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Dell'Angela M, Kladnik G, Cossaro A, Verdini A, Kamenetska M, Tamblyn I, Quek SY, Neaton JB, Cvetko D, Morgante A, Venkataraman L. Relating energy level alignment and amine-linked single molecule junction conductance. Nano Lett 2010; 10:2470-2474. [PMID: 20578690 DOI: 10.1021/nl100817h] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Using photoemission spectroscopy, we determine the relationship between electronic energy level alignment at a metal-molecule interface and single-molecule junction transport data. We measure the position of the highest occupied molecular orbital (HOMO) relative to the Au metal Fermi level for three 1,4-benzenediamine derivatives on Au(111) and Au(110) with ultraviolet and resonant X-ray photoemission spectroscopy. We compare these results to scanning tunnelling microscope-based break-junction measurements of single molecule conductance and to first-principles calculations. We find that the energy difference between the HOMO and Fermi level for the three molecules adsorbed on Au(111) correlate well with changes in conductance and agree well with quasiparticle energies computed from first-principles calculations incorporating self-energy corrections. On the Au(110) that presents Au atoms with lower-coordination, critical in break-junction conductance measurements, we see that the HOMO level shifts further from the Fermi level. These results provide the first direct comparison of spectroscopic energy level alignment measurements with single molecule junction transport data.
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Cossaro A, Cvetko D, Bavdek G, Floreano L, Gotter R, Morgante A, Evangelista F, Ruocco A. Copper−Phthalocyanine Induced Reconstruction of Au(110). J Phys Chem B 2004. [DOI: 10.1021/jp049108h] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Cossaro
- Laboratorio TASC dell'Istituto Nazionale per la Fisica della Materia, Basovizza SS-14, Km 163.5, I-34012 Trieste, Italy, Department of Physics, University of Ljubljana, Ljubljana, Slovenia, Jožef Stefan Institute, Ljubljana, Slovenia, Department of Physics, University of Trieste, Trieste, Italy, INFM unit of Roma Tre and Physics Department, University of Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy
| | - D. Cvetko
- Laboratorio TASC dell'Istituto Nazionale per la Fisica della Materia, Basovizza SS-14, Km 163.5, I-34012 Trieste, Italy, Department of Physics, University of Ljubljana, Ljubljana, Slovenia, Jožef Stefan Institute, Ljubljana, Slovenia, Department of Physics, University of Trieste, Trieste, Italy, INFM unit of Roma Tre and Physics Department, University of Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy
| | - G. Bavdek
- Laboratorio TASC dell'Istituto Nazionale per la Fisica della Materia, Basovizza SS-14, Km 163.5, I-34012 Trieste, Italy, Department of Physics, University of Ljubljana, Ljubljana, Slovenia, Jožef Stefan Institute, Ljubljana, Slovenia, Department of Physics, University of Trieste, Trieste, Italy, INFM unit of Roma Tre and Physics Department, University of Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy
| | - L. Floreano
- Laboratorio TASC dell'Istituto Nazionale per la Fisica della Materia, Basovizza SS-14, Km 163.5, I-34012 Trieste, Italy, Department of Physics, University of Ljubljana, Ljubljana, Slovenia, Jožef Stefan Institute, Ljubljana, Slovenia, Department of Physics, University of Trieste, Trieste, Italy, INFM unit of Roma Tre and Physics Department, University of Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy
| | - R. Gotter
- Laboratorio TASC dell'Istituto Nazionale per la Fisica della Materia, Basovizza SS-14, Km 163.5, I-34012 Trieste, Italy, Department of Physics, University of Ljubljana, Ljubljana, Slovenia, Jožef Stefan Institute, Ljubljana, Slovenia, Department of Physics, University of Trieste, Trieste, Italy, INFM unit of Roma Tre and Physics Department, University of Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy
| | - A. Morgante
- Laboratorio TASC dell'Istituto Nazionale per la Fisica della Materia, Basovizza SS-14, Km 163.5, I-34012 Trieste, Italy, Department of Physics, University of Ljubljana, Ljubljana, Slovenia, Jožef Stefan Institute, Ljubljana, Slovenia, Department of Physics, University of Trieste, Trieste, Italy, INFM unit of Roma Tre and Physics Department, University of Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy
| | - F. Evangelista
- Laboratorio TASC dell'Istituto Nazionale per la Fisica della Materia, Basovizza SS-14, Km 163.5, I-34012 Trieste, Italy, Department of Physics, University of Ljubljana, Ljubljana, Slovenia, Jožef Stefan Institute, Ljubljana, Slovenia, Department of Physics, University of Trieste, Trieste, Italy, INFM unit of Roma Tre and Physics Department, University of Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy
| | - A. Ruocco
- Laboratorio TASC dell'Istituto Nazionale per la Fisica della Materia, Basovizza SS-14, Km 163.5, I-34012 Trieste, Italy, Department of Physics, University of Ljubljana, Ljubljana, Slovenia, Jožef Stefan Institute, Ljubljana, Slovenia, Department of Physics, University of Trieste, Trieste, Italy, INFM unit of Roma Tre and Physics Department, University of Roma Tre, Via della Vasca Navale 84, 00146 Roma, Italy
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