Method and system for dispersion measurements Universiteit Gent
Aside from size measurements, we also realized that it would be possible to calculate number concentrations (i.e. the number of particles per unit of volume) from the same SPT experiments. Indeed, intuitively one can understand that the number of observed particle trajectories must be proportional to the concentration of particles in the dispersion. However, an accurate calculation is not evident since a 'sampling bias effect' is introduced due to the fact that particles are only visible when entering the focal plane of the microscope. As a result, small and fast moving particles will appear ...