3D tubular graphene sponge/PEDOT:PSS based stretchable and flexible device for noninterfering pressure-temperature detection

Skin-like pressure- and temperature-sensing capabilities are two important indicators for artificial human skins and flexible wearable sensors. However, artifact interference between measured signals has always been the technical difficulty in realizing multi-parameter real-time and highly sensitive monitoring. Herein, a stretchable and flexible pressure-temperature sensitive device based on 3D tubular graphene sponge/PEDOT:PSS composite is designed and fabricated. The hybrid Ag NWs/CNTs composite based embedded stretchable electrodes is selected as the signal transmission lines, which had the ability to resist tensile strain failure. The pressure-resistance module and the temperature-voltage module exhibits distinguishable features of detecting pressure and temperature stimulus simultaneously. The detection sensitivity of pressure and temperature stimuli is 43 kPa−1 and 24.5 μV/K, respectively. Moreover, a 3 × 3 sensor array is demonstrated to verify its monitoring effects in static and dynamic surroundings, illustrating its promising applications, such as health monitoring components, biomimetic soft wearable devices and human-machine interaction.