K. Schatzel et Bj. Ackerson, DENSITY-FLUCTUATIONS DURING CRYSTALLIZATION OF COLLOIDS, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 48(5), 1993, pp. 3766-3777
Long-wavelength density fluctuations are recorded by small-angle light
scattering during the crystallization of hard colloidal spheres. Meas
ured structure factors show approximate scaling with a peak at finite
scattering vectors. The time dependences of the peak intensity and the
wave vector clearly reveal two different crystallization regimes. For
samples near melting density, we find diffusion limited growth at sma
ll times and Lifshitz-Slyozov ripening at large times. Growth exponent
s in the ripening process seem to increase for higher densities. All m
easurements demonstrate a strong coupling of the observed conserved de
nsity parameter to the nonconserved crystal-order parameter.