David A. Weitz
He is best known for his work in the areas of diffusing-wave spectroscopy , microrheology , microfluidics , rheology , fluid mechanics , interface and colloid science , colloid chemistry , biophysics , complex fluids , soft condensed matter physics , phase transitions , the study of glass and amorphous solids , liquid crystals , self-assembly , surface-enhanced light scattering , and diffusion-limited aggregation . 
<triplet> colloid chemistry <subj> interface and colloid science <obj> studied by