title: Controllable wrinkle configurations by soft micro-patterns to enhance the stretchability of Si ribbons.
abstract: Wrinkle configurations can provide brittle Si ribbons with excellent stretchability via mechanical buckling. We propose a strategy using micro-patterns to control the wrinkle configurations in 'pop-up' and 'pop-down' styles, as well as the wrinkle's wavelength. After the wrinkle configuration is stretched flat, the micro-patterns will deform to buffer the Si ribbons, which enhances the additional stretchability of such structures. The experimental results show that the micro-patterns determine the wrinkle configurations of Si ribbons and their stretchability can reach 51.2%. The analytical modeling and FEM simulation reveal the mechanism of such a phenomenon.
authors.affiliation: AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China. fengxue@tsinghua.edu.cn.
authors.forename: Yin
authors.initials: Y
authors.lastname: Huang
authors.forename: Hang
authors.initials: H
authors.lastname: Chen
authors.forename: Jian
authors.initials: J
authors.lastname: Wu
authors.forename: Xue
authors.initials: X
authors.lastname: Feng