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Sheets of silicone rubber embedded with liquid metal can sense pressure or touch because of changes in electrical resistivity resulting from changes in the channel dimensions induced by deformation. (a) Spiral-shaped channels and (b) serpentine-shaped channels for pressure sensing. (c) Strain gauges. (d) Liquid metal structures as small as 25 μm. Adapted with permission from ref (80). Copyright 2010 IOP Publishing.
