Fig. 11.

3D graphene materials with other polymer porous materials as templates used for tactile sensing. a Photograph of both electrodes on a brachioradialis muscle and on biceps brachii muscle for electromyogram measurement. Reproduced with permission from Ref. [88]. Copyright 2017 WILEY–VCH Verlag GmbH & Co. KGaA, Weinheim. b Experimental setup of the tuning fork vibration test and a schematic of the test circuit for the graphene film/PDMS sensor. c Photo of the piezoelectric ceramic transducer test. Reproduced with permission from Ref. [92]. Copyright 2017 AIP Publishing