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SJTU Research Teams Published Interdisciplinary Research in National Science Review

July 20, 2020      Author: Institute of Vibration, Shock & Noise

Recently, Researcher Jiang Xuesong’s team from School of Chemistry and Chemical Engineering and Prof. Zhang Wenming’s team from School of Mechanical Engineering jointly carried out interdisciplinary research and published a research paper titled “Regulating Surface Wrinkles Using Light” in National Science Review. The research revealed the relation between 2D wrinkle topographies and the regulation of surface stress relaxation, and clarified the competitive mechanism between the elastic modulus enhancement effect, asymmetric stress relaxation and orthogonal exposures. They proposed a novel light-controlled strategy for surface wrinkles, which can dynamically and precisely regulate all basic characteristics of wrinkles. Zhou Liangwei, a doctorate student of the School of Chemistry and Chemical Engineering, and Hu Kaiming, a post doctorate of the School of Mechanical Engineering, are the co-first authors. Researcher Jiang Xuesong and Prof. Zhang Wenming are the co-corresponding authors.

The research was supported by the National Natural Science Foundation of China (51773114, 21704062 and 11802173), the Shanghai Municipal Government (17JC1400700) and the Postdoctoral Innovative Talent support program (BX20180190), etc.

Paper link:: https://doi.org/10.1093/nsr/nwaa052

Abstract

Regulating existing micro and nano wrinkle structures into desired configurations is urgently necessary yet remains challenging, especially modulating wrinkle direction and location on demand. In this work, we propose a novel light-controlled strategy for surface wrinkles, which can dynamically and precisely regulate all basic characteristics of wrinkles, including wavelength, amplitude, direction and location (λ, A, θ and Lc), and arbitrarily tune wrinkle topographies in two dimensions (2D). By considering the bidirectional Poisson's effect and soft boundary conditions, a modified theoretical model depicting the relation between stress distributions and the basic characteristics was developed to reveal the mechanical mechanism of the regulation strategy. Furthermore, the resulting 2D ordered wrinkles can be used as a dynamic optical grating and a smart template to reversibly regulate the morphology of various functional materials. This study will pave the way for wrinkle regulation and guide fabrication technology for functional wrinkled surfaces.

Translated by Zhou Rong