Highly-sensitive and highly-correlative flexible motion sensors based on asymmetric piezotronic effect

The table of contents entry: Here, for the first time, we describe a strategy to recognize the direction of bending as well as to measure the magnitude of the strain for realizing multi-functional, motion detection sensing devices. The operation mechanism is based on piezotronic effect using asymmetric polarization charges at the interface, which makes it possible to fabricate highly-sensitive two motion sensors. The two sets of measures show very high correlations (R2 = 0.98 and 0.96 under concave and convex bending, respectively) with very sensitive directional information.201