Direct-Current Nanogenerator Driven by Ultrasonic Waves

We have developed a nanowire nanogenerator that is driven by an ultrasonic wave to produce continuous direct-current output. The nanogenerator was fabricated with vertically aligned zinc oxide nanowire arrays that were placed beneath a zigzag metal electrode with a small gap. The wave drives the ele...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2007-04, Vol.316 (5821), p.102-105
Main Authors: Wang, Xudong, Song, Jinhui, Liu, Jin, Wang, Zhong Lin
Format: Article
Language:English
Subjects:
Acoustic wave devices, piezoelectric and piezoresistive devices
Applied sciences
Arrays
Contact resistance
Direct current
Electric Conductivity
Electric current
Electric potential
Electrical and electronic components, instruments and techniques
Electricity
Electrodes
Electronics
Energy
Exact sciences and technology
Generators
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Joining
Microelectrodes
Nanocomposites
Nanomaterials
Nanostructure
Nanotechnology
Nanowires
Other techniques and industries
Physics
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Ultrasonic radiation
Ultrasonic technology
Ultrasonics
Vibration
Zinc Oxide
Zinc oxides
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Summary:We have developed a nanowire nanogenerator that is driven by an ultrasonic wave to produce continuous direct-current output. The nanogenerator was fabricated with vertically aligned zinc oxide nanowire arrays that were placed beneath a zigzag metal electrode with a small gap. The wave drives the electrode up and down to bend and/or vibrate the nanowires. A piezoelectric-semiconducting coupling process converts mechanical energy into electricity. The zigzag electrode acts as an array of parallel integrated metal tips that simultaneously and continuously create, collect, and output electricity from all of the nanowires. The approach presents an adaptable, mobile, and cost-effective technology for harvesting energy from the environment, and it offers a potential solution for powering nanodevices and nanosystems.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1139366