Ti3C2Tx MXene-based multifunctional wearable integrated sensor for simultaneous detection of humidity and pressure stimuli

Although wearable electronic sensors have demonstrated promising applications in the fields of health monitoring, human-machine interaction, and soft robotics, they still face challenges in multifunctionality, integration, facile production and low cost using conventional materials. MXene, as an emerging two-dimensional material, integrated with favorable physical/chemical properties is expected to solve these problems. Herein, we propose an integrated pressure-humidity sensor using Ti₃C₂T_x MXene as the sole sensitive material, which can precisely detect and distinguish pressure and humidity signals without cross-talk. Notably, the integrated pressure-humidity sensor exhibits not only a wide response range (8–125 kPa) with high sensitivity (1878.05 kPa⁻¹) for pressure detection, but also wide response range (11.5 %-98.1 % RH), high sensitivity (0.67 % (%RH)⁻¹) and rapid response (response 3.46 s, recovery 1.50 s) for humidity detection. Based on the above outstanding dual-mode sensing performances, the sensor is applied in monitoring diverse physiological parameters of human such as respiratory patterns, sweat levels, and joint movements, revealing great potential for health monitoring and human-machine interaction.