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Realization of eith...
Realization of either physisorption or chemisorption of 2H-tetraphenylporphyrin on the Cu(111) from density functional theory
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- Naseri, Shabnam (författare)
- Luleå tekniska universitet,Materialvetenskap
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- Abbas, Ghulam Gilani (författare)
- Luleå tekniska universitet,Maskinelement
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- Johansson, Gustav (författare)
- Luleå tekniska universitet,Materialvetenskap
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- Koumpouras, Konstantinos (författare)
- Luleå tekniska universitet,Materialvetenskap
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- Baran, Jakub D. (författare)
- Luleå tekniska universitet,Materialvetenskap
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- Larsson, J. Andreas (författare)
- Luleå tekniska universitet,Materialvetenskap
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(creator_code:org_t)
- Institute of Physics (IOP), 2024
- 2024
- Engelska.
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Ingår i: Journal of Physics. - : Institute of Physics (IOP). - 0953-8984 .- 1361-648X. ; 36
- Relaterad länk:
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https://doi.org/10.1...
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https://ltu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The adsorption of organic molecules to surfaces is a central issue to achieve fully-functional molecular devices, for which porphyrins are well-studied due to their chemical stability and functional diversity. Herein, we investigate both the physical and the chemical adsorption of the free-base tetraphenylporphyrin 2H-TPP on the Cu(111) surface within the framework of density functional theory and find that the most stable physisorbed configuration is more weakly bound by -0.36 eV than the chemisorbed configuration. We use the electron localization function to investigate the difference in binding mechanisms between strong physisorption and weak chemisorption. We have computed a reaction barrier of 0.12 eV in going from physical binding to chemical bonding to the surface, and a barrier of 50 meV in going between neighboring physical binding sites. Our results support the possibility of realizing free-base porphyrins either physisorbed or chemisorbed on Cu(111) depending on the deposition procedure and experimental conditions.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- firs-principles calculations
- electron localization function (ELF)
- chemisorption
- physisorption
- porphyrin
- Applied Physics
- Tillämpad fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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