NDLI: AC electroosmotic microconcentrator using a face-to-face, asymmetric electrode pair with expanded sections in the bottom electrode

Content Provider	Springer Nature Link
Author	Chen, Jheng Huang Lee, Yan Chang Hsieh, Wen Hsin
Copyright Year	2016
Abstract	An AC electroosmotic (AC-EO) microconcentrator using a face-to-face, asymmetric electrode pair with expanded sections in the bottom electrode is proposed in this study. The electrode pair of the AC-EO microconcentrator is composed of a larger top electrode (30 mm × 60 mm) and a bottom electrode (containing three slim electrodes and a triangular electrode). In the expanded section at the connection of a slim electrode and the triangular electrode, an electroosmosis flow transports test samples far away from the triangular electrode to the stagnation zone inside the triangular electrode through the slim electrode for concentration. On the three sides of the triangular electrode, vortices bring test samples surrounding the triangular electrode to the stagnation zone. By these two electroosmosis flow fields, the microconcentrator can concentrate test samples near and far from the triangular electrode to its central area, achieving a highly efficient sample concentration. The measured concentration distribution in the vertical electrode direction by confocal microscopy indicates that the concentration process occurs above the electrode surface. The capability of the proposed AC-EO concentrator in the repeated concentration and release of test samples is verified by a reversible switch test. The performance of the proposed AC-EO concentrator in concentrating latex particles and T4 GT7 DNA is better than those reported in the literature under similar average electric field strength. The fluorescence enhancement factor is 3.9–9.1 times better when concentrating latex particles, and the concentration enhance factor is 1.4–5.7 times better when concentrating T4 GT7 DNA.
Starting Page	1
Ending Page	16
Page Count	16
File Format	PDF
ISSN	16134982
Journal	Microfluidics and Nanofluidics
Volume Number	20
Issue Number	5
e-ISSN	16134990
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-04-25
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Soft lithography AC electroosmotic flow Microconcentrator Asymmetric electrode pair Fluorescence enhancement factor Concentration enhancement factor Engineering Fluid Dynamics Biomedical Engineering Analytical Chemistry Nanotechnology and Microengineering
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Materials Chemistry Condensed Matter Physics Electronic, Optical and Magnetic Materials

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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