Efficient Microfluidic Power Generator Based on Interaction between DI Water and Hydrophobic-Channel Surface
- Efficient Microfluidic Power Generator Based on Interaction between DI Water and Hydrophobic-Channel Surface
- 전명석; 최용환; 장세근; 김상문; 최만수
- Streaming potential; Hydrophobic surface; Intrinsic charge; Microfluidics; Electrokinetics
- Issue Date
- International Journal of Precision Engineering and Manufacturing-Green Technology
- VOL 5, NO 2-260
- 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.
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