This is mainly related to the improvement of people's attention to physical health, and began to use wearable devices to monitor various physical health indicators in real time. People hope that wearable devices can be directly Attached to the surface of the skin to obtain a series of health information such as blood pressure, blood sugar, pulse, etc., and collect this information into smart devices, analyze and extract to help doctors diagnose. In the process of achieving this goal, The biggest bottleneck is that traditional rigid inorganic integrated devices cannot be closely adhered to and integrated with human flexible tissue, and thus cannot be accurately monitored.The birth of flexible pressure sensors helps to change this situation.
Professor Someya in 2003 For the first time, semiconductor polymers are used for pressure sensor devices, but at this time, flexible pressure sensors have problems such as low sensitivity, low minimum pressure response threshold, and slow response speed. In order to climb over these three mountains, many teams are following I have been investing in research for several years and have made many breakthroughs in these three areas.
In 2014, Nanjing University controlled the micro-nanostructure of the film through interface doping polymer.Increase the sensitivity of the flexible pressure sensor up to 133 kPa-1, the pressure response threshold as low as 0.8Pa, and the response time to be less than 47 ms. The study was cited and evaluated by the University of Tokyo's Takao Someya in the Nature&Materials paper for the highest sensitivity.