A Deuteron NMR Study on a Benzene Multilayer on Graphite

Abstract

An NMR sample tube was loaded with graphitized carbon black (Graphon) as well as a ten adsorbed layers equivalent of benzene-d6, and subsequently sealed. The 2H NMR spectra obtained at 298, 170 and 90 K yield the following picture: The multilayer phase with liquid like properties established at 298 K is decomposed at the lower temperatures into a bulk (3D) crystalline phase and an adsorbed phase of, probably, monolayer thickness which can be characterized to exist in the two dimensional (2D) fluid and solid states at 170 and 90 K, respectively.