화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.26, No.4, 374-379, April, 2018
DOI10.1007/s13233-018-6042-y  Export Citation
Effect of the Orientation and Bending Stiffness of Nanopatterned Films on Wrinkling
Dokyeong Kwon1, 2, Do Min Kim3, Soo Min Choi3, 4, Hyo Seon Suh5, Yoon Young Kim3, Hyunsik Yoon6, †, and Kookheon Char1, 2, †
  • 1The National Creative Research Initiative Center for Intelligent Hybrids, Seoul National University, Seoul 08826, Korea
  • 2The World Class University Program of Chemical Convergence for Energy and Environment, School of Chemical and Biological Engineering, College of Engineering, Seoul National University, Seoul 08826, Korea
  • 3WCU Multiscale Design Division, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, Korea
  • 4Institute of Advanced Machines and Design, Seoul National University, Seoul 08826, Korea
  • 5Institute for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States, USA
  • 6Department of Chemical and Biomolecular Engineering, Seoul National University of Science & Technology, Seoul 01811, Korea
E-mail:,
The production of hierarchical structures has an important role for applications such as superhydrophobic surfaces, structural colors, and energy devices. Microscale wrinkling of surfaces decorated by nanoscale patterns can be one of the most efficient methods to realize hierarchical structures. Here, we investigate wrinkling of films embedding anisotropic nanopatterned surfaces prepared by nanoimprint lithography. After transferring nanoimprinted polystyrene thin films onto stretched elastomeric substrates, we achieve microscale wrinkles by releasing the strain. We examine the anisotropic wrinkles of well-defined nanolines with various widths, heights, and spacing ratios and propose a model that considers only bending stiffness of the patterned film. We compare the approach with a model that considers inplane stiffness and confirm that our scheme matches well with that of nanopatterns with thin residual layers.
Keywords:wrinkling;polymer;hierarchical structure;elastomer;bending stiffness
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