The new sensor accurately "reads" the human micro-expression

Recently, Liang Jiajie's research group of Nankai University successfully solved the contradiction between high sensitivity and large working deformation in stress sensors by using the synergistic effect of three low-dimensional nano materials. This research has greatly improved the performance of stress sensor devices such as wearable devices, and can accurately capture the subtle expression changes of the human body.

Liang Jiajie's research group uses the synergistic effect of a variety of nano-functional materials such as fullerenes, metallic silver nanowires, and graphene oxide to improve the flexibility of the host material by introducing a guest material with a low coefficient of friction into a rigid layered structural host material. Solved the problem that has long plagued academic circles. The sensor made of this material maintains extremely high response sensitivity over a wide range of operating deformations. The research team wears the new wearable stress sensor on different parts of the human body for monitoring the full range of human motion, which can clearly capture the slight skin movement changes caused by pulse beat on the human wrist; and the pulse of the human body beats 3 The characteristic peaks are clearly reflected; wearing the neck and throat position, you can clearly perceive the human voice band and recognize different syllable changes.

According to another introduction, the new stress sensor can be printed in one step by printing method, which has the advantages of good repeatability and simple preparation process, and can provide a good material basis for real productization. At present, the research group is actively coordinating and promoting the stress sensor to be popularized and applied in wearable devices related to human motion detection and human health monitoring. The relevant results were published in the latest issue of Advanced Functional Materials.