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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 11 — Oct. 21, 2009

Bulk-heterojunction polymers in optically-induced dielectrophoretic devices for the manipulation of microparticles

Wei Wang, Yen-Heng Lin, Ruei-Syuan Guan, Ten-Chin Wen, Tzung-Fang Guo, and Gwo-Bin Lee  »View Author Affiliations

Optics Express, Vol. 17, Issue 20, pp. 17603-17613 (2009)

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This paper presents a decent polymer material for fabricating optically-induced dielectrophoretic (ODEP) devices, which can manipulate microparticles or cells by using moving light patterns. A thin film of a bulk-heterojunction (BHJ) polymer, a mixture of regioregular poly(3-hexylthiophene) and [6,6]-phenyl C61-butyric acid methyl ester, is used as a light-activated layer. When illuminated by a projected light beam, the photo-induced charge carriers created by the electron transfer of excitons at a donor/acceptor interface in the BHJ layer, disturbs the uniformly-distributed electric field applied on the ODEP devices. A negative DEP force is then generated by virtual electrodes defined by the optical images from a computer-programmable projector to manipulate microparticles, thus providing a functionalized platform for particle manipulation. The effect of the polymer thickness and composition on the magnitude of the generated DEP force has been extensively investigated. The maximum particle drag velocity and the force applied on 20.0 μm diameter polystyrene beads are measured to be approximately 202.2 μm/s and 38.2 pN, respectively, for a device with a 497.3-nm thick BHJ layer. The lifetime of the developed device is also explored (~5 hours), which is sufficient for applications of disposable ODEP devices. Therefore, the BHJ polymer may provide a promising candidate for future ODEP devices capable of nanoparticle and cell manipulation.

© 2009 OSA

OCIS Codes
(250.2080) Optoelectronics : Polymer active devices
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: August 25, 2009
Revised Manuscript: September 8, 2009
Manuscript Accepted: September 10, 2009
Published: September 17, 2009

Virtual Issues
Vol. 4, Iss. 11 Virtual Journal for Biomedical Optics

Wei Wang, Yen-Heng Lin, Ruei-Syuan Guan, Ten-Chin Wen, Tzung-Fang Guo, and Gwo-Bin Lee, "Bulk-heterojunction polymers in optically-induced dielectrophoretic devices for the manipulation of microparticles," Opt. Express 17, 17603-17613 (2009)

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