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Harvesting Electricity from Water Evaporation through Microchannels of Natural Wood

When external pressure drives an electrolyte solution in a capillary tube with a charged inner surface, we obtain a streaming potential/current. This effect is also manifested when water flows through the microchannels of a tree, which is driven by capillary pressure and natural evaporation. Thus, b...

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Published in:ACS applied materials & interfaces 2020-03, Vol.12 (9), p.11232-11239
Main Authors: Zhou, Xiaobing, Zhang, Wenluan, Zhang, Chenglin, Tan, Yao, Guo, Junchang, Sun, Zhengnan, Deng, Xu
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cited_by cdi_FETCH-LOGICAL-a363t-f55c9b66ddca579a77ffaab643058c52e76273b8ac2b9493cfb0eb15939ff6343
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container_end_page 11239
container_issue 9
container_start_page 11232
container_title ACS applied materials & interfaces
container_volume 12
creator Zhou, Xiaobing
Zhang, Wenluan
Zhang, Chenglin
Tan, Yao
Guo, Junchang
Sun, Zhengnan
Deng, Xu
description When external pressure drives an electrolyte solution in a capillary tube with a charged inner surface, we obtain a streaming potential/current. This effect is also manifested when water flows through the microchannels of a tree, which is driven by capillary pressure and natural evaporation. Thus, by making use of natural evaporation, we took advantage of the anisotropic three-dimensional wood structures to fabricate nanogenerators drawing electricity from the streaming potential/current. As a result, direct current can be harvested continuously, simply through a piece of wood. A 300 mV open-circuit voltage and a 10 μA short-circuit current (I SC) were recorded from a single device, which surpassed the I SC values of most previous works by an order. By connecting five wood nanogenerators in series, a calculator can be completely functional, as a demonstration for practical application.
doi_str_mv 10.1021/acsami.9b23380
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title Harvesting Electricity from Water Evaporation through Microchannels of Natural Wood
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