Volume 19, Issue 21 2207327
Research Article

Electrochemical Oxidation to Fabricate Micro-Nano-Scale Surface Wrinkling of Liquid Metals

Zhuquan Zhou

Zhuquan Zhou

CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Engineering Science, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Zerong Xing

Zerong Xing

CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Qian Wang

Corresponding Author

Qian Wang

CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

E-mail: [email protected]; [email protected]

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Jing Liu

Corresponding Author

Jing Liu

CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, 100084 P. R. China

E-mail: [email protected]; [email protected]

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First published: 03 March 2023
Citations: 8

Abstract

Constructing wrinkled structures on the surface of materials to obtain new functions has broad application prospects. Here a generalized method is reported to fabricate multi-scale and diverse-dimensional oxide wrinkles on liquid metal surfaces by an electrochemical anodization method. The oxide film on the surface of the liquid metal is successfully thickened to hundreds of nanometers by electrochemical anodization, and then the micro-wrinkles with height differences of several hundred nanometers are obtained by the growth stress. It is succeeded in altering the distribution of growth stress by changing the substrate geometry to induce different wrinkle morphologies, such as one-dimensional striped wrinkles and two-dimensional labyrinth wrinkles. Further, radial wrinkles are obtained under the hoop stress induced by the difference in surface tensions. These hierarchical wrinkles of different scales can exist on the liquid metal surface simultaneously. Surface wrinkles of liquid metal may have potential applications in the future for flexible electronics, sensors, displays, and so on.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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