m-MTDATA on Au(111): Spectroscopic Evidence of Molecule–Substrate InteractionsClick to copy article linkArticle link copied!
- Teng Zhang*Teng Zhang*[email protected]School of Integrated Circuits and Electronics, MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, Beijing Institute of Technology, 100081 Beijing, ChinaMore by Teng Zhang
- Cesare GrazioliCesare GrazioliIOM-CNR, Laboratorio TASC, Sincrotrone Trieste, 34149 Trieste, ItalyMore by Cesare Grazioli
- Ambra GuarnaccioAmbra GuarnaccioISM-CNR, Istituto di Struttura della Materia, 85050 Tito Scalo, Pz, ItalyMore by Ambra Guarnaccio
- Iulia Emilia BrumboiuIulia Emilia BrumboiuDepartment of Chemistry, Pohang University of Science and Technology (POSTECH), 37673 Pohang, Republic of KoreaMore by Iulia Emilia Brumboiu
- Valeria LanzilottoValeria LanzilottoDepartment of Chemistry, Sapienza Università di Roma, P.le A. Moro 5, 00185 Roma, ItalyMore by Valeria Lanzilotto
- Fredrik O. L. JohanssonFredrik O. L. JohanssonDepartment of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, SwedenDivision of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology, 10044 Stockholm, SwedenInstitut des Nanosciences de Paris, UMR CNRS 7588, Sorbonne Université, F-75005 Paris, FranceMore by Fredrik O. L. Johansson
- Klára BeranováKlára BeranováElettra-Sincrotrone Trieste S. C. p. A., Strada Statale 14, km 163.5, Basovizza, 34149 Trieste, ItalyFZU − Institute of Physics of the Czech Academy of Sciences, 18221 Prague, Czech RepublicMore by Klára Beranová
- Marcello CorenoMarcello CorenoISM-CNR, Istituto di Struttura della Materia, 85050 Tito Scalo, Pz, ItalyMore by Marcello Coreno
- Monica de SimoneMonica de SimoneIOM-CNR, Laboratorio TASC, Sincrotrone Trieste, 34149 Trieste, ItalyMore by Monica de Simone
- Barbara BrenaBarbara BrenaDepartment of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, SwedenMore by Barbara Brena
- Carla Puglia*Carla Puglia*[email protected]Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, SwedenMore by Carla Puglia
Abstract
The starburst π-conjugated molecule based on triphenylamine (TPA) building blocks, 4,4′,4″-tris(N-3-ethylphenyl-N-phenylamino)triphenylamine (C57H48N4, m-MTDATA), is widely used in optoelectronic devices due to its electron-donating properties. The electronic structure of m-MTDATA adsorbed on an Au(111) surface was investigated by means of photoelectron spectroscopy (PES) and near edge X-ray absorption fine structure (NEXAFS) spectroscopy. The results were further compared to gas-phase measurements and DFT calculations. Our results clearly indicate a significant molecule–substrate interaction that induces considerable modifications on the electronic structure of the adsorbate compared to the isolated molecule. The energy level alignment analysis shows that the HOMO–LUMO gap is filled by new interface states.
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