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Orientation control of vanadylphthalocyanine (VOPc) thin films deposited with different thicknesses on Pt (111) substrate were investigated by Vis/UV spectra measured by Vis/UV spectroscopy, XRD profiles analyzed by X-ray diffractometry (XRD), XPS spectra analyzed by a X-ray photoelectron spectroscopy (XPS) and AFM images observed using an atomic force microscope. The orientation of VOPc molecules deposited on a Pt (111) single crystal substrate is influenced by the oxidization on the surface of Pt (111) single crystal substrate, and the interaction between VOPc molecules and the surface of substrate is weak. Therefore, the interaction between VOPc molecules and the surface of substrate is only Van der Waals force.

Thickness Dependence of Orientation of Vanadyl-Phthalocyanine Thin Films Deposited on Pt(111) Single Crystal Substrate