First there were colloids. These materials found applications in paints, cosmetics, pharmaceuticals, and more. Now there are nanoparticles. Nanoparticles have driven advances in materials science, medicine, and chemistry. Analyzing these materials for size has been critical to fully exploiting their potential. This webinar introduces the dominant technique for nanoparticle size analysis: dynamic light scattering (DLS). Topics include how does DLS works, how to make good measurements, and the advantages of using DLS.