Charge-pumping in a synthetic leaf for harvesting energy from evaporation-driven flows

被引：32

作者：

Borno, Ruba T. ^{[1
]}

Steinmeyer, Joseph D. ^{[2
]}

Maharbiz, Michel M. ^{[3
]}

机构：

[1] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

[2] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[3] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 01期

关键词：

WATER;

D O I：

10.1063/1.3157144

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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]

引用

页数：3

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