Abstract
A computer-based dynamic light scattering instrument with a time interval digitizer has been constructed for the study of the dynamics of polymers in solution. The photon counting scheme is basically the same as that developed by Matsumoto et al. [Rev. Sci. Instrum., 47, 861 (1976)] but has been refined by the incorporation of a new interface with DMA to reduce the dead time to 310 ns. The total number of channels is as many as 512. Our instrument allows for an accurate measurement of the intensity autocorrelation function for very weak scatterers at six discrete scattering angles from 10° to 150°, and makes possible determination of the translational diffusion coefficients of polystyrene-latex particles in water within an accuracy of one percent. Its capability is also demonstrated in measurements on dilute benzene solutions of narrow-distribution polystyrene as well as aqueous suspensions of mixtures of PS-latex particles.
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Nemoto, N., Tsunashima, Y. & Kurata, M. Dynamic Light Scattering Instrument with a Time Interval Digitizer. Polym J 13, 827–836 (1981). https://doi.org/10.1295/polymj.13.827
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DOI: https://doi.org/10.1295/polymj.13.827
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