Low-cost and high-performance flexible resistive pressure sensor based on MoS2/PEDOT:PSS@PU with three-dimensional porous structure.

Molybdenum disulfide (MoS2) is a material that is capable of contributing to flexible pressure sensor because of its high mechanical flexibility and huge specific surface area. In this study, a flexible pressure sensor with low manufacturing cost and excellent performance was innovatively fabricated by uniformly coating MoS2 nanosheets and PEDOT:PSS onto a porous polyurethane (PU) framework through a impregnation solution processing technology. The ingenious synergy between materials in flexible pressure sensors fundamentally endows the sensors with outstanding overall performance. PEDOT:PSS serves as a conductive agent to improve electron transport efficiency, and the porous PU framework induces a larger resistance variation upon compression. The sensor exhibits high sensitivity (1.711 kPa-1), a wide sensing range (200 kPa), and rapid response time (90 ms). The demonstration of the sensor developed, in human motion monitoring, flexible keyboards, and spatial pressure distribution detection, offers promising applications of the MoS2 based flexible sensors in various industries.