Measurements of the temperature dependent diffusion coefficient of nanoparticles in the range of 295–600 K at atmospheric pressure

The diffusion coefficient of WOx, Pt and NaCl particles in the diameter range of 3–84 nm was determined from the penetration of a set of wire screens in the temperature range of 295–600 K. The temperature dependence could be approximated well by a power law D∼TαD∼Tα, where α decreases from 1.7 to 1.55 with increasing particle diameter. This dependence differs significantly from the predictions of various correlations, and in particular the Cunningham–Millikan–Davies (CMD) correlation. A modification to the CMD correlation is suggested which includes temperature dependent empirical coefficients.