4.8 Article

Sensitivity-Photo-Patternable Ionic Pressure Sensor Array with a Wearable Measurement Unit

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出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c09341

关键词

pressure sensor; photo-pattern; capacitance measurement; ion gel; electrical double layer

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  1. Self-determined and Innovative Research Funds of Tianjin University

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The study presents a pressure sensor array with photo-patterned sensitivity, achieved through the synergistic creation of the photo-defined mechanical properties of the dielectric layer and the interfacial capacitive sensing mechanism. This design allows the sensitivity of each sensing pixel to be photo-defined over a magnitude range, and a wearable measurement unit is created to fulfill the need for mapping pressure distribution.
A flexible pressure sensor array provides more information than a single pressure sensor as electronic skin, and independently definable sensitivities of sensing pixels enable more accurate pressure measurements. However, the reported approaches, either changing the mold for the dielectric layer or tuning the dielectric properties, overcomplicate the manufacturing process for the devices. Here, we present a pressure sensor array with photo-patterned sensitivity, which is realized through the synergistic creation of the photo-defined mechanical properties of the dielectric layer and the interfacial capacitive sensing mechanism. Via this design, the sensitivity of each sensing pixel can be photo-defined over a range of & SIM;70 times of magnitude. Additionally, we created the first wearable measurement unit for the ionic pressure sensor array. The sensitivity-photo-patternable pressure sensor array and the wearable measurement unit fulfill the open need of mapping the pressure distribution over a broad range of magnitude, such as the plantar pressure.

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