Photochemistry and photodissociation dynamics of N2O on metal surfaces

Yoshiyasu Matsumoto; K. Sawabe; Jihwa Lee

doi:10.1117/12.143102

22 April 1993 Photochemistry and photodissociation dynamics of N2O on metal surfaces

Yoshiyasu Matsumoto, K. Sawabe, Jihwa Lee

Proceedings Volume 1858, Laser Techniques for State-Selected and State-to-State Chemistry; (1993) https://doi.org/10.1117/12.143102
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

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.

Citation Download Citation

Yoshiyasu Matsumoto, K. Sawabe, and Jihwa Lee "Photochemistry and photodissociation dynamics of N2O on metal surfaces", Proc. SPIE 1858, Laser Techniques for State-Selected and State-to-State Chemistry, (22 April 1993); https://doi.org/10.1117/12.143102

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