title: The formation and control of highly crumpled metal surfaces on a photocurable viscous liquid.
abstract: Folds, highly deformed structures, have received extensive attention for their nonlinear responses due to a large strain on soft matters. To investigate the folding phenomena, here, we exploit residual tensile stress during metal deposition, which is large enough to compress a thin film coating and introduce a photocurable viscous fluid to decrease the resistance of the substrate against compressive stress. The system has the advantages of the abilities for freezing the highly deformed surfaces by post-UV exposure to the UV-crosslinkable substrate and manipulating the substrate effect by controlling the thickness of the substrate. We theoretically investigated the dependence on the substrate thickness using scaling analysis and demonstrated self-generated ladder and flower-like graphoepitaxial structures originated from the thickness design of the viscous substrate.
authors.affiliation: School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Korea. wblee@snu.ac.kr khchar@plaza.snu.ac.kr.
authors.forename: Jung Gun
authors.initials: JG
authors.lastname: Bae
authors.forename: Seung Hyun
authors.initials: SH
authors.lastname: Sung
authors.forename: Hyemin
authors.initials: H
authors.lastname: Lee
authors.forename: Kookheon
authors.initials: K
authors.lastname: Char
authors.forename: Hyunsik
authors.initials: H
authors.lastname: Yoon
authors.forename: Won Bo
authors.initials: WB
authors.lastname: Lee