| AVS 65th International Symposium & Exhibition | |
| Surface Science Division | Monday Sessions |
| Session SS+HC+MI-MoM |
| Session: | Dynamical Processes at Surfaces |
| Presenter: | Rebecca Quardokus, University of Connecticut |
| Authors: | C. Gerber, University of Connecticut R. Quardokus, University of Connecticut |
| Correspondent: | Click to Email |
Sequentially adsorbed anthracene dicarboxylic acid and octanethiol on Au(111) form ordered regions of octanethiol, gold vacancy islands, and areas of disorder near domain boundaries and vacancy islands. Vapor deposition of octanethiol after drop-cast deposition of anthracene dicarboxylic acid on Au(111) results in small (√3 x √3)R30° and c(4x2) octanethiol domains. Initial exposure to soft ultraviolet irradiation increases disorder with only a few small close-packed octanethiol domains remaining. Repeated exposure to soft ultraviolet irradiation shows some removal of octanethiol molecules and sequential imaging by scanning tunneling microscopy gives snapshots of the stepwise reordering of the domains that ultimately leads to a structurally reordered monolayer consisting of larger domains of low-coverage octanethiol in a p x √3 structure.