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      Direct-Current Nanogenerator Driven by Ultrasonic Waves

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      Science
      American Association for the Advancement of Science (AAAS)

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          Abstract

          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.

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          Author and article information

          Journal
          Science
          Science
          American Association for the Advancement of Science (AAAS)
          0036-8075
          1095-9203
          April 06 2007
          April 06 2007
          : 316
          : 5821
          : 102-105
          Article
          10.1126/science.1139366
          17412957
          f3de2a5b-1505-46e2-86bc-0f34a19e218b
          © 2007
          History

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