Topics in Catalysis

, Volume 61, Issue 9–11, pp 776–783 | Cite as

Collision Induced Desorption of Large Molecules From Surfaces: Trimethylamine Removal from Ru(0001)

  • Butros Hallac
  • Micha Asscher
Original Paper


The effect of incident kinetic energy of colliding molecules or atoms on the outcome of activated reactions on metallic surfaces is of general interest in model heterogeneous catalysis. Previous studies have focused on small molecules involved in both direct molecule-surface collisions and collision induced processes. This work presents a study of the interaction of incoming energetic colliders, Ar and Kr, with the large molecule trimethylamine (TMA). In these experiments, the TMA is adsorbed on either a clean Ru(0001) surface or an oxygen covered Ru(0001). The results show that at an incident collider energy of 1.0–2.8 eV, collision induced desorption (CIDE) is the dominant reactivity pathway over collision induced dissociation (CIDI). These observations suggest that energy redistribution within the adsorbed molecule following collision is fast and prevents channeling of the collision energy to internal bond scission.


Surface dynamics Collision induced desorption (CIDE) Trimethylamine TPD 



This work was partially supported by the Israel Science Foundation (ISF) and the German Israel Foundation (GIF). The help of Michelle Akerman is greatly appreciated.

Supplementary material

11244_2018_921_MOESM1_ESM.docx (387 kb)
Supplementary material 1 (DOCX 387 KB)


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Chemistry, Edmund J. Safra CampusThe Hebrew University of JerusalemJerusalemIsrael

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