Recently, Professor Ren Tianling from the Department of Micronanotology at Tsinghua University published a paper entitled "Graphene-Paper Pressure Sensor for Detecting" at ACS Nano, Human Motions "), which has further enhanced the sensitivity of graphene paper pressure sensors. This achievement is of great significance for the development of flexible smart wearable sensors.
Flexible mechanical devices in recent years by the academic and industry widespread concern. Compared with traditional rigid substrate devices, flexible mechanics devices greatly improve the deformability of the device without sacrificing performance, so that it can adapt to more complex application scenarios, especially for wearable applications. Since it was discovered in 2004, graphene has been widely used in flexible mechanical devices due to its unique electrical and mechanical properties. Graphene mechanical devices have high sensitivity. However, the existing graphene mechanical sensors are faced with many problems, such as complex preparation processes, poor repeatability and consistency, and low yield, which are still far from practical application.
Graphene paper-based pressure sensor structure diagram, the device can effectively detect pulse, breathing and other physiological parameters
Professor Ren's team creatively proposed a new method for graphene-based paper-based pressure sensors that can convert multilayer mixed graphene oxide solutions and paper materials to multi-layer graphene sheets by means of thermal reduction. Utilizing the air channel between the graphene sheets and the unique microporous structure of the paper material, the graphene paper significantly changes the resistance value under pressure and thus greatly improves the detection sensitivity to the pressure. By selecting the appropriate type of graphene paper and paper layers, but also to further enhance the sensitivity of the pressure sensor. The device enables accurate detection of pulse, respiration, and multiple motor states in wearable applications. In addition, this new graphene paper-based device is also environmentally friendly, low cost, high flexibility and other outstanding advantages.
In recent years, Professor Ren is devoted to studying the limitations of breaking through traditional devices and laying the foundation for a new generation of micro / nano electronic devices. In particular, he focuses on the fundamental research and application of graphene sensors. In the field of novel graphene acoustic devices and various sensing devices A number of important innovations have been achieved such as flexible graphene sounder, smart graphene artificial throat, novel graphene resistive memory, spectrally tunable graphene light-emitting device, graphene bionic synaptic device, tunable graphene stress sensor , And the results were published in leading academic journals such as Nature Communications, Advanced Materials, Nano Letters, and ACS Nano .
Tao Luqi, a Ph.D. candidate in Department of Micronanoelectronics, Tsinghua University, is the first author of the article. Professor Ren Tianling and Associate Professor Yang Yi of Tsinghua University Department of Microelectronics and Electronics are the author of the paper. The research results have been supported by the National Natural Science Foundation of China and Ministry of Science and Technology projects.
Ventilation Fan,Exhaust Fan,Industrial Fan,Cooling Fan
Air Diffusers,Air Cooler Co., Ltd. , http://www.apg-heater.com
没有评论:
发表评论