A flexible active dual-parameter sensor for sensitive temperature and physiological signal monitoring via integrating thermoelectric and piezoelectric conversion. Issue 14 (18th March 2019)

• Record Type: Journal Article
• Authors: Zhu, Pengcheng; Wang, Yao; Sheng, Ming; Wang, Yaling; Yu, Yuedong; Deng, Yuan
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 14(2019)
• Page Start: 8258
• Page End: 8267
• Publication Date: 2019-03-18
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9ta00682f
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A flexible active dual-parameter sensor for sensitive temperature and physiological signal monitoring has been developed via integrating thermoelectric and piezoelectric conversion. Abstract : Flexible sensors with high sensitivity and selectivity to different external stimuli are highly desired in wearable electronics, especially those having more than one function. Here, we developed a flexible active dual-parameter sensor based on all organic piezoelectric poly(vinylidene fluoride) and thermoelectric polyaniline (PANI)-based composite films in a sandwiched structure, for sensitive temperature and physiological signal monitoring. Highly conductive PANI-based films working as electrodes resulted in higher electromechanical conversion than traditional metal electrodes. The functions of the device as a physiological signal active sensor were examined via human motion, including elbow bending, pronunciation, and artery pulse. The integration of high performance thermoelectric PANI-based films enabled the device to sense ambient temperature with high sensitivity (45.5 μV K −1 ) and a quick response (1.2 s). More importantly, a series of experiments proved that the device was capable of sensing temperature and tactile stimuli simultaneously without signal interference. Our work provided a promising prototype for an active dual-parameter sensor, which has great potential for application in wearable health-monitoring systems.