Aggregate mass distribution, F (normalized to unit area), for: (a) P, (b) PC, and (c) C porosity regimens. n indicates the number of monomers in a given aggregate, which is proportional to aggregate mass. Colors denote the distribution after n_coll collisions, with n_coll=0 indicating the initial distribution. Gray lines show fits of the form n^α, with the dotted line for the low-mass region and the solid line for the high-mass region.