Static Light Scattering (SLS)
When light strikes particles, scattering (diffraction) occurs. Detectors can receive different electrical signals according to the intensity and angles of scattered light. And sample size distribution is calculated from these electrical signals based on Mie theory. Light scattering method has excellent reproducibility and accuracy.
Dynamic Light Scattering (DLS)
Dynamic Light Scattering is the measurement of fluctuations in scattered light intensity with time. These fluctuations in intensity are due to the random Brownian motion of the nanoparticle. Since larger particles diffuse more slowly than small particles, one can readily relate particle size to measured fluctuations in light scattering intensity. With modern instruments, the technique is rapid and reliable.
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