In recent years, there has been an increasing demand for flexible electronics such as integrated circuits, wearable devices, and implanted electronics, which has greatly promoted the development of flexible electronics. Multi-analytical detection in complex environments requires multi-dimensional precision response and smooth signal transmission to ensure recognition resolution and detection sensitivity. However, how to solve the problem of interface fusion of multi-material integration and the single function of single material is still a challenging topic in the field of multi-resolution sensors. Recently, researchers of the Institute of Chemistry of the Chinese Academy of Sciences, Professor Yan Yanlin, Associate Researcher Li Fengqi and Associate Professor Ma Ying of Shenyang Jianzhu University, inspired by the spiral and radiation microstructures and unique assembly methods in spider webs, developed a new type of research. Multi-resolution graphene touch sensor.
Figure 1. Bionic spider web multi-resolution graphene tactile sensor.
The Song Yanlin team used highly sensitive graphene aerogel as the induction material, and used the highly conductive and high-stability graphene ribbon as the transmission material. Statistical principal component analysis (PCA) and hierarchical cluster analysis (HCA) were selected. And linear discriminant analysis (LDA) to evaluate the spatial resolution of graphene multi-structure sensors. The results show that the design of integrating different structures can realize the identification of direction, distance and position. In order to further prove the application potential of multi-structure graphene in flexible electrons, they designed an electronic skin with a tightly packed structure of graphene and porous structure graphene. The mechanical finger can be individually controlled by the corresponding graphene aerogel, and the bending and stretching of the mechanical finger can be manipulated by gently swiping the finger on the graphene aerogel, and the measured minimum force can reach 3.83×10-3 Pa.