title: Self-assembled monolayers of 2-Adamantanethiol on Au{111}: control of structure and displacement.
abstract: We have investigated the formation of 2-adamantanethiolate self-assembled monolayers on Au{111} and their displacement by n-dodecanethiol, using scanning tunneling microscopy, X-ray photoelectron spectroscopy, and infrared reflection absorption spectroscopy. Well-ordered 2-adamantanethiolate monolayers undergo rapid and significant molecular exchange upon exposure to n-dodecanethiol solutions, but their structures and intermolecular interactions template the growth of n-dodecanethiolate domains. Annealing 2-adamantanethiolate monolayers at 78 degrees C decreases the density of vacancy islands, while increasing the overall order and the average domain sizes in the films. This results in slower displacement by n-dodecanethiol molecules, as compared to unannealed monolayers. The secondary sulfur position on the adamantyl cage influences the lattice structure and exchange of 2-adamantanethiolate monolayers by alkanethiols.
authors.affiliation: Department of Chemistry and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors.forename: Moonhee
authors.initials: M
authors.lastname: Kim
authors.forename: J Nathan
authors.initials: JN
authors.lastname: Hohman
authors.forename: Elizabeth I
authors.initials: EI
authors.lastname: Morin
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Daniel
authors.forename: Paul S
authors.initials: PS
authors.lastname: Weiss