Abstract
The reasonable design pattern of flexible pressure sensors with excellent performance and prominent features including high sensitivity and a relatively wide workable linear range has attracted significant attention owing to their potential application in the advanced wearable electronics and artificial intelligence fields. Herein, nano carbon black from kerosene soot, an atmospheric pollutant generated during the insufficient burning of hydrocarbon fuels, was utilized as the conductive material with a bottom interdigitated textile electrode screen printed using silver paste to construct a piezoresistive pressure sensor with prominent performance. Owing to the distinct loose porous structure, the lumpy surface roughness of the fabric electrodes, and the softness of polydimethylsiloxane, the piezoresistive pressure sensor exhibited superior detection performance, including high sensitivity (31.63 kPa−1 within the range of 0–2 kPa), a relatively large feasible range (0–15 kPa), a low detection limit (2.26 pa), and a rapid response time (15 ms). Thus, these sensors act as outstanding candidates for detecting the human physiological signal and large-scale limb movement, showing their broad range of application prospects in the advanced wearable electronics field.
Highlights
Electronics with flexible, extensible, and wearable traits have recently attracted significant research interests for a broad range of applications, including electronic skins [1,2], health-monitoring devices [3,4,5,6], flexible displays, and energy-harvesting devices [7]
Owing to the high conductivity of the nano carbon black (NCB) coating, the large surface roughness of the fabric electrodes, and the softness of PDMS substrate, the piezoresistive pressure sensor prepared exhibited excellent performance, including ultra-high sensitivity (31.63 kPa−1 within the range of 0–2 kPa), a large feasible pressure range (0–15 kPa), a low detection limit (2.26 pa), and a rapid response (15 ms), which are among the best outcomes for wearable electronics
NCB was coated on the surface of the glass by collecting the soot from a burning kerosene lamp
Summary
Electronics with flexible, extensible, and wearable traits have recently attracted significant research interests for a broad range of applications, including electronic skins [1,2], health-monitoring devices [3,4,5,6], flexible displays, and energy-harvesting devices [7]. Owing to the high conductivity of the NCB coating, the large surface roughness of the fabric electrodes, and the softness of PDMS substrate, the piezoresistive pressure sensor prepared exhibited excellent performance, including ultra-high sensitivity (31.63 kPa−1 within the range of 0–2 kPa), a large feasible pressure range (0–15 kPa), a low detection limit (2.26 pa), and a rapid response (15 ms), which are among the best outcomes for wearable electronics. On account of these outstanding detection properties, these electronic sensors were able to detect wrist pulse and carotid pulse signals. The concept paves a novel way for the cost-effective, lightweight, and simple fabrication of wearable electronics
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