Dynamic Light Scattering

Abstract

Dynamic light scattering(DLS) particle sizing characterizes the temporal structure of particles' Brownian motion in liquid suspension, which carries critical information about the size of the particles. By measuring the temporal structure instead of angular distribution, DLS is able to measure particles as small as a few nanometers, much smaller than the wavelength of light used. Accordingly, the core components of DLS hardware are a high-quality photon counting device and a digital autocorrelator. Advanced algorithms developed to perform inverse Laplace transformations process the autocorrelation spectra to acquire the desired sizing information.