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Drastic Au(111) Surface Reconstruction upon Insulin Growth Factor Tripeptide Adsorption

Abstract : Adsorption of biomolecules at metal surfaces often creates two-dimensional ordering of the adlayers. However, metal substrate reconstruction is less commonly observed, unless upon annealing of the molecule−surface system. Here, we report on the drastic room-temperature reconstruction of the Au(111) surface, driven by the adsorption of insulin growth factor tripeptide molecules. Scanning tunneling microscopy images show that the surface reconstruction, which takes place without annealing the system, is dynamic and evolves over time. It is initiated at kinks and steps edges, but the reconstruction also takes place within defect-free terraces. Theoretical calculations are performed to explain the reconstruction at the molecular level.
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https://hal.sorbonne-universite.fr/hal-00748253
Contributor : Sabine Mendes <>
Submitted on : Monday, November 5, 2012 - 11:23:23 AM
Last modification on : Tuesday, November 17, 2020 - 2:04:02 PM

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Vincent Humblot, Anne Vallee, Ahmed Naitabdi, Frederik Tielens, Claire-Marie Pradier. Drastic Au(111) Surface Reconstruction upon Insulin Growth Factor Tripeptide Adsorption. Journal of the American Chemical Society, American Chemical Society, 2012, 134, pp.6579−6583. ⟨10.1021/ja302530q⟩. ⟨hal-00748253⟩

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