Diffusion of polyaromatic hydrocarbons on graphite:Impact of the molecular size on the diffusive behaviour.
The use of polyaromatic hydrocarbons (PAHs) as molecular skeletons in combination with chemical functionalisation leads to molecules of high interest for e.g. molecular electronics and the study of these building blocks and their interaction with graphitic materials is of fundamental importance. Molecular semiconductors, such as coronene and other aromatics, have been widely investigated during the last decades where they have been used to set up organic transistors, solar cells or information storage to mention only a few. In the past years we have performed a successful set of experiments on aromatic hydrocarbons from benzene to pyrene, where we have found behaviour that is close to an ideal 2D-gas. By adding coronene, a 6-ring aromatic molecule, we believe that we can finally obtain clear and unequivocal identification of the transition from Brownian to ballistic diffusion and find a conclusive proof for our 2D rough hard disk diffusion model.
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FOUQUET Peter; KOZA Michael Marek and TAMTOEGL Anton. (2017). Diffusion of polyaromatic hydrocarbons on graphite:Impact of the molecular size on the diffusive behaviour.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-05-472
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