Highly Sensitive Graphene Touch Sensing Breakthrough And Ultrasonic Sensor

- Jun 11, 2019-

Recently, the Chongqing Research Institute of the Chinese Academy of Sciences and the National University of Singapore have developed a three-dimensional micro-nano-conformal graphene flexible force-sensitive electrode for high-sensitivity flexible pressure-capacitive tactile sensing.

It is reported that the Micro-Nano Center of the Chongqing Research Institute of the Chinese Academy of Sciences has been working on the controllable preparation technology and application of two-dimensional/three-dimensional graphene. In the early stage, three-dimensional micro-nano conformal graphene direct growth and flexible transfer technology, three-dimensional conformal graphene were developed. The film not only has high electrical conductivity, but also exhibits high mechanical reliability and is an ideal material for flexible electrodes.

Recently, researchers at the center have found through finite element simulation that the microstructured conformal graphene electrode is more likely to obtain the plate spacing and equivalent dielectric constant change in the capacitive mechanical sensor. Through the controllable construction of the characteristic dimensions of the three-dimensional conformal graphene electrode, the research group realized a flexible capacitive tactile sensor with high sensitivity, fast response, low detection limit and low hysteresis. The main indicators have exceeded the level of human tactile perception.

graphene touch sensing breakthrough

According to the official news of the Chinese Academy of Sciences, the tactile sensor can sense the slight pressure changes generated during insect crawling and record its gait information. The sensor can also monitor the pulse wave in real time to monitor the pulse, or use the force feedback to assist the robot to achieve intelligent capture of the object.

Compared with the traditional tactile sensor, the sensor has the characteristics of high sensitivity, fast response, flexibility, light weight, and distributed attachment, which can better fit the contoured surface of the robot and give the robot a tactile function. Expand the intelligence and application areas of robots.

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