학술논문
Wide-range soft anisotropic thermistor with a direct wireless radio frequency interface.
Document Type
Academic Journal
Author
Wagih M; University of Glasgow, James Watt School of Engineering, Glasgow, UK. Mahmoud.Wagih@glasgow.ac.uk.; Shi J; University of Southampton, School of Electronics and Computer Science, Southampton, UK.; PragmatIC Semiconductor Ltd., Cambridge, UK.; Li M; University of Southampton, School of Electronics and Computer Science, Southampton, UK.; Komolafe A; University of Southampton, School of Electronics and Computer Science, Southampton, UK.; Whittaker T; Loughborough University, Wolfson School of Mechanical, Electrical, and Manufacturing Engineering, Loughborough, UK.; Schneider J; University of Glasgow, James Watt School of Engineering, Glasgow, UK.; Kumar S; University of Glasgow, James Watt School of Engineering, Glasgow, UK.; Whittow W; Loughborough University, Wolfson School of Mechanical, Electrical, and Manufacturing Engineering, Loughborough, UK.; Beeby S; University of Southampton, School of Electronics and Computer Science, Southampton, UK.
Source
Publisher: Nature Pub. Group Country of Publication: England NLM ID: 101528555 Publication Model: Electronic Cited Medium: Internet ISSN: 2041-1723 (Electronic) Linking ISSN: 20411723 NLM ISO Abbreviation: Nat Commun Subsets: PubMed not MEDLINE; MEDLINE
Subject
Language
English
Abstract
Temperature sensors are one of the most fundamental sensors and are found in industrial, environmental, and biomedical applications. The traditional approach of reading the resistive response of Positive Temperature Coefficient thermistors at DC hindered their adoption as wide-range temperature sensors. Here, we present a large-area thermistor, based on a flexible and stretchable short carbon fibre incorporated Polydimethylsiloxane composite, enabled by a radio frequency sensing interface. The radio frequency readout overcomes the decades-old sensing range limit of thermistors. The composite exhibits a resistance sensitivity over 1000 °C -1 , while maintaining stability against bending (20,000 cycles) and stretching (1000 cycles). Leveraging its large-area processing, the anisotropic composite is used as a substrate for sub-6 GHz radio frequency components, where the thermistor-based microwave resonators achieve a wide temperature sensing range (30 to 205 °C) compared to reported flexible temperature sensors, and high sensitivity (3.2 MHz/°C) compared to radio frequency temperature sensors. Wireless sensing is demonstrated using a microstrip patch antenna based on a thermistor substrate, and a battery-less radio frequency identification tag. This radio frequency-based sensor readout technique could enable functional materials to be directly integrated in wireless sensing applications.
(© 2024. The Author(s).)
(© 2024. The Author(s).)