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Micro and Nano Systems Letters
Fig. 3 | Micro and Nano Systems Letters

Fig. 3

From: Wearable piezoresistive strain sensor based on graphene-coated three-dimensional micro-porous PDMS sponge

Fig. 3

Static water contact measurements performed on a bare and b graphene-coated PDMS sponge. c The water contact angle was 108 ± 1.7°, and 131 ± 2.5° on the surface of bare and graphene-coated PDMS sponge, respectively. The water contact angle was increased by the hydrophobic property of the PDMS and the enhanced roughened surface due to the porous structure and nanostructure

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