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High-Output Nanogenerator by Rational Unipolar Assembly of Conical Nanowires and Its Application for Driving a Small Liquid Crystal Display

by Youfan Hu, Yan Zhang, Chen Xu, Guang Zhu, and Zhong Lin Wang, Nano Letters , online–3155.

Abstract: 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.




Flexible High-Output Nanogenerator Based on Lateral ZnO Nanowire Array

by Guang Zhu, Rusen Yang, Sihong Wang, and Zhong Lin Wang, Nano Letters , 2010, 10, 3151–3155. (Supplementary Information)

Abstract: We report here a simple and effective approach, named scalable sweeping-printing-method, for fabricating flexible highoutput nanogenerator (HONG) that can effectively harvesting mechanical energy for driving a small commercial electronic component. The technique consists of two main steps. In the first step, the vertically aligned ZnO nanowires (NWs) are transferred to a receiving substrate to form horizontally aligned arrays. Then, parallel stripe type of electrodes are deposited to connect all of the NWs together. Using a single layer of HONG structure, an open-circuit voltage of up to 2.03 V and a peak output power density of 11 mW/cm3 have been achieved.


Self-powered nanowire devices

by Sheng Xu, Yong Qin, Chen Xu, Yaguang Wei, Rusen Yang and Zhong Lin Wang, Nature Nanotechnology , 2010, 5, 366-373. (Supplementary Information)

Abstract: The harvesting of mechanical energy from ambient sources could power electrical devices without the need for batteries. However, although the efficiency and durability of harvesting materials such as piezoelectric nanowires have steadily improved, the voltage and power produced by a single nanowire are insufficient for real devices. The integration of large numbers of nanowire energy harvesters into a single power source is therefore necessary, requiring alignment of the nanowires as well as synchronization of their charging and discharging processes. Here, we demonstrate the vertical and lateral integration of ZnO nanowires into arrays that are capable of producing sufficient power to operate real devices.


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