Critical micellization temperature determination using multi-angle dynamic light scattering

Dynamic light scattering has been vastly explored as a tool for micelles characterization, not only for their size and stability, but also to determine the critical micellization concentration (CMC) and temperature (CMT)1-3. As a result of the unimers aggregation, as a function of the temperature for the case of this study, an increase in the scattered intensity is expected due to larger particles scattering substantially more photons. It’s been reported that for light-scattering techniques to be used reliably as CMC or CMT determination techniques, long correlation times are needed 1,4,5 which make this time-consuming and hence it’s not usually considered as a primary technique. We suggest in this application note, that DLS can be used in conjugation with other techniques to determine the CMT in a highly reproducible and time-efficient manner.

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