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Biaxially stretchable transparent conductors that use nanowire networks

Published online by Cambridge University Press:  21 November 2014

Xinning Ho ,
Chek Kweng Cheng ,
Ju Nie Tey  and
Jun Wei
Xinning Ho*
Affiliation:
Singapore Institute of Manufacturing Technology, Singapore 638075, Singapore
Chek Kweng Cheng
Affiliation:
Singapore Institute of Manufacturing Technology, Singapore 638075, Singapore
Ju Nie Tey
Affiliation:
Singapore Institute of Manufacturing Technology, Singapore 638075, Singapore
Jun Wei*
Affiliation:
Singapore Institute of Manufacturing Technology, Singapore 638075, Singapore
*
a)Address all correspondence to these authors. e-mail: xnho@SIMTech.a-star.edu.sg
b)e-mail: jwei@SIMTech.a-star.edu.sg
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Abstract

Stretchable transparent conductors are required for flexible and wearable electronics. This study demonstrates biaxially stretchable transparent conductors that use silver nanowire networks. The use of buckled nanowire networks has previously been reported to lend stretchability to the transparent conductor in a single axis. However, a nanowire network that is prestrained and then buckled out-of-plane biaxially shows a deterioration of the electrical conductivity after a single cycle of stretching and releasing the strain uniaxially. This has been attributed to the loss of good electrical contact between the nanowires. By hot pressing the out-of-plane buckled nanowires to obtain an in-plane wavy nanowire network with good wire-to-wire junctions, a biaxially stretchable transparent conductor that maintains good electrical conductivity with stretching up to 10% is demonstrated. The methods of prestraining the nanowire network to achieve out-of-plane buckled nanowires and hot pressing the out-of-plane buckled nanowires to obtain an in-plane wavy nanowire network with fused junctions are expected to be practical for other classes of percolative networks based on one-dimensional (1D) materials used in flexible and stretchable applications.

Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 24 , 28 December 2014 , pp. 2965 - 2972
Copyright
Copyright © Materials Research Society 2014 

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References

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