RESEARCH ARTICLE

Controlling nested wrinkle morphology through the boundary effect on narrow-band thin films

  • Hanyang XU ,
  • Tielin SHI ,
  • Guanglan LIAO ,
  • Qi XIA
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  • The State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China

Received date: 27 Feb 2017

Accepted date: 04 Apr 2017

Published date: 15 Jun 2019

Copyright

2017 Higher Education Press and Springer-Verlag Berlin Heidelberg

Abstract

We describe the formation of nested wrinkles created by the thermal mismatch between a narrow-band thin film and a compliant substrate. When a film is described as “narrow-band”, it literally means that the film band width is much shorter than its length; more precisely, it means that the width is comparable with the wavelength of the wrinkles. A silicon mask was used during film sputtering to create narrow-band films on poly (dimethylsiloxane) substrate, thus creating regular boundaries to steer local stresses and control wrinkle morphology. Disordered nano-scale wrinkles were found nested within highly ordered micro-scale sinusoidal wrinkles. The formation of nested wrinkles was explained through the amplitude and wavelength saturation of nano-scale wrinkles. The disordered morphology of nano-scale wrinkles and the highly ordered morphology of micro-scale wrinkles were explained by using the boundary effect.

Cite this article

Hanyang XU , Tielin SHI , Guanglan LIAO , Qi XIA . Controlling nested wrinkle morphology through the boundary effect on narrow-band thin films[J]. Frontiers of Mechanical Engineering, 2019 , 14(2) : 235 -240 . DOI: 10.1007/s11465-017-0458-6

Acknowledgement

This work was supported by the Natural Science Foundation of Hubei Province of China (Grant No. 2015CFB443).
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