This work examines the properties of excited molecules emitted from gas‐dosed alkali‐metal and alkali‐halide surfaces due to electron‐ and photon‐stimulated desorption (ESD and PSD) to elucidate molecular surface dynamical processes. Our measurements indicate that (1) CN adsorbates are generated when alkali‐rich surfaces are exposed to gaseous CO2 and N2 molecules, (2) OH adsorbates are generated from exposure of the surfaces to gaseous H2 and CO2, (3) cross sections for CN* ESD and excitation functions for CN* PSD depend on alkali‐CN parent bonds on the surface, and (4) rotational distributions of the electronically desorbing excited CN exhibit temperature‐independent non‐Boltzmann features which systematically depend on substrates. This research demonstrates that desorbing molecules, arising from ESD and PSD, constitute an internal‐state‐resolved and surface‐bond‐sensitive probe which gives information on the static and dynamic properties of surface molecular systems.
Skip Nav Destination
Research Article| July 01 1992
Electron‐ and photon‐stimulated desorption as a probe of the dynamics of molecules on surfaces
Jun Xu, Alan Barnes, Norman Tolk; Electron‐ and photon‐stimulated desorption as a probe of the dynamics of molecules on surfaces. J. Vac. Sci. Technol. A 1 July 1992; 10 (4): 2216–2221. https://doi.org/10.1116/1.578007
Download citation file: