On many substrates, single layers of Phthalocyanine shows the formation of well-ordered surface over-structures, with the possibility of molecule polymerization. The morphology of the final overlayers depends on many factors, including the particular interaction between the molecules and the used substrate and the presence of thermal treatments. [J. Chem. Phys. 134, 094705 (2011)]
In this work we studied the case of metal-free hydrogen phthalocyanine (H2-Pc) and iron phthalocyanine (Fe-Pc) deposited on Ni(111). It is found that the molecules start breaking/polymerize at around 210C in the case of H2-Pc and at around 240C in the case of Fe-Pc. Under proper conditions, the molecules can form graphene-like overlayers. and we observed that the processes needs several hours to get equilibrium. The molecular break/polymerization and all steps of the graphene-like superstructures formation were monitored using in-situ X-ray and ultra-violet photoemission spectroscopies.
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Негізгі бет Formation of graphene-like nanostructure on Ni(111) using Phthalocyanine as precursor
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