Parallel heterodyne detection of dynamic light scattering spectra from gold nanoparticles diffusing in viscous fluids

We developed a microscope intended to probe, using a parallel heterodyne receiver, the fluctuation spectrum of light quasi-elastically scattered by gold nanoparticles diffusing in viscous fluids. The cutoff frequencies of the recorded spectra scale up linearly with those expected from single scatter...

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Bibliographic Details
Published in:arXiv.org 2010-03
Main Authors: Atlan, Michael, Desbiolles, Pierre, Gross, Michel, Coppey-Moisan, Maite
Format: Article
Language:English
Subjects:
Fluid dynamics
Gold
Nanoparticles
Photon correlation spectroscopy
Scattering
Variations
Viscous fluids
Online Access:Get full text
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Summary:We developed a microscope intended to probe, using a parallel heterodyne receiver, the fluctuation spectrum of light quasi-elastically scattered by gold nanoparticles diffusing in viscous fluids. The cutoff frequencies of the recorded spectra scale up linearly with those expected from single scattering formalism in a wide range of dynamic viscosities (1 to 15 times water viscosity at room temperature). Our scheme enables ensemble-averaged optical fluctuations measurements over multispeckle recordings in low light, at temporal frequencies up to 10 kHz, with a 12 Hz framerate array detector.
ISSN:2331-8422
DOI:10.48550/arxiv.1003.5065