Simplified Ground-type Single-plate Electrowetting Device for Droplet Transport
- Authors
- Chang, Jong-Hyeon; Kim, Dong-Sik; Pak, James Jungho
- Issue Date
- 5월-2011
- Publisher
- KOREAN INST ELECTR ENG
- Keywords
- Electrowetting; Digital microfluidics; Droplet transport; Single-plate configuration
- Citation
- JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY, v.6, no.3, pp.402 - 407
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
- Volume
- 6
- Number
- 3
- Start Page
- 402
- End Page
- 407
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112498
- DOI
- 10.5370/JEET.2011.6.3.402
- ISSN
- 1975-0102
- Abstract
- The current paper describes a simpler ground-type, single-plate electrowetting configuration for droplet transport in digital microfluidics without performance degradation. The simplified fabrication process is achieved with two photolithography steps. The first step simultaneously patterns both a control electrode array and a reference electrode on a substrate. The second step patterns a dielectric layer at the top to expose the reference electrode for grounding the liquid droplet. In the experiment, a 5 mu m thick photo-imageable polyimide, with a 3.3 dielectric constant, is used as the dielectric layer. A 10 nm Teflon-AF is coated to obtain a hydrophobic surface with a high water advancing angle of 116 degrees and a small contact angle hysteresis of 5 degrees. The droplet movement of 1 mM methylene blue on this simplified device is successfully demonstrated at control voltages above the required 45 V to overcome the contact angle hysteresis.
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Collections - Graduate School > Department of Biomedical Sciences > 1. Journal Articles
- College of Engineering > School of Electrical Engineering > 1. Journal Articles
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