We have investigated the kinetics of the diffusion-limited aggregation of colloidal silica with low-angle elastic light scattering at 31 scattering angles covering the wave vector range 3.7 ƃ 102 cm-1 <q<3.3 ƃ 104 cm-1. We have studied both the asymptotic behaviour at larger q, which provides a measure of the clusters fractal dimension, as well as the roll-off region at small q, which gives information on the clusters size. Each set of data (scattered intensity vs. q vectors) has been analysed by means of a nonlinear iterative inversion scheme to provide the value of the number average gyration radius ⟨R⟩n which is found to grow in time with a power law tα. The exponent (average over a few runs) is α = 0.58 ± 0.02, consistent with the theoretical expectations. © 1988 IOP Publishing Ltd.

Low angle elastic light scattering study of diffusion limited aggregation

FERRI, FABIO;
1988

Abstract

We have investigated the kinetics of the diffusion-limited aggregation of colloidal silica with low-angle elastic light scattering at 31 scattering angles covering the wave vector range 3.7 ƃ 102 cm-1
Ferri, Fabio; M., Giglio; E. PAGANINI AND U., Perini
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11383/15109
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