期刊
NANO LETTERS
卷 10, 期 12, 页码 5025-5031出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl103203u
关键词
Nanogenerator; ZnO; conical nanowire
类别
资金
- DARPA [HR0011-09-C-0142]
- Airforce BES DOE [DE-FG02 07ER46394]
- NSF [CMMI 0403671]
We present a simple, cost-effective, robust, and scalable approach for fabricating a nanogenerator that gives an output power strong enough to continuously drive a commercial liquid crystal display. Utilizing the conical shape of the as-grown ZnO nanowires, a nanogenerator is fabricated by simply dispersing them onto a flat polymer film to form a rational composite structure. It is suggested that the geometry induced unipolar assembly of the conical nano-wires in such a composite structure results in a macroscopic piezoelectric potential across its thickness by introducing a mechanical deformation, which may be responsible for driving the flow of the inductive charges between the top and bottom electrodes. A compressive strain of 0.11 % at a straining rate of 3.67% s(-1) produces an output voltage up to 2 V (equivalent open circuit voltage of 3.3 V). This is a practical and versatile technology with the potential for powering small size personal electronics.
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