**6.6 ZnO NRs-Gr/M hybrid architectures**

The ZnO nanorods (NRs) and graphene (Gr) (ZnO NRs-Gr/M) hybrid architectures fabricated in **Figure 18** [40] accommodated the flexural deformation without mechanical or electrical failure for bending radius below 0.8 cm under the repeated bending and releasing up to 100 times. Furthermore, the gas sensors can detect ethanol gas vapor at the ppm level with the sensitivity (resistance in air/resistance in target gas) as high as ∼9 for 10 ppm ethanol. The combination of 1D nanocrystals

and 2D Gr improves the performances of the sensors and also imposes additional mechanical functions to the devices.
