Pinardi, A.L.; Biddau, G.; van de Ruit, K.; Otero-Irurueta, G.; Gardonio, S.; Lizzit, S.; Schennach, R.; Flipse, C.F.J.; Lopez, M.F.; Méndez, J.; Perez, R.; Martin-Gago, J.A.
Published in: Nanotechnology
DOI:10.1088/0957-4484/25/38/385602Published: 01/01/2014
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Citation for published version (APA):Pinardi, A. L., Biddau, G., Ruit, van de, K., Otero-Irurueta, G., Gardonio, S., Lizzit, S., ... Martin-Gago, J. A. (2014). Vacancy formation on C60/Pt (111): unraveling the complex atomistic mechanism. Nanotechnology, 25, 385602-1/13. DOI: 10.1088/0957-4484/25/38/385602
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AbstractThe interaction of fullerenes with transition metal surfaces leads to the development of an atomic network of ordered vacancies on the metal. However, the structure and formation mechanism of this intricate surface reconstruction is not yet understood at an atomic level. We combine scanning tunneling microscopy, high resolution and temperature programmed-x-ray photoelectrons spectroscopy, and density functional theory calculations to show that the vacancy formation in C60/Pt(111) is a complex process in which fullerenes undergo two significant structural rearrangements upon thermal annealing. At first, the molecules are physisorbed on the surface; next, they chemisorb inducing the formation of an adatom-vacancy pair on the side of the fullerene. Finally, this metastable state relaxes when the adatom migrates away and the vacancy moves under the molecule. The evolution from a weakly-bound fullerene to a chemisorb...