Fig. 1: Design of the all PDMS-CNTs-based flexible pressure sensor.

a Conventional sensors or e-skins have non-bonded interfaces and exhibit significant mechanical mismatch between layers. b Delamination readily occurs in conventional sensors upon loading. c The all-PDMS-CNTs-based sensor has bonded interfaces and exhibits mechanical match between layers. d Interfaces in the all-PDMS-CNTs sensor remains stable under loading. e Infiltration by monomers and crosslinkers of PDMS, dissolved in an organic solvent, into the polymer networks of the electrodes and the dielectric layer. f The swollen electrodes and dielectric layer are integrated together before curing the infiltrated monomers and crosslinkers. g After curing, an interlink PDMS network forms at each interface between an electrode and the dielectric layer, in topological entanglement with the two adherend PDMS networks, resulting in robust electrode-dielectric layer interfaces. h Cross-section SEM images of the sensor, showing seamlessly interlinked interfaces between different layers.