Wang Zhong Lin, Song Jinhui
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
Science. 2006 Apr 14;312(5771):242-6. doi: 10.1126/science.1124005.
We have converted nanoscale mechanical energy into electrical energy by means of piezoelectric zinc oxide nanowire (NW) arrays. The aligned NWs are deflected with a conductive atomic force microscope tip in contact mode. The coupling of piezoelectric and semiconducting properties in zinc oxide creates a strain field and charge separation across the NW as a result of its bending. The rectifying characteristic of the Schottky barrier formed between the metal tip and the NW leads to electrical current generation. The efficiency of the NW-based piezoelectric power generator is estimated to be 17 to 30%. This approach has the potential of converting mechanical, vibrational, and/or hydraulic energy into electricity for powering nanodevices.
我们通过压电氧化锌纳米线（NW）阵列将纳米级机械能转化为电能。排列好的纳米线在接触模式下被导电原子力显微镜尖端偏转。氧化锌中压电和半导体特性的耦合由于纳米线的弯曲而在其内部产生应变场并导致电荷分离。金属尖端与纳米线之间形成的肖特基势垒的整流特性导致了电流的产生。基于纳米线的压电发电机的效率估计为17%至30%。这种方法具有将机械、振动和/或液压能转化为电能以为纳米器件供电的潜力。
