Pressure sensor with wide detection range and high sensitivity for wearable human health monitoring

Abstract

Abstract High-performance flexible pressure sensors have garnered significant attention in fields such as wearable electronics and human-machine interfaces. However, the development of flexible pressure sensors that simultaneously achieve high sensitivity, a wide detection range, and good mechanical stability remains a challenge. In this paper, we propose a flexible piezoresistive pressure sensor based on a Ti 3 C₂Tx (MXene)/polyethylene oxide (PEO) composite nanofiber membrane (CNM). The sensor, utilizing MXene (0.4 wt%)/PEO (5 wt%), exhibits high sensitivity (44.34 kPa −1 at 0−50 kPa, 12.99 kPa −1 at 50−500 kPa) and can reliably monitor physiological signals and other subtle cues. Moreover, the sensor features a wide detection range (0−500 kPa), fast response and recovery time (~150/45 ms), and excellent mechanical stability (over 10 000 pressure cycles at maximum load). Through an MXene/PEO sensor array, we demonstrate its applications in human physiological signal monitoring, providing a reliable way to expand the application of MXene-based flexible pressure sensors.