A compact photon-correlation spectrometer for research and education |
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| Authors: | I K Yudin G L Nikolaenko V I Kosov V A Agayan M A Anisimov J V Sengers |
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| Affiliation: | (1) Laboratory for Phase Transitions and Critical Phenomena, Oil & Gas Research Institute of the Russian Academy of Sciences, 117917 Moscow, Russia;(2) Institute for Physical Science and Technology, University of Maryland, 20742 College Park, Maryland, USA;(3) Department of Chemical Engineering, University of Maryland, 20742 College Park, Maryland, USA |
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| Abstract: | A compact photon-correlation spectrometer for basic and applied research in physics, chemistry, biology, medicine, engineering,
and environmental technology as well as for educational laboratory courses in these subjects has been developed. The instrumental
setup enables one to make absolute measurements of the sizes of particles suspended in liquids in the range from 0.001 to
5 μm. The measurements are fast, lasting usually from seconds to several minutes. Real-time size monitoring, such as of kinetic
aggregation processes, is also possible. The optical arrangement of the spectrometer even makes it possible to measure light
scattering in opaque systems which are characterized by strong light absorption. The quantity of the sample to be studied
can be quite small, starting from 0.01 cm3. The system includes specially designed software for performing data interpretation and for implementing fitting procedures,
for exchange of data with other programs, and for automation of measurements of long duration or of sequences of measurements.
Measurements verifying the accuracy of the system are presented for latex suspensions, for aniline dye dissolved in water,
and for dilute solutions of polystyrene in toluene. |
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| Keywords: | diffusion light scattering liquid mixtures particle sizes photon-correlation spectroscopy viscosity |
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