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

Author

Listed:
  • Byeong Wan An

    (Ulsan National Institute of Science and Technology (UNIST))

  • Sanghyun Heo

    (Ulsan National Institute of Science and Technology (UNIST))

  • Sangyoon Ji

    (Ulsan National Institute of Science and Technology (UNIST))

  • Franklin Bien

    (Ulsan National Institute of Science and Technology (UNIST))

  • Jang-Ung Park

    (Ulsan National Institute of Science and Technology (UNIST))

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.

Suggested Citation

  • Byeong Wan An & Sanghyun Heo & Sangyoon Ji & Franklin Bien & Jang-Ung Park, 2018. "Transparent and flexible fingerprint sensor array with multiplexed detection of tactile pressure and skin temperature," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04906-1
    DOI: 10.1038/s41467-018-04906-1
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    Cited by:

    1. Yanhua Liu & Jinlong Wang & Tao Liu & Zhiting Wei & Bin Luo & Mingchao Chi & Song Zhang & Chenchen Cai & Cong Gao & Tong Zhao & Shuangfei Wang & Shuangxi Nie, 2025. "Triboelectric tactile sensor for pressure and temperature sensing in high-temperature applications," Nature Communications, Nature, vol. 16(1), pages 1-10, December.

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