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

Byeong Wan An; Sanghyun Heo; Sangyoon Ji; Franklin Bien; Jang Ung Park

doi:10.1038/s41467-018-04906-1

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

Byeong Wan An, Sanghyun Heo, Sangyoon Ji, Franklin Bien, Jang Ung Park

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

248 Citations (Scopus)

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.

Original language	English
Article number	2458
Journal	Nature communications
Volume	9
Issue number	1
DOIs	https://doi.org/10.1038/s41467-018-04906-1
Publication status	Published - 2018 Dec 1

Bibliographical note

Funding Information:
This work was supported by the Ministry of Science and ICT and the Ministry of Trade, Industry, and Energy (MOTIE) of Korea through the National Research Foundation (2016R1A2B3013592 and 2016R1A5A1009926), the Bio & Medical Technology Development Program (2018M3A9F1021649), the Nano Material Technology Development Program (2015M3A7B4050308 and 2016M3A7B4910635), the Convergence Technology Development Program for Bionic Arm (NRF-2017M3C1B2085316), the Industrial Technology Innovation Program (10080577), and the Pioneer Research Center Program (NRF-2014M3C1A3001208). Also, the authors gratefully acknowledge financial support by the Development Program (1.170009.01) funded by UNIST.

Funding Information:
This work was supported by the Ministry of Science and ICT and the Ministry of Trade, Industry, and Energy (MOTIE) of Korea through the National Research Foundation (2016R1A2B3013592 and 2016R1A5A1009926), the Bio &Medical Technology Development Program (2018M3A9F1021649), the Nano Material Technology Development Program (2015M3A7B4050308 and 2016M3A7B4910635), the Convergence Technology Development Program for Bionic Arm (NRF-2017M3C1B2085316), the Industrial Technology Innovation Program (10080577), and the Pioneer Research Center Program (NRF-2014M3C1A3001208). Also, the authors gratefully acknowledge financial support by the Development Program (1.170009.01) funded by UNIST.

Publisher Copyright:
© 2018 The Author(s).

All Science Journal Classification (ASJC) codes

Chemistry(all)
Biochemistry, Genetics and Molecular Biology(all)
Physics and Astronomy(all)

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10.1038/s41467-018-04906-1

Cite this

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title = "Transparent and flexible fingerprint sensor array with multiplexed detection of tactile pressure and skin temperature",

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.",

author = "An, {Byeong Wan} and Sanghyun Heo and Sangyoon Ji and Franklin Bien and Park, {Jang Ung}",

note = "Funding Information: This work was supported by the Ministry of Science and ICT and the Ministry of Trade, Industry, and Energy (MOTIE) of Korea through the National Research Foundation (2016R1A2B3013592 and 2016R1A5A1009926), the Bio & Medical Technology Development Program (2018M3A9F1021649), the Nano Material Technology Development Program (2015M3A7B4050308 and 2016M3A7B4910635), the Convergence Technology Development Program for Bionic Arm (NRF-2017M3C1B2085316), the Industrial Technology Innovation Program (10080577), and the Pioneer Research Center Program (NRF-2014M3C1A3001208). Also, the authors gratefully acknowledge financial support by the Development Program (1.170009.01) funded by UNIST. Funding Information: This work was supported by the Ministry of Science and ICT and the Ministry of Trade, Industry, and Energy (MOTIE) of Korea through the National Research Foundation (2016R1A2B3013592 and 2016R1A5A1009926), the Bio &Medical Technology Development Program (2018M3A9F1021649), the Nano Material Technology Development Program (2015M3A7B4050308 and 2016M3A7B4910635), the Convergence Technology Development Program for Bionic Arm (NRF-2017M3C1B2085316), the Industrial Technology Innovation Program (10080577), and the Pioneer Research Center Program (NRF-2014M3C1A3001208). Also, the authors gratefully acknowledge financial support by the Development Program (1.170009.01) funded by UNIST. Publisher Copyright: {\textcopyright} 2018 The Author(s).",

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doi = "10.1038/s41467-018-04906-1",

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AU - Bien, Franklin

AU - Park, Jang Ung

N1 - Funding Information: This work was supported by the Ministry of Science and ICT and the Ministry of Trade, Industry, and Energy (MOTIE) of Korea through the National Research Foundation (2016R1A2B3013592 and 2016R1A5A1009926), the Bio & Medical Technology Development Program (2018M3A9F1021649), the Nano Material Technology Development Program (2015M3A7B4050308 and 2016M3A7B4910635), the Convergence Technology Development Program for Bionic Arm (NRF-2017M3C1B2085316), the Industrial Technology Innovation Program (10080577), and the Pioneer Research Center Program (NRF-2014M3C1A3001208). Also, the authors gratefully acknowledge financial support by the Development Program (1.170009.01) funded by UNIST. Funding Information: This work was supported by the Ministry of Science and ICT and the Ministry of Trade, Industry, and Energy (MOTIE) of Korea through the National Research Foundation (2016R1A2B3013592 and 2016R1A5A1009926), the Bio &Medical Technology Development Program (2018M3A9F1021649), the Nano Material Technology Development Program (2015M3A7B4050308 and 2016M3A7B4910635), the Convergence Technology Development Program for Bionic Arm (NRF-2017M3C1B2085316), the Industrial Technology Innovation Program (10080577), and the Pioneer Research Center Program (NRF-2014M3C1A3001208). Also, the authors gratefully acknowledge financial support by the Development Program (1.170009.01) funded by UNIST. Publisher Copyright: © 2018 The Author(s).

PY - 2018/12/1

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N2 - 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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Transparent and flexible fingerprint sensor array with multiplexed detection of tactile pressure and skin temperature

Abstract

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