Efficient Microfluidic Power Generator Based on Interaction between DI Water and Hydrophobic-Channel Surface

Title
Efficient Microfluidic Power Generator Based on Interaction between DI Water and Hydrophobic-Channel Surface
Authors
전명석최용환장세근김상문최만수
Keywords
Streaming potential; Hydrophobic surface; Intrinsic charge; Microfluidics; Electrokinetics
Issue Date
2018-04
Publisher
International Journal of Precision Engineering and Manufacturing-Green Technology
Citation
VOL 5, NO 2-260
Abstract
The fabrication of power generators utilized by streaming potential has been attracting profound interests for various applications such as wearable healthcare and self-powered micro/nano systems. So far, streaming potential has been generated by a charged channel wall and accumulated counter-ions. However, this approach is assumed as no-slip boundary condition, while the slippery channel wall is critical for high efficiency. Herein, we demonstrate a microfluidic power generator based on streaming potential that can be intrinsically charged at a hydrophobic channel wall. This charging mechanism has higher values of charge density and slip boundary condition. We have achieved output voltage of ~2.7 V and streaming conductance density of ~1.23 A/m2·bar with the channel that is ~2 μm high and ~3.5 μm wide. Our result is a promising step for obtaining low-cost, high efficient power-generators for micro/nano systems.
URI
http://pubs.kist.re.kr/handle/201004/67491
ISSN
2288-6206
Appears in Collections:
KIST Publication > Article
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