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Nature Communications

Nature Communications

IF: 14.7
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Triboelectric sensor with ultra-wide linear range based on water-containing elastomer and ion-rich interface

Published:6 December 2024 DOI: 10.1038/s41467-024-54980-x
Siyao Qin, Peng Yang, Zhaoqi Liu, Jun Hu, Ning Li, Liming Ding, Xiangyu Chen

Abstract

The incompatibility of the high sensitivity and wide linear range still restricts the further development of active sensors. Here we report a triboelectric pressure sensor based on water-containing triboelectric elastomer with gradient-based microchannels. Tiny amount of liquid is injected into the triboelectric elastomer and the pressure-induced water bridges can modulate the built-in electric field of the sensor, which enhance the signal linearity near the compression limit. Moreover, it has been found that liquid-solid contact electrification can be enhanced by triggering selective ionic transfer, while the prepared ion-rich interface in the microchannels boosts the sensitivity of the sensor. Hence, an ultra-wide linear range (5?kPa–1240?kPa) with a sensitivity of 0.023?V?kPa?1 can be achieved, which is so far the widest linear range of active sensors to our knowledge. Our work can promote the practical application of triboelectric sensors and provide new insights for other sensory devices.

Substances (3)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Potassium chloride 7447-40-7 KCl 1593 suppliers $6.00-$12480.00
Sodium fluoride 7681-49-4 FNa 564 suppliers $10.00-$11800.00
Ferric chloride 7705-08-0 Cl3Fe 537 suppliers $9.00-$2361.40

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