Holographic characterization of colloidal fractal aggregates.

Wang, Chen; Cheong, Fook Chiong; Ruffner, David B; Zhong, Xiao; Ward, Michael D; Grier, David G · Soft Matter · 2016

basic_science · Level V

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Abstract

In-line holographic microscopy images of micrometer-scale fractal aggregates can be interpreted with an effective-sphere model to obtain each aggregate's size and the population-averaged fractal dimension. We demonstrate this technique experimentally using model fractal clusters of polystyrene nanoparticles and fractal protein aggregates composed of bovine serum albumin and bovine pancreas insulin.