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. 2019 Sep 11;14:311. doi: 10.1186/s11671-019-3144-2

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 5 — Application of the 2DW-WTNG. a Rectification circuit with two branch circuits at the output terminal. b Rectified output current signal. The inset is an optical image of a red LED powered by the rectified current signal. c Charging curve for a 0.47 μF commercial capacitor charged by the rectified current. The insert is the corresponding output charges stored in the capacitor. d Output current of the 2DW-WTNG working continuously for 12 h. e Output current of the 2DW-WTNG working in two different working modes, demonstrating the versatility of the 2DW-WTNG in scavenging human body motion energy. The working process is shown in the insert