.",
keywords = "hierarchical structures, multiscale patterning, nanowrinkles, soft lithography, two-dimensional materials",
author = "Dongjoon Rhee and Lee, {Young Ah Lucy} and Odom, {Teri W.}",
note = "Funding Information: This work was supported by the National Science Foundation (CMMI-1848613), the Office of Naval Research (ONR N00014-17-1-2482), and the Vannevar Bush Faculty Fellowship from the Department of Defense (DOD N00014-17-1-3023). Samples were fabricated and characterized using the Northwestern University Micro/Nano Fabrication Facility (NUFAB), Electron Probe Instrumentation Center (EPIC), Scanned Probe Imaging and Development (SPID) facility, and Keck Interdisciplinary Surface Science facility (Keck-II), which have received support from the SHyNE Resource (NSF ECCS-2025633), the International Institute for Nanotechnology (IIN) at Northwestern University, and Northwestern{\textquoteright}s MRSEC program (NSF DMR-1720139). D.R. gratefully acknowledges a scholarship from Jeongsong Cultural Foundation (Republic of Korea). Y.-A.L.L. appreciates support from the Ryan Fellowship from the IIN. Publisher Copyright: {\textcopyright} 2023 American Chemical Society. All rights reserved.",
year = "2023",
month = apr,
day = "11",
doi = "10.1021/acsnano.3c00033",
language = "English (US)",
volume = "17",
pages = "6781--6788",
journal = "ACS nano",
issn = "1936-0851",
publisher = "American Chemical Society",
number = "7",
}