LI 0.8 6-0.7 O u- 0.6 Ti 0.5 8 0.4 05 ti 1.0 1.6 2.0 2.6 30 Capacitance (pF) and a strain gauge that uses electrical y conductive silicone (CPDMS; right). (D) Image of an array of microscale AlInGaP LEDs and photodetectors, in an in- terconnected array integrated on skin, under compressive def