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Open AccessFeature PaperReview

Self-Cleaning: From Bio-Inspired Surface Modification to MEMS/Microfluidics System Integration

Department of Electrical & Computer Engineering, University of Washington, Seattle, WA 98105, USA
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Author to whom correspondence should be addressed.
Micromachines 2019, 10(2), 101; https://doi.org/10.3390/mi10020101
Received: 26 November 2018 / Revised: 22 January 2019 / Accepted: 28 January 2019 / Published: 30 January 2019
(This article belongs to the Special Issue Microscale Surface Tension and Its Applications)
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Abstract

This review focuses on self-cleaning surfaces, from passive bio-inspired surface modification including superhydrophobic, superomniphobic, and superhydrophilic surfaces, to active micro-electro-mechanical systems (MEMS) and digital microfluidic systems. We describe models and designs for nature-inspired self-cleaning schemes as well as novel engineering approaches, and we discuss examples of how MEMS/microfluidic systems integrate with functional surfaces to dislodge dust or undesired liquid residues. Meanwhile, we also examine “waterless” surface cleaning systems including electrodynamic screens and gecko seta-inspired tapes. The paper summarizes the state of the art in self-cleaning surfaces, introduces available cleaning mechanisms, describes established fabrication processes and provides practical application examples. View Full-Text
Keywords: self-cleaning surface; superhydrophobic; superhydrophilic; superomniphobic; microfluidics; electrodynamic screen; gecko setae self-cleaning surface; superhydrophobic; superhydrophilic; superomniphobic; microfluidics; electrodynamic screen; gecko setae
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sun, D.; Böhringer, K.F. Self-Cleaning: From Bio-Inspired Surface Modification to MEMS/Microfluidics System Integration. Micromachines 2019, 10, 101.

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