Dynamic scanning probe microscopy of adsorbed molecules on graphite

Details Dynamic scanning probe microscopy of adsorbed molecules on graphite Dynamic scanning probe microscopy of adsorbed molecules on graphite

2008-07-25

arxiv.org/abs/0807.4183v2

Applied Physics Letters 94 (2009)

Physics

Condensed Matter

Materials Science

11 pages, 2 figures

Scientific paper

10.1063/1.3075054

We have used a combined dynamic scanning tunneling and atomic force microscope to study the organisation of weakly bound adsorbed molecules on a graphite substrate. Specifically we have acquired images of islands of the perylene derivative molecules. These weakly bound molecules may be imaged in dynamic STM, in which the probe is oscillated above the surface. We show that molecular resolution may be readily attained and that a similar mode of imaging may be realised using conventional STM arrangement. We also show, using tunnelling spectroscopy, the presence of an energy gap for the adsorbed molecules confirming a weak molecule-substrate interaction.

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