visitant ::
identificació
|
|||||||||||||||
Cerca | Lliura | Ajuda | Servei de Biblioteques | Sobre el DDD | Català English Español |
Pàgina inicial > Articles > Articles publicats > Band Depopulation of Graphene Nanoribbons Induced by Chemical Gating with Amino Groups |
Data: | 2020 |
Resum: | The electronic properties of graphene nanoribbons (GNRs) can be precisely tuned by chemical doping. Here we demonstrate that amino (NH) functional groups attached at the edges of chiral GNRs (chGNRs) can efficiently gate the chGNRs and lead to the valence band (VB) depopulation on a metallic surface. The NH-doped chGNRs are grown by on-surface synthesis on Au(111) using functionalized bianthracene precursors. Scanning tunneling spectroscopy resolves that the NH groups significantly upshift the bands of chGNRs, causing the Fermi level crossing of the VB onset of chGNRs. Through density functional theory simulations we confirm that the hole-doping behavior is due to an upward shift of the bands induced by the edge NH groups. |
Ajuts: | Ministerio de Economía y Competitividad MAT2016-78293-C6 Ministerio de Economía y Competitividad FIS2017-83780-P Ministerio de Economía y Competitividad SEV-2017-0706 Ministerio de Economía y Competitividad MDM-2016-0618 European Commission 635919 European Commission 863098 |
Nota: | Altres ajuts: Xunta de Galicia (ED431G/09); Gobierno Vasco (IT1246-19, IT-1255-19); Diputación Foral de Gipuzkoa (RED 2019-096); CERCA Program/Generalitat de Catalunya; Program Interreg V-A España-Francia-Andorra (194/16 TNI) |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Publicat a: | ACS nano, Vol. 14, Issue 2 (February 2020) , p. 1895-1901, ISSN 1936-086X |
Postprint 21 p, 2.4 MB |