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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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Transparent and flexible fingerprint sensor array with multiplexed detection of tactile pressure and skin temperature

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Title
Transparent and flexible fingerprint sensor array with multiplexed detection of tactile pressure and skin temperature
Author
An, Byeong WanHeo, SanghyunJi, SangyoonBien, FranklinPark, Jang-Ung
Issue Date
201807
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v.9, no., pp.2458 -
Abstract
We developed a transparent and flexible, capacitive fingerprint sensor array with multiplexed, simultaneous detection of tactile pressure and finger skin temperature for mobile smart devices. In our approach, networks of hybrid nanostructures using ultra-long metal nanofibers and finer nanowires were formed as transparent, flexible electrodes of a multifunctional sensor array. These sensors exhibited excellent optoelectronic properties and outstanding reliability against mechanical bending. This fingerprint sensor array has a high resolution with good transparency. This sensor offers a capacitance variation ~17 times better than the variation for the same sensor pattern using conventional ITO electrodes. This sensor with the hybrid electrode also operates at high frequencies with negligible degradation in its performance against various noise signals from mobile devices. Furthermore, this fingerprint sensor array can be integrated with all transparent forms of tactile pressure sensors and skin temperature sensors, to enable the detection of a finger pressing on the display.
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DOI
http://dx.doi.org/10.1038/s41467-018-04906-1
ISSN
2041-1723
Appears in Collections:
ECE_Journal Papers
MSE_Journal Papers
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