1
|
Otero R, Miranda R, Gallego JM. A Comparative Computational Study of the Adsorption
of TCNQ and F4-TCNQ on the Coinage Metal Surfaces. ACS OMEGA 2019; 4:16906-16915. [PMID: 31646237 PMCID: PMC6796988 DOI: 10.1021/acsomega.9b02154] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 09/11/2019] [Indexed: 05/22/2023]
Abstract
![]()
The
adsorption of tetracyanoquinodimethane and of the closely related
derivative tetrafluorotetracyanoquinodimethane on the (111) surfaces
of the coinage metals, namely, copper, silver, and (unreconstructed)
gold, has been studied by dispersion-corrected ab initio density functional
theory calculations. In order to separate the molecule–substrate
interaction from the effects of molecule–molecule interaction,
only the isolated molecules are considered. The results show that,
in this case, the strength of the interaction of both molecules with
the surfaces decreases in the expected order Cu > Ag > Au. The
total
amount of charge transfer, however, behaves in a different way, being
larger for Ag and smaller for Cu and Au. This trend can be explained
by a combination of the differences in the work functions of the three
metals and the amount of backdonation between the molecule and the
metal.
Collapse
Affiliation(s)
- Roberto Otero
- Dep.
de Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
- Instituto
Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
| | - Rodolfo Miranda
- Dep.
de Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
- Instituto
Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
| | - José M. Gallego
- Instituto
de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain
- E-mail:
| |
Collapse
|
2
|
Lach S, Altenhof A, Shi S, Fahlman M, Ziegler C. Electronic and magnetic properties of a ferromagnetic cobalt surface by adsorbing ultrathin films of tetracyanoethylene. Phys Chem Chem Phys 2019; 21:15833-15844. [PMID: 31282504 DOI: 10.1039/c9cp02205h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Ultrathin films of tetracyanoethylene (TCNE) on Co(100) were investigated by means of spin-integrated and spin-resolved photoemission spectroscopy ((sp-)UPS), X-ray photoemission spectroscopy (XPS), near edge X-ray absorption fine-structure spectroscopy (NEXAFS), and X-ray magnetic circular dichroism (XMCD). We found a coverage-dependent modulation of the interface dipole and a switching between a metallic and a resistive spin filtering at the interface triggered by two distinct adsorption geometries of TCNE. The strongest hybridization and spin structure modifications are found at low coverage with a face-on adsorption geometry indicating changes in the distance between the surface Co atoms beneath. TCNE has the potential to manipulate the magnetic moments in the Co surface itself, including the possibility of magnetic hardening effects. In summary, the system TCNE/Co offers an experimentally rather easy and controllable way to build up a stable molecular platform stabilizing the reactive ferromagnetic Co surface and customizing the electronic and magnetic properties of the resulting spinterface simultaneously. This makes this system very attractive for spintronic applications as an alternative, less reactive but highly spin polarized foundation beside graphene-based systems.
Collapse
Affiliation(s)
- Stefan Lach
- Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Kaiserslautern, 67663 Kaiserslautern, Germany.
| | - Anna Altenhof
- Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Kaiserslautern, 67663 Kaiserslautern, Germany.
| | - Shengwei Shi
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205 Wuhan, China and Department of Physics, Chemistry and Biology, University of Linköping, Linköping, 58183 Linköping, Sweden
| | - Mats Fahlman
- Department of Physics, Chemistry and Biology, University of Linköping, Linköping, 58183 Linköping, Sweden
| | - Christiane Ziegler
- Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Kaiserslautern, 67663 Kaiserslautern, Germany.
| |
Collapse
|
3
|
Shanigaram B, Chitumalla RK, Bhanuprakash K. Adsorption of TCNQ and F4-TCNQ molecules on hydrogen-terminated Si(1 1 1) surface: van der Waals interactions included DFT study of the molecular orientations. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.03.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
4
|
Louant O, Champagne B, Liégeois V. Numerical differentiation method to calculate molecular properties at ground and excited states – Application to Julolidinemalononitrile. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.06.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
5
|
Stadtmüller B, Lüftner D, Willenbockel M, Reinisch EM, Sueyoshi T, Koller G, Soubatch S, Ramsey MG, Puschnig P, Tautz FS, Kumpf C. Unexpected interplay of bonding height and energy level alignment at heteromolecular hybrid interfaces. Nat Commun 2014; 5:3685. [PMID: 24739211 DOI: 10.1038/ncomms4685] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Accepted: 03/18/2014] [Indexed: 01/13/2023] Open
Abstract
Although geometric and electronic properties of any physical or chemical system are always mutually coupled by the rules of quantum mechanics, counterintuitive coincidences between the two are sometimes observed. The coadsorption of the organic molecules 3,4,9,10-perylene tetracarboxylic dianhydride and copper-II-phthalocyanine on Ag(111) represents such a case, since geometric and electronic structures appear to be decoupled: one molecule moves away from the substrate while its electronic structure indicates a stronger chemical interaction, and vice versa for the other. Our comprehensive experimental and ab-initio theoretical study reveals that, mediated by the metal surface, both species mutually amplify their charge-donating and -accepting characters, respectively. This resolves the apparent paradox, and demonstrates with exceptional clarity how geometric and electronic bonding parameters are intertwined at metal-organic interfaces.
Collapse
Affiliation(s)
- Benjamin Stadtmüller
- 1] Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany [2] Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany [3]
| | - Daniel Lüftner
- Institut für Physik, Karl-Franzens-Universität Graz, Graz 8010, Austria
| | - Martin Willenbockel
- 1] Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany [2] Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany
| | - Eva M Reinisch
- Institut für Physik, Karl-Franzens-Universität Graz, Graz 8010, Austria
| | - Tomoki Sueyoshi
- 1] Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany [2] Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany
| | - Georg Koller
- Institut für Physik, Karl-Franzens-Universität Graz, Graz 8010, Austria
| | - Serguei Soubatch
- 1] Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany [2] Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany
| | - Michael G Ramsey
- Institut für Physik, Karl-Franzens-Universität Graz, Graz 8010, Austria
| | - Peter Puschnig
- Institut für Physik, Karl-Franzens-Universität Graz, Graz 8010, Austria
| | - F Stefan Tautz
- 1] Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany [2] Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany
| | - Christian Kumpf
- 1] Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany [2] Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany
| |
Collapse
|