Laser scattering technology refers to the method of using laser as a light source to obtain information on particle weight, size, distribution, and aggregation structure by detecting the intensity, frequency shift, and angle dependence of scattered light outside the direction of incident light. It has broad applications. As for the detection of nanomaterials, it mainly involves the detection of frequency shift and angle dependence. This scattering technique, also known as dynamic light scattering, quasi elastic light scattering, and photon correlation spectroscopy, is named after the properties of the measured parameters, the magnitude of energy transfer, and the principle of the measurement method.