http://www.cnr.it/ontology/cnr/individuo/prodotto/ID283484
Probing the mechanism for graphene nanoribbon formation on gold surfaces through X-ray spectroscopy (Articolo in rivista)
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- Probing the mechanism for graphene nanoribbon formation on gold surfaces through X-ray spectroscopy (Articolo in rivista) (literal)
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- 2014-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1039/C4SC01584C (literal)
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A. Batra [1], D. Cvetko[2,3], G. Kladnik [2,3, O. Adak [1], C. Cardoso [4], A. Ferretti [4], D. Prezzi [4], E. Molinari [4,5] , A. Morgante[3,6], and L. Venkataraman [1] (2014)
Probing the mechanism for graphene nanoribbon formation on gold surfaces through X-ray spectroscopy
in Chemical science (Online); RSC Publishing, Cambridge (Regno Unito)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- A. Batra [1], D. Cvetko[2,3], G. Kladnik [2,3, O. Adak [1], C. Cardoso [4], A. Ferretti [4], D. Prezzi [4], E. Molinari [4,5] , A. Morgante[3,6], and L. Venkataraman [1] (literal)
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- http://pubs.rsc.org/en/Content/ArticleLanding/2014/SC/C4SC01584C#!divAbstract (literal)
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- [1]Department of Applied Physics and Applied Mathematics, Columbia University, New York, USA
[2]Department of Physics, University of Ljubljana, Ljubljana, Slovenia
[3]CNR-IOM Laboratorio Nazionale TASC, Basovizza SS-14, km 163.5, I-34012 Trieste, Italy
[4]Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, Modena, Italy
[5]Department of Physics, Mathematics and Informatics, University of Modena and Reggio Emilia, Modena, Italy
[6]Department of Physics, University of Trieste, Trieste, Italy (literal)
- Titolo
- Probing the mechanism for graphene nanoribbon formation on gold surfaces through X-ray spectroscopy (literal)
- Abstract
- We studied the formation of graphene nanoribbons (GNRs) via the self-assembly of 10,10?-dibromo-9,9?-bianthryl precursor molecules on gold surfaces with different synchrotron spectroscopies. Through X-ray photoemission spectroscopy core-level shifts, we followed each step of the synthetic process, and could show that the Br-C bonds of the precursors cleave at temperatures as low as 100 °C on both Au(111) and Au(110). We established that the resulting radicals bind to Au, forming Au-C and Au-Br bonds. We show that the polymerization of the precursors follows Br desorption from Au, suggesting that the presence of halogens is the limiting factor in this step. Finally, with angle-resolved ultraviolet photoemission spectroscopy and density functional theory we show that the GNR/Au interaction results in an upshift of the Shockley surface state of Au(111) by [similar]0.14 eV, together with an increased electron effective mass. (literal)
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