Weymouth, Alfred J. and Roche, Emily and Giessibl, Franz J. (2022) From a free electron gas to confined states: A mixed island of PTCDA and copper phthalocyanine on Ag(111). BEILSTEIN JOURNAL OF NANOTECHNOLOGY, 13. pp. 1572-1577. ISSN 2190-4286,
Full text not available from this repository. (Request a copy)Abstract
When perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) is deposited on the Ag(111) surface at submonolayer coverage, it forms islands under which the native Shockley state of the Ag(111) surface can no longer be found. Previous work has shown that this state shifts upwards to form a new interface state starting at 0.6 V above the Fermi level, having properties of a two-dimen-sional electron gas (2DEG). We investigated mixed islands of PTCDA and copper phthalocyanine (CuPc) to study the change in the electronic state with the addition of an electron donor. We no longer observe a 2DEG state and instead identify states at 0.46 and 0.79 V. While one state appears in dI/dV images as an array of one-dimensional quantum wells, our analysis shows that this state does not act as a free electron gas and that the features are instead localized above individual PTCDA molecules.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FORCE MICROSCOPY; GROWTH; AFM; copper phthalocyanine; dI; dV; PTCDA; STM |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Franz J. Giessibl |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Dec 2023 10:00 |
| Last Modified: | 05 Dec 2023 10:00 |
| URI: | https://pred.uni-regensburg.de/id/eprint/56909 |
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