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Ultrasensitive electrolyte-assisted temperature sensor
Linköping University, Sweden.
RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.ORCID iD: 0000-0002-2904-7238
RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.ORCID iD: 0000-0002-4575-0193
Linköping University, Sweden.
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2020 (English)In: npj Flexible Electronics, ISSN 2397-4621, Vol. 4, no 1, article id 23Article in journal (Refereed) Published
Abstract [en]

Heat sensors form an important class of devices that are used across multiple fields and sectors. For applications such as electronic skin and health monitoring, it is particularly advantageous if the output electronic signals are not only high, stable, and reproducible, but also self-generated to minimize power consumption. Here, we present an ultrasensitive heat sensing concept that fulfills these criteria while also being compatible with scalable low-cost manufacturing on flexible substrates. The concept resembles a traditional thermocouple, but with separated electrodes bridged by a gel-like electrolyte and with orders of magnitudes higher signals (around 11 mV K−1). The sensor pixels provide stable and reproducible signals upon heating, which, for example, could be used for heat mapping. Further modification to plasmonic nanohole metasurface electrodes made the sensors capable of also detecting light-induced heating. Finally, we present devices on flexible substrates and show that they can be used to detect human touch. © 2020, The Author(s).

Place, publisher, year, edition, pages
Nature Research , 2020. Vol. 4, no 1, article id 23
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-48921DOI: 10.1038/s41528-020-00086-5Scopus ID: 2-s2.0-85091063196OAI: oai:DiVA.org:ri-48921DiVA, id: diva2:1476457
Note

Funding details: Dimbleby Cancer Care, DCC, 2016-05193; Funding details: Vetenskapsrådet, VR; Funding details: Wenner-Gren Stiftelserna; Funding details: Stiftelsen för Strategisk Forskning, SSF; Funding details: Linköpings Universitet, LiU, 2009 00971; Funding text 1: The authors gratefully acknowledge financial support from the Swedish Foundation for Strategic Research, the Swedish Research Council, the Wenner-Gren Foundations, Essity, the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linköping University (Faculty Grant SFO-Mat-LiU No. 2009 00971) and the Vinnova Digital Cellulose Competence Center (DCC), Diary number 2016-05193. The work was also supported by Treesearch.se. Open access funding provided by Linköping University.

Available from: 2020-10-14 Created: 2020-10-14 Last updated: 2023-06-09Bibliographically approved

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