Adsorption-Induced Conformational Isomerization of Alkyl-Substituted Thiophene Oligomers on Au(111): Impact on the Interfacial Electronic Structure
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
Alkyl-substituted quaterthiophenes on Au(111) form dimers linked by their alkyl substituents and, instead of adopting the trans conformation found in bulk oligothiophene crystals, assume cis conformations. Surprisingly, the impact of the conformation is not decisive in determining the lowest unoccupied molecular orbital energy. Scanning tunneling microscopy and spectroscopy of the adsorption geometries and electronic structures of alkyl-substituted quaterthiophenes show that the orbital energies vary substantially because of local variations in the Au(111) surface reactivity. These results demonstrate that interfacial oligothiophene conformations and electronic structures may differ substantially from those expected based on the band structures of bulk oligothiophene crystals.
Details
Originalsprache | Englisch |
---|---|
Seiten (von - bis) | 15138-15142 |
Seitenumfang | 5 |
Fachzeitschrift | ACS Applied Materials and Interfaces |
Jahrgang | 7 |
Ausgabenummer | 28 |
Publikationsstatus | Veröffentlicht - 8 Juli 2015 |
Peer-Review-Status | Ja |
Schlagworte
Forschungsprofillinien der TU Dresden
ASJC Scopus Sachgebiete
Schlagwörter
- adsorption configuration, oligothiophene, organic electronics, quaterthiophene, scanning tunneling spectroscopy, surface reconstruction