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Charles Lieber, a professor of international nanotechnology and a professor at Harvard University, said, "This work is extremely exciting. It proposes a solution to a key issue in nanotechnology, which is how to power the nanodevices invented by many research groups. Professor Wang used his first zinc oxide nanowires to convert mechanical energy into electrical energy, and he showed great creativity on this issue."
Because of its unique advantages such as small size, low power consumption, and responsiveness, nanodevices have always been the research field at the forefront of nano-academics. To truly make these tiny devices work, they must be input with electrical energy. The nanodevice of the power supply is the true nanosystem. Most of the previous research focused on the nanodevice itself, but did not consider the problem of its input power.
Power generation requires energy, and people generate energy when they walk and breathe. Can they convert the energy produced by the body into the energy needed for nanodevices? Professor Wang Zhonglin thought of this idea. He said: "If there is a miniature device that can convert the biological energy in the living body into electrical energy, it is the most ideal thing to realize the miniaturization of the device and the power supply."
This idea was quickly put into practice. Using the unique properties of zinc oxide nanowires, Wang Zhonglin developed a nanogenerator that converts mechanical energy into electrical energy under an atomic force microscope. The power generation efficiency reaches 17%-30%, which perfectly realizes the nanoscale power generation function and is self-generated. Nanodevices lay the foundation for physics.
"This is the invention that I am most excited about in this research field for more than 10 years." Wang Zhonglin believes that it will certainly set off a wave of research on nano-power in the entire nano-disciplinary community.
Wang Zhonglin believes that nanogenerators will have a wide range of important Applications in biomedical, military, wireless communications and wireless sensing. He said: "This invention can integrate nanodevices to achieve a true nanosystem. It can collect mechanical energy, such as human body motion, muscle contraction, blood flow, etc.; vibration energy, such as energy generated by sound waves and ultrasound. Fluid energy, such as the energy produced by body fluid flow, blood flow, and arterial contraction, and converts this energy into electrical energy that is supplied to the nanodevice. The energy generated by this nanogenerator is sufficient to supply the nanodevice or system, thus allowing the nano Devices or nano-robots provide energy self-sufficiency."
Thin as hair but power generation, the world's smallest generator is born
The British "Science" magazine recently reported that Professor Wang Zhonglin, a professor at the Georgia Institute of Technology and overseas director of the National Nanoscience Center of China, successfully converted mechanical energy into electrical energy in the nanometer scale and developed the world's smallest zinc oxide nanowire generator.