Zinc Oxide Nanostructures

111

mechanical energy input source must be eliminated and the power

generation can be achieved in a large scale of NWs. All of the NWs

are required to generate electricity simultaneously and all the

electricity can be collected and output effectively. The mechanical

deformation needs to be provided in a form of wave from the

environment, so the nanogenerator can work independently and

wirelessly. The direct current (DC) nanogenerator demonstrated

here shows an innovative approach that uses ultrasonic wave to

agitate and input mechanical deformation on ZnO NW arrays [9].

The design has the potential to satisfy all the requirements outlined

abov ...