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:Optics letters 2010-03, Vol.35 (5), p.787-789
Main Authors: ATLAN, Michael, DESBIOLLES, Pierre, GROSS, Michel, COPPEY-MOISAN, Maïté
Format: Article
Language:English
Subjects:
Diffraction and scattering
Equipment Design
Equipment Failure Analysis
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Gold - chemistry
Light
Microscopy - instrumentation
Nanoparticles - chemistry
Nanoparticles - ultrastructure
Nephelometry and Turbidimetry - instrumentation
Optics
Physics
Scattering, Radiation
Solutions - chemistry
Spectrum Analysis, Raman - instrumentation
Viscosity
Wave optics
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Description
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:0146-9592
1539-4794
DOI:10.1364/ol.35.000787