Evidence for the Bulk Nature of Self-Assembled Monolayer Surface of Fluorinated Alkyl Thiol from Hyperthermal Energy Ion-Surface Collisions
Kinetic energy distributions of fragment ions from hyperthermal energy collisions of CF3+ ions with a self-assembled monolayer surface of fluorinated alkyl thiol on gold substrate have been measured as a function of scattering angle and fragment ion mass. These distributions show two energetically and angularly distrinct pathways for the dissociation of the primary ions. A plot of the velocities of the fragment ions as a Newton disagram for these two processes clearly demonstrates that one process is due to the collision of ions with a fraction of the molecular chain of the monolayer surface molecule with scattering over a broader angular range while the other process is due to collision of the projectile ions with the monolayer surface acting as a bulk surface with fragment ions scattering close to the surface parallel.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 924368
- Report Number(s):
- PNNL-SA-40534; 2162
- Journal Information:
- Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms, 264(2):400-403, Journal Name: Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms, 264(2):400-403
- Country of Publication:
- United States
- Language:
- English
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