Photodesorption of NO from Au(100) using 3D surface-velocity map imaging

Research output: Contribution to journalArticle

  • Authors:
  • Saada Abujarada
  • Huda Alsalem
  • Urslaan Chohan
  • Gemma Draper
  • Sven Koehler (Corresponding)


We measured the fully resolved 3-dimensional velocity distributions of nitric oxide photodesorbed from a gold single crystal. These experiments combine time-of-flight measurements and the velocity map imaging technique to yield velocity distributions resolved in three dimensions for a prototypical surface-adsorbate system. Nitric oxide adsorbed on Au(100) was photodesorbed using a 355 nm laser beam. The desorbed NO molecules were ionised in the gas-phase by resonance-enhanced multi-photon ionisation within a set of velocity map imaging optics. The NO molecules preferentially leave the surface along the surface normal with a very narrow angular distribution, indicating a non-thermal desorption process.

Bibliographical metadata

Original languageEnglish
Pages (from-to)184201-1
Number of pages184201
JournalThe Journal of chemical physics
Issue number18
StatePublished - 11 Nov 2016