NDLI: A novel optoelectronic tweezer using light induced dielectrophoresis

Content Provider	IEEE Xplore Digital Library
Author	Pei Yu Chiou Zehao Chang Wu, M.C.
Copyright Year	2003
Description	Author affiliation: Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA (Pei Yu Chiou; Zehao Chang; Wu, M.C.)
Abstract	We demonstrate a novel optoelectronic tweezer using light induced dielectrophoresis mechanism to optically trap and transport micro particles with optical power in the /spl mu/W range. This device consists of two pattern-less surfaces: a bottom glass substrate coated with photoconductive material and a top transparent indium-tin-oxide (ITO) glass. To achieve optical trapping, we sandwich the liquid-immersed micro particles between these two surfaces and supply an ac electric bias. A 633-nm He-Ne laser focused by a 40x objective lens is used to transport the particles. Negative dielectrophoretic trapping is demonstrated in this paper. Our experiment results show that optical beam with power as low as 1 /spl mu/W is sufficient to transport 25-/spl mu/m-diameter latex particles at a speed of 4.5 /spl mu/m/sec. The transport speed increases with higher optical power. A maximum speed of 397 /spl mu/m/sec is observed at 100 /spl mu/W.
Starting Page	8
Ending Page	9
File Size	245695
Page Count	2
File Format	PDF
ISBN	078037830X
DOI	10.1109/OMEMS.2003.1233441
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-08-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dielectrophoresis Biomedical optical imaging Electric fields Glass Optical polymers Photoconducting materials Charge carrier processes Optical surface waves Indium tin oxide Electromagnetic wave absorption
Content Type	Text
Resource Type	Article

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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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