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According to an article published in the February 14 issue of Nature, the research team of the famous materials scientist Wang Zhonglin made another breakthrough in the field of nano-power generation after developing DC nano-generators last year and last year: by growing on elastic fibers. Zinc oxide nanowires, which successfully convert low frequency vibrations of fibers into electrical energy.
Wang Zhonglin is the overseas director of the National Nano Center and a director of the Georgia Institute of Technology. Since 2006, Wang Zhonglin has invented nano-generators and DC generators. In 2006 he first proposed the concept and new research field of Piezotronics. Due to the unique semiconductor and piezoelectric properties of zinc oxide, curved zinc oxide nanowires can produce a positive potential on one side of the stretch and a negative potential on the compressed side. The Schottky barrier between the zinc oxide semiconductor and the metal electrode controls the accumulation and release of charge, thereby realizing the conversion of mechanical energy to electrical energy and effective release.
At the beginning of 2007, based on the principle of piezoelectric electronics, Wang Zhonglin's research group used ultrasonic to drive the movement of nanowire arrays, and developed a nanogenerator model that can independently absorb mechanical energy from the outside and convert it into electrical energy. Under the influence of ultrasound, this nano-generator has been able to generate hundreds of nanoamperes of current. However, Wang Zhonglin said that the current output of the nano-generator consisting of two fibers is still small, mainly due to the large internal resistance of the fiber and the small contact area between the fibers. Currently, they are working to increase the output energy of this fiber-based nanogenerator. For example, by pre-plating a layer of conductive material on the fiber and then growing the zinc oxide nanowire, the internal resistance of the nanogenerator can be significantly reduced, thereby increasing the output current of the fiber-based nanogenerator; it can also be increased by increasing the number of fibers. The output energy of the nanogenerator.
The reviewer of the article said: "This is a very creative and groundbreaking study... The author's thinking is revolutionary." Wang Zhonglin believes that the new results will be nano-generators in biotechnology, Applications in the fields of nanodevices, personal portable electronic devices, and defense technology have opened up a wider space.
"Today, nanotechnology has developed from the early research on the structure and basic physicochemical properties of nanomaterials to the use of the excellent properties of nanomaterials to purposefully manufacture nanodevices, and various nanodevices have been manufactured, such as nanosensors. "Nano-motors and even nano-robots," Wang Zhonglin said. "But at the same time, traditional micro-power supplies, such as batteries, are still providing energy for these miniaturized and integrated nano-devices. Therefore, there is an urgent need to develop nano-scale power systems. , providing basic energy for further miniaturization and integration of nano devices."
At present, there are already many international authoritative news media such as BBC, NBC, PBS, National Geographic and other important scientific achievements.
Chinese scientists have developed fiber nanogenerators
Editor's note: The research team led by Professor Wang Zhonglin, a nanotechnology expert in the Department of Materials Science and Engineering at Georgia Institute of Technology, recently invented a new type of fiber that can use electricity to generate electricity. This is a fiber nanogenerator, which was developed the year before last year and last year. After the DC nanogenerator, Chinese scientists once again invented.