A flexible graphene pressure sensor with high sensitivity based on plasma-induced hydrophobic fabrics
Source abstract
Abstract
Graphene-based wearable piezoresistive sensors are considered promising flexible sensors because of their simple preparation process, convenient signal acquisition, and controllable working range. However, existing flexible graphene pressure sensors have problems, such as poor wear resistance, low sensitivity, and a narrow pressure measurement range. In this study, the influence of the lateral size of graphene on the performance of the device is compared and analyzed, and a piezoresistive sensor based on PDMS / LGOE @PET with high sensitivity and a wide detection range is reported. The use of large-sized graphene improves the conductivity of the fabric, and the external electric field induces the graphene to increase the pore structure and further improve conductivity. Finally, a gradient coating film with a hard upper layer and soft lower layer was obtained by plasma cross-linking, which improved the hydrophobic stability of the device. Experiments show that the sensor has a wide detection range (0–40 kPa), high sensitivity range (70.46[[EQUATION]]5.72 KPa -1), and good repeatability and hydrophobicity (static contact angle of 155.85°). In addition, the sensor not only is applicable to wearable detection for detecting physiological signals of a human body but also uses a 3×3 sensor array to detect the pressure distribution of objects of different shapes, demonstrating its application value in the field of underwater wearables and artificial electronic skin.
Source: openaire · Quality: candidate unverified · Source record ↗
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References (37)
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