Quantum-resolved stimulated desorption and dissociation processes of adsorbed molecules

A. R. Burns, Ellen Stechel, D. R. Jennison

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The electronic excitations and subsequent dynamics responsible for the stimulated desorption and dissociation of adsorbed molecules on metal surfaces can be characterized in detail by examining the neutral gas-phase products in a quantum specific fashion. Specifically, we have studied the electron-stimulated desorption (ESD) of NO from clean and O-covered Pt(111), and the electron-stimulated dissociation of NO2 on clean Pt(111) through state-selective, time-of-flight laser resonance-ionization of the NO product. In these experiments, we can determine the nature of a given electronic excitation by determining the threshold for the stimulated process and correlating it with photoelectron spectra and calculated excitation lifetimes. By determining the translational, vibrational, and rotational energy distributions of the ESD or stimulated dissociation products, a dynamical picture emerges which can be directly correlated with the electronic excitation and the extent of charge-transfer screening from the substrate. The presence of co-adsorbates such as atomic O modify screening charge and thus directly affect both the lifetimes of excitations and the dynamics of the stimulated event.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsS.Nicolas Nogar
PublisherPubl by Int Soc for Optical Engineering
Pages30-40
Number of pages11
Volume1208
ISBN (Print)0819402494
Publication statusPublished - 1990
EventLaser Photoionization and Desorption Surface Analysis Techniques - Los Angeles, CA, USA
Duration: Jan 18 1990Jan 19 1990

Other

OtherLaser Photoionization and Desorption Surface Analysis Techniques
CityLos Angeles, CA, USA
Period1/18/901/19/90

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Burns, A. R., Stechel, E., & Jennison, D. R. (1990). Quantum-resolved stimulated desorption and dissociation processes of adsorbed molecules. In S. N. Nogar (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 1208, pp. 30-40). Publ by Int Soc for Optical Engineering.