Size Distributions of Rigid Colloids from Transient Birefringence Data
A log-linear analysis of the transient electric briefringence relaxation data for a polydisperse colloidal dispersion yields a curved plot which is due to contributions from the individual relaxation processes of each size species within the continuous size distribution. The initial slopes of such plots under two specific experimental conditions, namely high frequency, low field and saturation orientation, have been shown to give rise to discrete average rotational diffusion coefficients for the size distribution. Thus by measuring these two average parameters, it is possible to interpret them in terms of the two coefficients of standard two-parameter distribution functions thus characterising the full size distribution.
KeywordsPulse Electric Field Copper Phthalocyanine Rotational Diffusion Coefficient Permanent Electrical Dipole Moment Electric Birefringence
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