Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 31, Pages 26604-26609Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b06482
Keywords
photo-thermoelectric; flexible polymer-carbon nanotube composite; moderately enhanced PVA crystallinity; high response stability; wearable human-body thermal imaging
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canada Research Chairs program (CRC)
- CMC Microsystems Micro-Nano Technology (MNT) Financial Assistance [4779]
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In this work, we report a wearable thermal detector based on poly(vinyl alcohol) and carbon nanotube (CNT) composite via photo-thermoelectric effect. Passive room-temperature human body thermal imaging is demonstrated with optimum detectivity up to 4.9 x 10(6) cm Hz(1/2) W-1. Highly stable photoresponse (variation < 4%) is obtained under a bending radius down to 3.5 mm. We also found that the detector photoresponse is influenced by the composite channel length because of Seebeck effect. This flexible, self-powered, and sensitive detector opens up opportunities for wearable thermal imaging and real-time health monitoring.
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