Finally, for the "iodine oxyacid-amine" nucleation, we see the outgrowing clusters to be completely dominated by DMA (≥ 98%). This is caused by the relatively low binding free energy between IA and DMA (-7.1 kcal mol -1 ). The IsA and IA bonding (-9.8 kcal mol -1 ) is still stronger, however the minimum DMA concentrations (1 ppt∼10 7 cm -3 ) is several orders of magnitude higher than the IsA concentrations (maximum of 3 × 10 6 cm -3 ). In Tables and, it can be seen that increasing the IA concentration (or the corresponding oxide concentrations) from 1 × 10 6 cm -3 to 1 × 10 8 cm -3 does not fundamentally alter the nucleation mechanism. However, one can still observe a shift in the distribution allowing for an increased contribution from other clusters. This can most strongly be seen for the "oxyacid assisted oxide" nucleation at 283.15 K, where the major outgrowing clusters at an IA concentration of 10 6 cm -3 are (IP) 1 (IsA) 1 at 53% and (IT) 2 at 34% and a minor contribution from (IP) 1 (IT) 1 at 9%. This growth is primarily achieved through collision with IA, but with non-insignificant (>10%) contribution from collisions with the IT and IP. Increasing the concentration to 10 8 cm -3 , the major outgrowing cluster shift to (IP) 1 (IT) 1 at 30% together with (IP) 1 (IsA) 1 at 29%, with a minor component of (IT) 2 at 18%. The top three clusters at low concentrations account for 96% of the nucleation which decreases to 77% at higher concentrations. For the "oxyacid + mix" pathways, we only observe a slight shift in distributions, and for the "oxyacid" or "oxyacid + amines" the change is negligible. Likewise, a shift in distributions are observed for 263.15 K, but the same decrease in dominance of the top three outgrowing clusters is not observed, which could be caused by the increased stability at lower temperatures.