The particle size measured in DLS is usually larger than that measured in TEM, because DLS particle size distributions are intensity-based and also account for the solvent shell around the particles, whereas TEM provides number-based size distributions of the particles. This difference can also be observed here for all batches. However, it is notable that the dv and dn values (Figure )) are smaller than the mean particle size determined from TEM. This can be attributed to the width-error where a broad size distribution produced by DLS can yield a significantly underestimated dn when transformed from di. That is evident from Figure where the di distribution is broader for each batch as compared to the distribution that resulted from TEM.