Transition from van-der-Waals to H Bonds dominated Interaction in n-Propanol physisorbed on Graphite

Details Transition from van-der-Waals to H Bonds dominated Interaction in n-Propanol physisorbed on Graphite Transition from van-der-Waals to H Bonds dominated Interaction in n-Propanol physisorbed on Graphite

2011-04-17

arxiv.org/abs/1104.3319v1

Physical Review Letters 106, 156103 (2011)

Physics

Chemical Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.106.156103

Multilayer sorption isotherms of 1-propanol on graphite have been measured by means of high-resolution ellipsometry within the liquid regime of the adsorbed film for temperatures ranging from 180 to 260 K. In the first three monolayers the molecules are oriented parallel to the substrate and the growth is roughly consistent with the Frenkel-Halsey-Hill-model (FHH) that is obeyed in van-der-Waals systems on strong substrates. The condensation of the fourth and higher layers is delayed with respect to the FHH-model. The fourth layer is actually a bilayer. Furthermore there is indication of a wetting transition. The results are interpreted in terms of hydrogen-bridge bonding within and between the layers.

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