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  • ResolvingC60Vacancy_preprint

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Origin of C60 surface reconstruction resolved by atomic force microscopy

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Article number205428
<mark>Journal publication date</mark>22/11/2021
<mark>Journal</mark>Physical Review B: Condensed Matter and Materials Physics
Issue number20
Volume104
Number of pages5
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Surface adsorption of
C
60
affects its chemical and electronic properties. Numerous studies have reported observation of bright and dark fullerenes on metal surfaces that suggest extensive surface reconstruction; however, the underpinning mechanism of the reconstruction remains under debate. Here we report tip-functionalized noncontact atomic force microscope measurements which unambiguously reveal that
C
60
fullerenes adsorb with three well-defined adsorption heights on the Cu(111) surface, consistent with theoretical reports of top-layer hollow sites, single-atom vacancies, and surface nanopits. Using single-molecule resolution
Δ
f
(
z
)
measurements we identify well-defined adsorption heights specific to each site, confirming the presence of a complex vacancy model for
C
60
monolayers on metal surfaces.

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© 2021 American Physical Society