The lateral movements are also very small at 400 K, leaving the shape of the cluster almost unchanged during the aiMD simulation. At 800 K, the Ru atoms do show more movement, Figure , albeit still much less than for Cu and Co. During the simulation 7 Ru atoms move to the 2 nd layer. The atoms migrate during the full simulation time, with the final atom migrating at 14-15 ps. This atom does not stabilise on the 2 nd layer during the simulation time and might either stay on the top layer or return down to the lower. Even though increased temperature showed a small increase in the vertical movement of the Ru atoms, the cluster still stays predominantly 2D for all investigated temperatures and is not forming any island-like morphologies. Comparisons between morphology and the metals' binding energies to the substrate, as single atoms or as four atom clusters. also gives insight on how these affect the preferred morphology. The most important factor considered for the morphology promotion seems to be the binding energy for the metal to the substrate. The trend in increasing magnitude for the single atom binding energy from Cu to Co to Ru mirrors the observed transition from a preference of 3D morphology for Cu to 2D for Ru after aiMD simulations. The ratio between the metal clustering energy and metal-to-substrate interaction energy also correlates with the morphology preference. For the four atom Cu clusters the ratio is mostly unchanged between the rhombus and tetrahedron configuration, while for four atom Co and Ru, the ratio changes from interaction energy being the larger energy for the rhombus to the clustering being larger for the tetrahedron. Furthermore, the difference in stability between the different four atom clusters indicates the morphology preference. The difference in binding energy for the 3D tetrahedron and the 2D rhombus configurations were lowest for Cu, with even a small preference for the tetramer, while it was much larger for Co and Ru, with a preference for the rhombus. This aligns with the preference for Cu to form 3D structures, while Co and Ru takes 2D structures with horizontal growth.