Electronic states of 3D aromatic molecules on Au(111) surfaces: adsorption of carboranethiol

To clarify the effect of covalent surface adsorption on the geometric and electronic structure of carboranes, p -carboranethiol ( p CT) was deposited on clean Au(111) surfaces under vacuum and the resulting systems were probed by scanning tunneling microscopy, scanning tunneling spectroscopy and ult...

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Bibliographic Details
Published in:Journal of materials science 2019-07, Vol.54 (14), p.10249-10260
Main Authors: Aoki, Takuto, Nakahama, Yuta, Ikeda, Tadao, Shindo, Masako, Uchiyama, Masanobu, Shudo, Ken-ichi
Format: Article
Language:English
Subjects:
Adsorbates
Adsorption
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Computation and Theory
Crystallography and Scattering Methods
Electron states
Electronic structure
Materials Science
Photoelectrons
Polymer Sciences
Scanning tunneling microscopy
Solid Mechanics
Spectrum analysis
Substrates
Surface chemistry
Ultraviolet spectra
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Summary:To clarify the effect of covalent surface adsorption on the geometric and electronic structure of carboranes, p -carboranethiol ( p CT) was deposited on clean Au(111) surfaces under vacuum and the resulting systems were probed by scanning tunneling microscopy, scanning tunneling spectroscopy and ultraviolet photoelectron spectroscopy. The spectral features observed at different p CT coverage levels revealed the emergence of new electronic states near the surface, which were analyzed using ab initio calculations. The resulting computational and experimental data are used to explain the contributions of these states to bonding between the substrate and adsorbate, resonance with metallic substrate states and substrate-mediated intermolecular interactions.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-019-03598-2