Figure 16.

(a) Capacitance of a liquid metal sensor changes depending on the flow rate of medium. Reproduced with permission from [95]; published by MDPI, 2019. (b) Capacitance change due to proximity can be used to detect the distance differences. Reproduced with permission from [96]; published by MDPI, 2019. (c) Schematic of an EGaIn-based interdigitated capacitor with a microfluidic reservoir for sensing liquid- or gas-phase volatile organic compounds. Reproduced from Ref. [99] with permission from the Royal Society of Chemistry. (d) An inertial sensor using a liquid metal droplet can detect the motion by measuring capacitance change. Reproduced from Ref. [102] with permission from the Royal Society of Chemistry.