Smectic Liquid Crystal Monolayers on Graphite Observed by Scanning Tunneling Microscopy

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Science  07 Jul 1989:
Vol. 245, Issue 4913, pp. 43-45
DOI: 10.1126/science.245.4913.43


By means of scanning tunneling microscopy, it is observed that molecules of the form n-alkylcyanobiphenyl, where n = 8 to 12, form two-dimensional crystalline domains when adsorbed onto graphite. The layer spacings measured by tunneling microscopy are 20% larger than those measured previously on bulk material by x-ray diffraction. The structure of the adsorbed molecules is quite different from that of the bulk.

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