Universal Method for Creating Hierarchical Wrinkles on Thin-Film Surfaces

Woo Bin Jung, Kyeong Min Cho, Won Kyu Lee, Teri W Odom, Hee Tae Jung

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

One of the most interesting topics in physical science and materials science is the creation of complex wrinkled structures on thin-film surfaces because of their several advantages of high surface area, localized strain, and stress tolerance. In this study, a significant step was taken toward solving limitations imposed by the fabrication of previous artificial wrinkles. A universal method for preparing hierarchical three-dimensional wrinkle structures of thin films on a multiple scale (e.g., nanometers to micrometers) by sequential wrinkling with different skin layers was developed. Notably, this method was not limited to specific materials, and it was applicable to fabricating hierarchical wrinkles on all of the thin-film surfaces tested thus far, including those of metals, two-dimensional and one-dimensional materials, and polymers. The hierarchical wrinkles with multiscale structures were prepared by sequential wrinkling, in which a sacrificial layer was used as the additional skin layer between sequences. For example, a hierarchical MoS2 wrinkle exhibited highly enhanced catalytic behavior because of the superaerophobicity and effective surface area, which are related to topological effects. As the developed method can be adopted to a majority of thin films, it is thought to be a universal method for enhancing the physical properties of various materials.

Original languageEnglish
Pages (from-to)1347-1355
Number of pages9
JournalACS Applied Materials and Interfaces
Volume10
Issue number1
DOIs
Publication statusPublished - Jan 10 2018

Keywords

  • hierarchical wrinkles
  • hydrogen evolution reaction
  • molybdenum disulfide
  • transition metal dichalcogenides
  • wrinkle

ASJC Scopus subject areas

  • Materials Science(all)

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