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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 7 — Jul. 17, 2006

Nanoparticle size analysis with relaxation of induced grating by dielectrophoresis

Yukihisa Wada, Shinichiro Totoki, Masayuki Watanabe, Naoji Moriya, Yoshio Tsunazawa, and Shimaoka Haruo  »View Author Affiliations


Optics Express, Vol. 14, Issue 12, pp. 5755-5764 (2006)
http://dx.doi.org/10.1364/OE.14.005755


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Abstract

We propose an alternative approach to the use of dynamic light scattering (DLS) for the analysis of particle sizes ranging from 5 nm to 100 nm. This approach employs a combination of 1) diffusion, 2) density grating, and 3) dielectrophoresis (DEP), and measures the diffusion coefficient from the decay rate of the diffracted light intensity in the relaxation process of particle density modulation generated by DEP. Both the experiments and the theoretical analysis confirm the reliable determination of particle size independently of the refractive index. The new method records a decay signal directly without an autocorrelator and is expected to have a less extreme sensitivity dependence on particle size than DLS.

© 2006 Optical Society of America

OCIS Codes
(290.1990) Scattering : Diffusion
(350.4990) Other areas of optics : Particles

ToC Category:
Scattering

History
Original Manuscript: January 27, 2006
Revised Manuscript: May 12, 2006
Manuscript Accepted: May 16, 2006
Published: June 12, 2006

Virtual Issues
Vol. 1, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Yukihisa Wada, Shinichiro Totoki, Masayuki Watanabe, Naoji Moriya, Yoshio Tsunazawa, and Haruo Shimaoka, "Nanoparticle size analysis with relaxation of induced grating by dielectrophoresis," Opt. Express 14, 5755-5764 (2006)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-14-12-5755


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References

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