Charge-pumping in a synthetic leaf for harvesting energy from evaporation-driven flows
Charge-pumping in a synthetic leaf for harvesting energy from evaporation-driven flows
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DOI：
10.1063/1.3157144
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发表时间：
2009-07-06
影响因子：
4
通讯作者：
Maharbiz, Michel M.
中科院分区：
文献类型：
--
作者：
Borno, Ruba T.;Steinmeyer, Joseph D.;Maharbiz, Michel M.
受植物中水分运输的启发，我们提出了一种合成的、微型制造的“叶子”，它可以从蒸发流中清除电能。器件表面的蒸发在蚀刻的微通道内产生速度高达1.5厘米/S的流动。通道内的气液界面以这种速度穿过嵌入的电容器，产生250毫秒、10-50 pF的电容瞬时变化。如果连接到整流电荷泵电路，每个电容式瞬变可以使100mF存储电容器中的电压增加约2-5mV。我们估计了功率密度、能量密度和扫气效率。(C)2009年美国物理研究所。[DOI：10.1063/1.3157144]
Inspired by water transport in plants, we present a synthetic, microfabricated "leaf" that can scavenge electrical power from evaporative flow. Evaporation at the surface of the device produces flows with velocities up to 1.5 cm/s within etched microchannels. Gas-liquid interfaces within the channels move across an embedded capacitor at this velocity, generating 250 ms, 10-50 pF transient changes in capacitance. If connected to a rectified charge-pump circuit, each capacitive transient can increase the voltage in a 100 mu F storage capacitor by similar to 2-5 mu V. We provide estimates of power density, energy density, and scavenging efficiency. (C) 2009 American Institute of Physics. [DOI:10.1063/1.3157144]