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Magnetic fluid particle sizing by coherent light scattering. Computer simulation results

D. CHICEA1,*

Affiliation

  1. Physics Department, University Lucian Blaga of Sibiu, Dr. Ion Ratiu Str. 7-9, Sibiu, 550012, Romania

Abstract

Magnetic fluids are suspensions of nano to micrometer sized magnetic particles in liquids that act as scattering centers when light passes through the medium. If coherent light is incident the result of the far field interference is a “speckled” image. In a suspension the SCs have a complex movement of both sedimentation and the Brownian motion. As a result of the SCs permanent position changes the speckle image is not static but presents time fluctuations. A computer code to simulate the dynamics of the coherent light scattering on magnetic fluid was written, tested and used to calculate the far field intensity variation for nanofluids having different particle size. The results are discussed and an experimental method for fast nanoparticle size assessing is suggested..

Keywords

Suspensions, Computer simulation, Image processing, Biospeckles.

Submitted at: Sept. 25, 2007
Accepted at: Feb. 18, 2008

Citation

D. CHICEA, Magnetic fluid particle sizing by coherent light scattering. Computer simulation results, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 264-268 (2008)