Table 2.

Summary of the four types of e-skin.

	Sensitivity	Response Time	Robust Cyclability	Strain Detection Range	Power Consumption	Cost	Ref.
Resistive	2.14 kPa−1	6.7 ms	2000	0.5%~250%	Low	Low	[85]
Capacitive	6.13 kPa−1	60 ms	12,000	0%~30%	Low	Low	[86]
Optical	1 mW cm−2	Fast	NA	0%~50%	High	High	[90]
Piezoelectric	9.4 × 10−3 kPa−1	5 ms	NA	NA	0	High	[91]