β Scribed by R. D. Harris; W. S. Baker; M. J. Van Stipdonk; R. M. Crooks; E. A. Schweikert
No coin nor oath required. For personal study only.
A suite of keV polyatomic or 'cluster' projectiles was used to bombard unoxidized and oxidized selfassembled monolayer surfaces. Negative secondary ion yields, collected at the limit of single ion impacts, were measured and compared for both molecular and fragment ions. In contrast to targets that are orders of magnitude thicker than the penetration range of the primary ions, secondary ion yields from polyatomic projectile impacts on self-assembled monolayers show little to no enhancement when compared with monatomic projectiles at the same velocity. This unusual trend is most likely due to the structural arrangement and bonding characteristics of the monolayer molecules with the Au(111).
π SIMILAR VOLUMES
## Abstract Ion/surface reactions of pyrazine and pyrene molecular ions and the HC~2~N^+Β·^ ion were investigated using an alkyl selfβassembled monolayer surface consisting of hydrogenated and perdeuterated chains (CH~3~(CH~2~)~15~SβAu and CD~3~(CD~2~)~15~SβAu) intimately mixed in a 1:1 ratio. Each