p Band Dispersion Along Conjugated Organic Nanowires Synthesized on a Metal Oxide Semiconductor
Vasseur, G. ; Abadia, M. ; Miccio, L.A. ; Brede, J. ; Garcia-Lekue, A. ; De Oteyza, D.G. ; Rogero, C. ; Lobo-Checa, J. ; Ortega, J.E.
Resumen: Surface-confined dehalogenation reactions are versatile bottom-up approaches for the synthesis of carbonbased nanostructures with predefined chemical properties. However, for devices generally requiring low-conductivity substrates, potential applications are so far severely hampered by the necessity of a metallic surface to catalyze the reactions. In this work we report the synthesis of ordered arrays of poly(p-phenylene) chains on the surface of semiconducting TiO2(110) via a dehalogenative homocoupling of 4, 4¿- dibromoterphenyl precursors. The supramolecular phase is clearly distinguished from the polymeric one using low-energy electron diffraction and scanning tunneling microscopy as the substrate temperature used for deposition is varied. X-ray photoelectron spectroscopy of C 1s and Br 3d core levels traces the temperature of the onset of dehalogenation to around 475 K. Moreover, angle-resolved photoemission spectroscopy and tightbinding calculations identify a highly dispersive band characteristic of a substantial overlap between the precursor''s p states along the polymer, considered as the fingerprint of a successful polymerization. Thus, these results establish the first spectroscopic evidence that atomically precise carbon-based nanostructures can readily be synthesized on top of a transition-metal oxide surface, opening the prospect for the bottom-up production of novel molecule-semiconductor devices.
Idioma: Inglés
DOI: 10.1021/jacs.6b02151
Año: 2016
Publicado en: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 138, 17 (2016), 5685-5692
ISSN: 0002-7863
Factor impacto JCR: 13.858 (2016)
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 10 / 166 = 0.06 (2016) - Q1 - T1
Factor impacto SCIMAGO: 7.492 - Biochemistry (Q1) - Colloid and Surface Chemistry (Q1) - Chemistry (miscellaneous) (Q1) - Catalysis (Q1)
Financiación: info:eu-repo/grantAgreement/EC/FP7/610446/EU/Planar Atomic and Molecular Scale devices/PAMS
Financiación: info:eu-repo/grantAgreement/EC/H2020/635919/EU/Functional materials from on-surface linkage of molecular precursors/SURFINK
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-46593-C6-2-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-46593-C6-4-P
Tipo y forma: Article (Published version)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
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Idioma: Inglés
DOI: 10.1021/jacs.6b02151
Año: 2016
Publicado en: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 138, 17 (2016), 5685-5692
ISSN: 0002-7863
Factor impacto JCR: 13.858 (2016)
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 10 / 166 = 0.06 (2016) - Q1 - T1
Factor impacto SCIMAGO: 7.492 - Biochemistry (Q1) - Colloid and Surface Chemistry (Q1) - Chemistry (miscellaneous) (Q1) - Catalysis (Q1)
Financiación: info:eu-repo/grantAgreement/EC/FP7/610446/EU/Planar Atomic and Molecular Scale devices/PAMS
Financiación: info:eu-repo/grantAgreement/EC/H2020/635919/EU/Functional materials from on-surface linkage of molecular precursors/SURFINK
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-46593-C6-2-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-46593-C6-4-P
Tipo y forma: Article (Published version)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2020-02-21-13:47:25)
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Record created 2017-06-28, last modified 2020-02-21