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Bajales, Noelia ; Schmaus, Stefan ; Miyamashi, Toshio ; Wulfhekel, Wulf ; Wilhelm, Jan ; Walz, Michael ; Stendel, Melanie ; Bagrets, Alexei ; Evers, Ferdinand ; Ulas, Seyithan ; Kern, Bastian ; Böttcher, Artur ; Kappes, Manfred M.

C58 on Au(111): A scanning tunneling microscopy study

Article

Bajales, Noelia, Schmaus, Stefan, Miyamashi, Toshio, Wulfhekel, Wulf, Wilhelm, Jan, Walz, Michael, Stendel, Melanie, Bagrets, Alexei, Evers, Ferdinand , Ulas, Seyithan, Kern, Bastian, Böttcher, Artur and Kappes, Manfred M. (2013) C58 on Au(111): A scanning tunneling microscopy study. The Journal of Chemical Physics 138 (10), p. 104703.

DOI to cite this document: 10.5283/epub.46013


Abstract

C58 fullerenes were adsorbed onto room temperature Au(111) surface by low-energy (∼6 eV) cluster ion beam deposition under ultrahigh vacuum conditions. The topographic and electronic properties of the deposits were monitored by means of scanning tunnelling microscopy (STM at 4.2 K). Topographic images reveal that at low coverages fullerene cages are pinned by point dislocation defects on the ...

C58 fullerenes were adsorbed onto room temperature Au(111) surface by low-energy (∼6 eV) cluster ion beam deposition under ultrahigh vacuum conditions. The topographic and electronic properties of the deposits were monitored by means of scanning tunnelling microscopy (STM at 4.2 K). Topographic images reveal that at low coverages fullerene cages are pinned by point dislocation defects on the herringbone reconstructed gold terraces (as well as by step edges). At intermediate coverages, pinned monomers act as nucleation centres for the formation of oligomeric C58 chains and 2D islands. At the largest coverages studied, the surface becomes covered by 3D interlinked C58 cages. STM topographic images of pinned single adsorbates are essentially featureless. The corresponding local densities of states are consistent with strong cage-substrate interactions. Topographic images of [C58]n oligomers show a stripe-like intensity pattern oriented perpendicular to the axis connecting the cage centers. This striped pattern becomes even more pronounced in maps of the local density of states. As supported by density functional theory, DFT calculations, and also by analogous STM images previously obtained for C60 polymers [M. Nakaya, Y. Kuwahara, M. Aono, and T. Nakayama, J. Nanosci. Nanotechnol. 11, 2829 (2011)] https://doi.org/10.1166/jnn.2011.3898., we conclude that these striped orbital patterns are a fingerprint of covalent intercage bonds. For thick C58 films we have derived a bandgap of 1.2 eV from scanning tunnelling spectroscopy data confirming that the outermost C58 layer behaves as a wide band semiconductor.



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Details

Item typeArticle
Journal or Publication TitleThe Journal of Chemical Physics
PublisherAmerican Institute of Physics (AIP)
Open Access TypeDue to SHERPA/RoMEO
Volume138
Number of Issue or Book Chapter10
Page Rangep. 104703
Date11 March 2013
Date of publication18 Jun 2021 06:59
InstitutionsPhysics > Institute of Theroretical Physics > Chair Ferdinand Evers
Identification Number
ValueType
10.1063/1.4793761DOI
Dewey Decimal Classification500 Science > 530 Physics
StatusPublished
RefereedYes, this version has been refereed
Created at the University of RegensburgNo
URN of the UB Regensburgurn:nbn:de:bvb:355-epub-460137
Item ID46013

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