H. Fang, L. Giancarlo, G. Flynn
Aug 26, 1998
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0
Influential Citations
17
Citations
Journal
Journal of Physical Chemistry B
Abstract
Scanning tunneling microscopy (STM) has been used to study 11-bromoundecanoic acid, Br(CH2)10COOH, and 12-bromododecanoic acid, Br(CH2)11COOH, adsorbed on the basal plane of highly oriented pyrolytic graphite (HOPG) from phenyloctane solution. The STM tip is immersed in a drop of solution and images molecules at the liquid−solid interface. Atomically resolved images provide a clear picture of the conformation of these two molecules on the graphite surface. Although differing in structure by only a single methylene group, the 11-bromo and 12-bromo species exhibit very different packing structures at the liquid (phenyloctane solution)−solid (graphite) interface. A simple geometric effect is believed to be responsible for the observed packing differences.