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Universal Method for Creating Hierarchical Wrinkles on Thin-Film Surfaces
Woo-Bin Jung1,2, Kyeong Min Cho1, Won-Kyu Lee3
1National Laboratory for Organic Optoelectronic Materials, Department of Chemical and Biomolecular Engineering (BK-21 plus), Korea Advanced Institute of Science and Technology , Daejeon 305-701, South Korea.
ACS Applied Materials & Interfaces
|November 29, 2017
Summary
Scientists developed a universal method to create complex, multiscale wrinkled surfaces on various thin films. This technique enhances material properties by increasing surface area and improving catalytic behavior.
Area of Science:
- Physical Science
- Materials Science
Background:
- Wrinkled thin-film surfaces offer advantages like high surface area and stress tolerance.
- Previous methods for fabricating artificial wrinkles faced limitations.
Purpose of the Study:
- To develop a universal method for creating hierarchical, three-dimensional wrinkle structures on thin films across multiple scales.
- To overcome limitations of existing wrinkle fabrication techniques.
Main Methods:
- Sequential wrinkling using different skin layers.
- Incorporation of a sacrificial layer between sequential wrinkling steps.
- Applicability across diverse materials including metals, 2D/1D materials, and polymers.
Main Results:
- Successfully fabricated hierarchical wrinkles with multiscale structures (nanometers to micrometers).
- Demonstrated the method's universality across tested thin-film materials.
- Hierarchical MoS2 wrinkles showed enhanced catalytic behavior due to superaerophobicity and increased effective surface area.
Conclusions:
- The developed sequential wrinkling method is a universal approach for fabricating hierarchical wrinkles on various thin films.
- This technique can significantly enhance the physical properties of materials.
- The method holds potential for improving catalytic applications and other material functionalities.
