Observation of coexistence of 1D and 2D nanostructures in cobalt dipyrromethene trimer complexes adsorbed on a graphite surface
Son, S. B.; Lee, S. J.; Hahn, J. R.; Ma, L.; Shin, J.-Y.; Dolphin. D.
Applied Surface Science
The direct observation of 1D and 2D nanostructures of Co dipyrromethene trimer complexes adsorbed on a highly oriented pyrolytic graphite surface were reported using scanning tunneling microscopy (STM). STM images showed 2 types of ordered structures coexisting on the surface: long 1D mol. chains isolated on the terraces, and 2D hexagonal patterns confined by a 1D chain and/or a graphite step edge. These 1D and 2D structures are attributed to edge-on' and face-on' complex alignments on the surface. In both configurations, substrate-mediated mol.-mol. interactions may play a significant role in stabilizing the nanostructures.