X-ray photoelectron spectra of C60 films exposed to air of ca. 20% and 60% humidity at 23°C for 1 h are presented. It was found that the O1 s core peak appeared at a binding energy of 533.5 eV for the film exposed to air of ca. 60% humidity, while no peak corresponding to the O1 s photoelectrons was observed for the film exposed to air of ca. 20% humidity. The binding energy of 533.5 eV for the O1 s core peak is close to that of about 533 eV for the O1 s core peak of solid H2O, while it is different from that of 537 eV for the O1 s core peak of solid O2 on C60 film. These facts indicate that the O1 s peak observed for the air-exposed C60 film was due to H2O molecules adsorbed on the film.
|Number of pages||4|
|Journal||Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films|
|Publication status||Published - 1998 Jan 1|
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films