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Citation: WANG Yong-Feng, ZHANG Xin-Ran, YE Ying-Chun, LIANG De-Jian, WANG Yuan, WU Kai. Self-Assemblies of Oxovanadium Phthalocyanine Molecules and Nanoclusters on Highly Oriented Pyrolytic Graphite[J]. Acta Physico-Chimica Sinica, ;2010, 26(04): 933-938. doi: 10.3866/PKU.WHXB20100419 shu

Self-Assemblies of Oxovanadium Phthalocyanine Molecules and Nanoclusters on Highly Oriented Pyrolytic Graphite

1.
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry &Molecular Engineering, Peking University, Beijing 100871, P. R. China

Received Date: 4 December 2009
Available Online: 25 February 2010

Self-assembled monolayer (SAM) of oxovanadium phthalocyanine (VOPc), an organic semiconductor compound, was prepared at room temperature on a highly oriented pyrolytic graphite (HOPG) substrate by immersing the substrate in a 1,2-dichloroethane (C2H4Cl2) colloidal solution containing both VOPc nanoparticles (2-20 nm) and dissolved VOPc molecules (ca 10-3 g·L^-1). The VOPc nanoparticles further assembled on the VOPc SAM. The nanoparticle-assembling in the experimental conditions exhibited a high size-selectivity to VOPc nanoparticles of (4.60±0.47) nm with a standard deviation of 10%. As revealed by scanning tunneling microscopy (STM) measurements, with increasing VOPc concentration of the colloidal solution from 2.5 ×10^-2 to 2.5 ×10 ^-1 g·L^-1, the amount of VOPc nanoparticles assembled on the molecular layer increased gradually, and a dense VOPc nanoparticle monolayer formed in the end. The found assembly structures and method are promising for the development of photoelectric or electric functional systems.
- Self-assembly,
- Oxovanadiumphthalocyanine,
- Nanoparticles,
- HOPG,
- Scanning tunneling microscopy,
- VOPc
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