Flash-Induced Stretchable Cu Conductor via Multiscale-Interfacial Couplings

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Herein, a novel stretchable Cu conductor with excellent conductivity and stretchability is reported via the flash-induced multiscale tuning of Cu and an elastomer interface. Microscale randomly wrinkled Cu (amplitude of approximate to 5 mu m and wavelength of approximate to 45 mu m) is formed on a polymer substrate through a single pulse of a millisecond flash light, enabling the elongation of Cu to exceed 20% regardless of the stretching direction. The nanoscale interlocked interface between the Cu nanoparticles (NPs) and the elastomer increases the adhesion force of Cu, which contributes to a significant improvement of the Cu stability and stretchability under harsh yielding stress. Simultaneously, the flash-induced photoreduction of CuO NPs and subsequent Cu NP welding lead to outstanding conductivity (approximate to 37 kS cm(-1)) of the buckled elastic electrode. The 3D structure of randomly wrinkled Cu is modeled by finite element analysis simulations to show that the flash-activated stretchable Cu conductors can endure strain over 20% in all directions. Finally, the wrinkled Cu is utilized for wireless near-field communication on the skin of human wrist.
Publisher
WILEY
Issue Date
2018-10
Language
English
Article Type
Article
Citation

ADVANCED SCIENCE, v.5, no.11, pp.1801146

ISSN
2198-3844
DOI
10.1002/advs.201801146
URI
http://hdl.handle.net/10203/248302
Appears in Collection
RIMS Journal PapersME-Journal Papers(저널논문)MS-Journal Papers(저널논문)
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