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Yang X, Zhao Y, Xie J, et al. Bioinspired Fabrication of Free-Standing Conducting Films with Hierarchical Surface Wrinkling Patterns. ACS Nano. 2016;10(3):3801-8doi: 10.1021/acsnano.6b00509.
Yang, X., Zhao, Y., Xie, J., Han, X., Wang, J., Zong, C., Ji, H., Zhao, J., Jiang, S., Cao, Y., & Lu, C. (2016). Bioinspired Fabrication of Free-Standing Conducting Films with Hierarchical Surface Wrinkling Patterns. ACS nano, 10(3), 3801-8. https://doi.org/10.1021/acsnano.6b00509
Yang, Xiu, et al. "Bioinspired Fabrication of Free-Standing Conducting Films with Hierarchical Surface Wrinkling Patterns." ACS nano vol. 10,3 (2016): 3801-8. doi: https://doi.org/10.1021/acsnano.6b00509
Yang X, Zhao Y, Xie J, Han X, Wang J, Zong C, Ji H, Zhao J, Jiang S, Cao Y, Lu C. Bioinspired Fabrication of Free-Standing Conducting Films with Hierarchical Surface Wrinkling Patterns. ACS Nano. 2016 Mar 22;10(3):3801-8. doi: 10.1021/acsnano.6b00509. Epub 2016 Mar 09. PMID: 26943273.
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ACS Nano. 2016 Mar 22;10(3):3801-8. doi: 10.1021/acsnano.6b00509. Epub 2016 Mar 09.

Bioinspired Fabrication of Free-Standing Conducting Films with Hierarchical Surface Wrinkling Patterns.

ACS nano

Xiu Yang, Yan Zhao, Jixun Xie, Xue Han, Juanjuan Wang, Chuanyong Zong, Haipeng Ji, Jingxin Zhao, Shichun Jiang, Yanping Cao, Conghua Lu

Affiliations

  1. School of Materials Science and Engineering, Tianjin University , Tianjin 300072, China.
  2. AML, Department of Engineering Mechanics, Tsinghua University , Beijing 100084, China.

PMID: 26943273 DOI: 10.1021/acsnano.6b00509

Abstract

Mechanical instability has been shown to play an important role in the formation of wrinkle structures in biofilms, which not only can adopt instability modes as templates to regulate their 3D architectures but also can tune internal stresses to achieve stable patterns. Inspired by nature, we report a mechanical-chemical coupling method to fabricate free-standing conducting films with instability-driven hierarchical micro/nanostructured patterns. When polypyrrole (PPy) film is grown on an elastic substrate via chemical oxidation polymerization, differential growth along with in situ self-reinforcing effect induces stable wrinkle patterns with different scales of wavelengths. The self-reinforcing effect modifies the internal stresses, hence PPy films with intact wrinkles can be removed from substrates and further transferred onto target substrates for functional device fabrication. To understand the buckling mechanics, we construct a model which reveals the formation of hierarchical wrinkle patterns.

Keywords: free-standing; mechanical properties; polypyrrole; surface patterns; surface wrinkling

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