| 1 | Polymeric foams for flexible and highly sensitive low-pressure capacitive sensors显示文摘Flexible low-pressure sensors(<10 kPa)are required in areas as diverse as blood-pressure monitoring,human–computer interactions,robotics,and object detection.For applications,it is essential that these sensors combine flexibility,high sensitivity,robustness,and low production costs.Previous works involve surface micro-patterning,electronic amplification(OFET),and hydrogels.However,these solutions are limited as they involve complex processes,large bias voltages,large energy consumption,or are sensitive to evaporation.Here,we report a major advance to solve the challenge of scalable,efficient and robust e-skin.We present an unconventional capacitive sensor based on composite foam materials filled with conductive carbon black particles.Owing to the elastic buckling of the foam pores,the sensitivity exceeds 35 kPa^(−1) for pressure<0.2 kPa.These performances are one order of magnitude higher than the ones previously reported.These materials are low-cost,easy to prepare,and display high capacitance values,which are easy to measure using low-cost electronics.These materials pave the road for the implementation of e-skin in commercialized applications. | Mickaël Pruvost Wilbert J.Smit Cécile Monteux Philippe Poulin Annie Colin | 2019 | npj Flexible Electronics2019，3，1： | 5 |
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