Abstract
Flexible sensors have attracted extensive attention because of their promising applications in the fields of health monitoring, intelligent robots, and electronic skin, etc. During the COVID-19 epidemic, noncontact control of public equipment such as elevators, game consoles, and doors has become particularly important, as it can effectively reduce the risk of cross-infection. In this work, a noncontact flexible temperature sensor is prepared via a simple dip-drying progress, in which poly(3,4-ethylenedioxythiophene):poly(4-styrene sulfonate) (PEDOT:PSS) and printer paper served as the sensing material and the flexible substrate, respectively. We combined the highly sensitive temperature-responsive property of PEDOT:PSS with the good hygroscopicity of printer paper. The prepared sensor shows high sensitivity and good stability in noncontact sensing mode within the temperature range of 20–50 °C. To prove the practicability of the noncontact temperature sensor, a 3 × 2 sensing array is prepared as a noncontact human-machine interface to realize the interaction between player and “Pound-A-Mole game” and a Bluetooth car. These two demos show the sensor′s ability to perceive nearby temperature changes, verifying its application potential as a noncontact human-machine interaction interface.
Highlights
The noncontact temperature-sensitive paper was prepared via an easy-to-operate dip-drying progress, in which the printer papers or polyethylene terephthalate (PET) film acted as the flexible substrate, and the PEDOT:PSS acted as temperature-sensitive material
The preprocessed printer papers and PET film were cut into a size of 10 mm × 20 mm, and one side of the printer papers was encapsulated with transparent adhesive tape, so that the solution could only be deposited on one side of the printer papers
The temperature-sensitive paper was prepared by a simple dip-drying progress as
Summary
Shiqi Chen 1,† , Xiaolong Han 2,† , Peng Hong 1 , Yue Zhang 1,3, * , Xiangyu Yin 3,4, * and Bingwei He 1,3. Shiqi Chen and Xiaolong Han contributed to this work
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