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Park, Jang-Ung
Flexible Nano-electronics & Biotechnology Lab
Research Interests
  • Wireless wearable electronics, flexible electronics, printed electronics, nano-bio interfaces

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Rapid production of large-area, transparent and stretchable electrodes using metal nanofibers as wirelessly operated wearable heaters

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Title
Rapid production of large-area, transparent and stretchable electrodes using metal nanofibers as wirelessly operated wearable heaters
Author
Jang, JiukHyun, Byung GwanJi, SangyoonCho, EunjinAn, Byeong WanCheong, Woon HyungPark, Jang-Ung
Issue Date
201709
Publisher
NATURE PUBLISHING GROUP
Citation
NPG ASIA MATERIALS, v.9, no., pp.e432 -
Abstract
A rapidly growing interest in wearable electronics has led to the development of stretchable and transparent heating films that can replace the conventional brittle and opaque heaters. Herein, we describe the rapid production of large-area, stretchable and transparent electrodes using electrospun ultra-long metal nanofibers (mNFs) and demonstrate their potential use as wirelessly operated wearable heaters. These mNF networks provide excellent optoelectronic properties (sheet resistance of similar to 1.3 O per sq with an optical transmittance of similar to 90%) and mechanical reliability (90% stretchability). The optoelectronic properties can be controlled by adjusting the area fraction of the mNF networks, which also enables the modulation of the power consumption of the heater. For example, the low sheet resistance of the heater presents an outstanding power efficiency of 0.65 W cm(-2) (with the temperature reaching 250 degrees C at a low DC voltage of 4.5 V), which is similar to 10 times better than the properties of conventional indium tin oxide-based heaters. Furthermore, we demonstrate the wireless fine control of the temperature of the heating film using Bluetooth smart devices, which suggests substantial promise for the application of this heating film in next-generation wearable electronics.
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DOI
http://dx.doi.org/10.1038/am.2017.172
ISSN
1884-4049
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MSE_Journal Papers
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