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Buckling-driven self-assembly of self-similar inspired micro/nanofibers for ultra-stretchable electronics

Abstract

Self-similar structures are capable of highly enhancing the deformability of stretchable electronics. We presented a self-assembly method based on tunable buckling of serpentine fiber-based interconnects (FiberBIs), which are deposited by our presented helix electrohydrodynamic printing (HE-printing) technique, to fabricate self-similar structures with enhanced stretchability (up to 250%). It provides a low-cost, printing-based approach for the generation of large-scale self-similar FiberBIs. Distinct buckling behaviors and modes occur under specific conditions. To elucidate the mechanics governing this phenomenon, we present detailed experimental and theoretical studies of the buckling mechanics of serpentine microfibers on compliant substrates. Firstly, the effect of the magnitude and direction of prestrain on buckling behavior of fiber-on-substrate is discussed. Secondly, the critical geometry of serpentine fiber as a key parameter for fabricating uniform self-similar fiber is also figured out. Finally, the cross-sectional geometry of the fiber as a judgment criterion for determining in-surface or out-of-surface buckling of the fiber is established. The investigation can guide the fabrication process of large-scale self-similar structures for high-performance electronic devices with extreme stretchability.

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Publication details

The article was received on 22 Aug 2017, accepted on 07 Sep 2017 and first published on 07 Sep 2017


Article type: Paper
DOI: 10.1039/C7SM01686G
Citation: Soft Matter, 2017, Accepted Manuscript
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    Buckling-driven self-assembly of self-similar inspired micro/nanofibers for ultra-stretchable electronics

    J. Bian, Y. Ding, Y. Duan, X. Wan and Y. Huang, Soft Matter, 2017, Accepted Manuscript , DOI: 10.1039/C7SM01686G

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