The self-assembling of
3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) molecules deposited on an
InSb(001) c(8 × 2) surface at sub-monolayer quantities has been investigated at
low temperature (77 K) using scanning tunnelling microscopy. Sub-molecular
resolution was obtained on PTCDA molecules. The results reveal that individual
PTCDA molecules are arranged on the substrate in chains parallel to the [110]
crystallographic direction, correlated with characteristic features of the low
temperature InSb(001) c(8 × 2) surface electronic structure. A structural model
for PTCDA molecules adsorbed on InSb is proposed.
Source:IOPscience
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