Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 113, Issue 16, Pages 3895-3903Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp810048n
Keywords
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Funding
- Center for Nanoscale Science
- National Science Foundation Materials Research and Science Engineering Center
- Semiconductor Research Corporation
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1041943] Funding Source: National Science Foundation
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We have investigated the formation of 2-adamantanethiolate self-assembled monolayers on Au{III} 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.
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