Thumbnail
Access Restriction
Open

Author Piantanida, G. ♦ Breskin, A. ♦ Chechik, R. ♦ Katz, O. ♦ Laikhtman, A. ♦ Hoffman, A. ♦ Coluzza, C.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ♦ AFFINITY ♦ AIR ♦ DIAMONDS ♦ DIPOLES ♦ GASES ♦ HEATING ♦ OXYGEN ♦ PHOTOELECTRON SPECTROSCOPY ♦ PHOTOEMISSION ♦ PHOTONS ♦ PHYSICS
Abstract The effect of moderate heating (200{endash}300{degree}C) in vacuum on the photoemission from air-exposed hydrogen-terminated chemical vapor deposited diamond films was studied in the photon spectral range of 140{endash}210 nm (8.9{endash}5.9 eV). A three- to fivefold enhancement was observed, stable in high vacuum and in some high purity gases, but unstable in air. The surfaces were also examined by x-ray induced photoelectron spectroscopy and ultraviolet induced photoelectron spectroscopy before and after the heating process and upon exposure to air and to oxygen. The results provide good evidence that the strong dipole originating from H{sub 2}O molecules absorbed on the diamond surface is responsible for the observed effect. A simple model is presented for quantitative estimation of the effect. {copyright} 2001 American Institute of Physics.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-06-15
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 89
Issue Number 12


Open content in new tab

   Open content in new tab