Krasnikov, SA, Sergeeva, NN, Sergeeva, YN, Senge, MO, Cafolla, AA, Self-assembled rows of Ni porphyrin dimers on the Ag(111) surface, Physical Chemistry Chemical Physics, 12, 25, 2010, 6666-6671
Physical Chemistry Chemical Physics 12 25
The growth and ordering of 5-(10,15,20-triphenylporphyrinatonickel(II))dimer (NiTPP-dimer) molecules on the Ag(111) surface have been investigated using scanning tunnelling microscopy/spectroscopy (STM/STS) and low-energy electron diffraction (LEED). At one monolayer (ML) coverage the NiTPP-dimer forms a well-ordered close-packed molecular layer in which the porphyrin molecules have a flat orientation with the molecular plane lying parallel to the substrate. STM and LEED data obtained from one monolayer of the NiTPP-dimer on the Ag(111) surface show the formation of three domains which grow along the main crystallographic directions of the substrate. Scanning tunnelling spectroscopy data obtained from the NiTPP-dimer on the Ag(111) surface show good agreement with optical band gap measurements and density functional theory calculations.
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