Evidence for the Bulk Nature of Self-Assembled Monolayer Surface of Fluorinated Alkyl Thiol from Hyperthermal Energy Ion-Surface Collisions

Journal Article · Thu Nov 01 04:00:00 EDT 2007 · Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms, 264(2):400-403

DOI:https://doi.org/10.1016/j.nimb.2007.08.083· OSTI ID:924368

Rezayat, Talayeh; Shukla, Anil K

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 Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (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

Related Subjects

CF3+
Environmental Molecular Sciences Laboratory
energy transfer
inelastic scattering
self-assembled monolayer surface
surface-induced dissociation