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Proceedings Paper

Photochemistry and photodissociation dynamics of N2O on metal surfaces
Author(s): Yoshiyasu Matsumoto; K. Sawabe; Jihwa Lee
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Paper Abstract

Photochemistry of N2O adsorbed on a Pt(111) surface at 193 nm has been studied by temperature-programmed desorption (TPD) and time-of-flight (TOF) distribution analysis. Upon the irradiation of excimer laser pulses at 193 nm, adsorbed N2O molecules are either desorbed or dissociated to produce oxygen adatoms and nitrogen molecules in the gas phase. In addition, a small amount of adsorbed NO is found by TPD after the irradiation. The production yields of oxygen adatoms depend on the polarization and angle-of-incidence of laser light. This suggests that electron transfer to adsorbed N2O initiated by the surface excitation is a predominant primary step for the production of oxygen adatoms. Both TOF distributions of N2O and N2 reveal nonthermal multiple velocity components. The mechanisms of the photochemical processes and the origins of the multiple velocity components are discussed.

Paper Details

Date Published: 22 April 1993
PDF: 12 pages
Proc. SPIE 1858, Laser Techniques for State-Selected and State-to-State Chemistry, (22 April 1993); doi: 10.1117/12.143102
Show Author Affiliations
Yoshiyasu Matsumoto, Institute for Molecular Science (Japan)
K. Sawabe, Institute for Molecular Science (Japan)
Jihwa Lee, Institute for Molecular Science (Japan)

Published in SPIE Proceedings Vol. 1858:
Laser Techniques for State-Selected and State-to-State Chemistry
Cheuk Yiu Ng, Editor(s)

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