Shinku

Vanadyl phthalocyanine (VOPc) thin films were produced on glass substrates by the molecular beam epitaxy and vacuum deposition techniques. The orientation and alignment of VOPc thin films have been investigated with the thermal stimulated current (TSC) method. The TSC of VOPc thin film deposited on micro-cover-glass (Glass) show P₁ (-60°C), P₂ (-30°C) and P₃ (-5°C) peaks. The TSC of glass alone has P₁ and P₃ peaks so that the origins of P₁ and P₃ peaks may be due to the transition of ions in glass. The P₂ peak does not exist in the TSC of glass alone. Therefore, the origin of P₂ peak seems to be due to the depolarization of VOPc molecules under a structural change of phase I of a VOPc thin film. The depolarization energy is estimated from the relaxation temperature of P₂ peak. It agrees well with the binding energy of Van der Waals crystal.

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A technique of chemical polishing and subsequent cleaning was developed as the final surface treatment of most of aluminum alloys those are used as component materials in ultrahigh and extremely high vacuum equipments. This paper focuses to most recurrently used alloys, A5052 and A6061. Surfaces treated by the new technique are smooth enough to give a clear reflection. The outgassing properties by thermal desorption spectroscopy, pump-down characteristics, and surface analyses by Auger electron spectroscopy, atomic force microscopy, Brunauer-Emmett-Teller method, and humidity cabinet test were examined on the chemically polished samples. The outgassing rate of the chemically polished samples is in the lowest range of value to those reported for mechanically machined aluminum alloys. The atmospheric corrosion resistance of chemically polished samples is better than that of any mechanically machined samples, and the specially treated chemically polished samples has higher corrosion resistance than the electrolytically polished samples.

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