E-skins applied in robotics. (a) Output of the e-skin developed by Zhong Lin Wang and co-workers in 2018 for the grasping and dropping of an object by a soft gripper [40] (Copyright © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany). (b) Output of the e-skin developed by Zhengchun Peng and co-workers in 2019, worn in a humanoid robotic hand, for the grasping and dropping of an object (SPS), compared to the performance of a commercial sensor (FSR 400) [144] (Copyright © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany). (c) Output of the e-skin developed by Vellaisamy Roy in 2019, attached to a robotic arm, when grasping and releasing objects with different weights [170] (Copyright © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany).