Ion-surface Collisions on Cl, Br, and F Terminated Self-Assembled Monolayers (SAMs)

摘要

Ion activation by reactive ion scattering spectrometry (RISS) can be manipulated by altering the surface composition thereby creating differences in fragmentation and neutralization of impinging ions. To facilitate the selective choice of surfaces to match specific applications, fundamental knowledge about important surface parameters in RISS must be investigated. This has practical implications for the fragmentation of large biomolecules as well as for small compounds that necessitate more gentle conditions in order to retain structural information. In this study we use a series of self-assembled monolayers (SAMs) with terminal halogen substituents to systematically explore the affects of interfacial dipole moments as well as the terminal mass dependence on ion fragmentation and neutralization.