期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 26, 页码 29861-29867出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c08397
关键词
e-textiles; wearables; carbon; graphene; temperature sensors; textile fibers
资金
- European Commission [H2020-MSCA-IF-2015-704963]
- EPSRC [EP/S019855/1, EP/M001024/1]
- College of Engineering Mathematics and Physical Sciences, University of Exeter
- Portuguese Foundation for Science and Technology [IF/01088/2014, UIDB/50011/2020, POCI-01-0145-FEDER-032072]
- EPSRC [EP/M001024/1, EP/S019855/1] Funding Source: UKRI
Graphene-coated polypropylene (PP) textile fibers are presented for their use as temperature sensors. These temperature sensors show a negative thermal coefficient of resistance (TCR) in a range between 30 and 45 degrees C with good sensitivity and reliability and can operate at voltages as low as 1 V. The analysis of the transient response of the temperature on resistance of different types of graphene produced by chemical vapor deposition (CVD) and shear exfoliation of graphite (SEG) shows that trilayer graphene (TLG) grown on copper by CVD displays better sensitivity due to the better thickness uniformity of the film and that carbon paste provides good contact for the measurements. Along with high sensitivity, TLG on PP shows not only the best response but also better transparency, mechanical stability, and washability compared to SEG. Temperature-dependent Raman analysis reveals that the temperature has no significant effect on the peak frequency of PP and expected effect on graphene in the demonstrated temperature range. The presented results demonstrate that these flexible, lightweight temperature sensors based on TLG with a negative TCR can be easily integrated in fabrics.
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