Coalescence dynamics of size-selected gold (Au) clusters (each with nominal 923 atoms), on amorphous Si3N4 substrate at room temperature, has been studied via time-resolved transmission electron microscopy (TEM). We found that the clusters approached each other in two stages. In the first stage, the drift velocity was independent of the particle separation and could be attributed to beam-induced random motion. In the second stage, the clusters were found to jump into contact with a much higher final averaged speed. This is independent of beam dose rates and is attributed to the van der Waal attraction.
|Number of pages||4|
|Journal||Journal of Physics: Conf Series|
|Publication status||Published - 16 Oct 2017|
|Event||Electron Microscopy and Analysis Group Conference 2017 - Manchester, United Kingdom|
Duration: 3 Jul 2017 → 6 Jul 2017