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| - Electron Transport Across the Alkanethiol Self-assembled Monolayer/Au(111) Interface: Role of the Chemical Anchor
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| - Alkanethiol self-assembled monolayers (SAMs) on Au(111) are model systems for molecular electronics.We probe the role of the chemisorption bond on electron dynamics at the SAM/Au interface using time-resolved two-photon photoemission. Formation of the Au−S bond is evidenced by a localized σ* resonance,which broadens and shifts upward in energy when the lying-down chemisorbed molecules stand up. Thelocalized chemisorption bond does not affect the electronic coupling between delocalized image resonancesand the metal substrate. Instead, lifetimes of image resonances are decreased due to scattering with S atomswithin the thiol or thiolate monolayer.
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