A Melamine Sponge-MXene@CsPbBr3 Aerogel for Flexible Tactile Sensor with Decoupled Multimodal Sensing Capacity

Humanoid robots, except the sensing requirement of force and temperature, will get high risk of prolonged exposure to complex light conditions, especially the UV radiation in automotive baking workshop, outer space, et. al, which will make the circuits and electronic components extremely prone to aging, needing timely assessment as well. Here, a multimodal flexible tactile sensor is assembled by utilizing a novel melamine sponge-MXene@CsPbBr3 hybrid aerogel as the sensing unit, which the melamine sponge provides the deformable support skeleton, the MXene realizes the functions of piezoresistive pressure sensing and thermoelectric temperature detecting, and the CsPbBr3 realizes not only the light sensing behavior, especially the visual capacity of ultraviolet excited photoluminescence, but also the synergetic enhancement of thermoelectric ability. Via these different kinds of sensing mechanisms, the derived flexible tactile sensor realizes the multimodal response to pressure, temperature and ultraviolet without cross-coupling. Furthermore, via using a machine learning algorithm, it can distinguish hardness and material of six automotive parts with high recognition accuracy of 98.2 % and 98.6 %, respectively. Moreover, based on the visual photoluminescence capability, a sensory array is assembled to successfully recognize different shapes. These provides a feasible way to protect the robots when using in complex operating environments.