A research team at the National Institute of Science and Technology (UNIST) in Ulsan, South Korea, has created a new array of sensors that can detect a wide range of pressures, from body weight to finger touch.
Currently, most transistor fabrications use silicon channels and silicon oxide based dielectrics. However, these transistors are usually not flexible or flexible enough to be a major obstacle to making highly integrated pressure sensor arrays and transparent pressure sensors.
The new array technology developed by UNIST researchers is promising because it generates electrical signals based on the detected touch action, and displays the position and pressure of the detected object, as well as the traditional pressure sensor. More transparency and lower power consumption, which is different from the touch sensors currently used for graphics.
Jang-Ung Park, a professor at the UNIST Materials and Engineering Research Institute, led the research team to conduct this study using highly conductive, transparent graphene with an air dielectric layer and the ability to draw air on one side of the foldable substrate. Elastomer.
The array is capable of detecting the sliding, light touch and finger pressure that causes the dielectric gap to deform, providing a means of measuring the magnitude and position of the pressure. Furthermore, this new array consumes less power and reacts faster than passive matrix types.
Park said: "Using air as a dielectric layer for generating field effect transistors (FETs) can significantly improve transistor performance because of the clean interface between the graphene channel and the air. In addition, the thickness of this air dielectric layer is The pressure is applied, so through this technology, the pressure change can be detected more effectively."
This sensor can simultaneously measure any object less than 10 kPa, such as tapping to more than 2 MPa, the weight of the human body, etc. In addition, it can also be applied to 3D touch panels or jogging shoes. The results of this study have been published in the latest issue of the journal Nature CommunicaTIons.
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