DataVXACS NanoPaper
journal article·2020-02-25Open access

Band Depopulation of Graphene Nanoribbons Induced by Chemical Gating with Amino Groups

Jingcheng Li, Pedro Brandimarte, Manuel Vilas-Varela, Nestor Merino-Díez, Cesar Moreno, Aitor Mugarza, Jaime Sáez Mollejo, Daniel Sánchez-Portal, Dimas Garcia de Oteyza, Martina Corso, Aran Garcia-Lekue, Diego Peña, Jose Ignacio Pascual

ACS Nano· Volume 14· Issue 2
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Source abstract

Abstract

The electronic properties of graphene nanoribbons (GNRs) can be precisely tuned by chemical doping. Here we demonstrate that amino (NH2) 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 NH2-doped chGNRs are grown by on-surface synthesis on Au(111) using functionalized bianthracene precursors. Scanning tunneling spectroscopy resolves that the NH2 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 NH2 groups.
Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Graphene research and applications · Surface Chemistry and Catalysis · Molecular Junctions and Nanostructures

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CIC nanoGUNE BRTA, Tolosa Hiribidea 76, 20018 Donostia-San Sebastian, Spain

Donostia International Physics Center (DIPC), 20018 Donostia-San Sebastián, Spain

Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela,15782 Santiago de Compostela, Spain

Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain

ICREA Institució Catalana de Recerca i Estudis Avancats, Lluis Companys 23, 08010 Barcelona, Spain

Centro de Física de Materiales MPC (CSIC-UPV/EHU), 20018 Donostia-San Sebastián, Spain

Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain

Funding

European Regional Development Fund · Ministerio de Econom?a y Competitividad · H2020 Future and Emerging Technologies · Eusko Jaurlaritza · Xunta de Galicia · Euskal Herriko Unibertsitatea · Generalitat de Catalunya · H2020 European Research Council · Agencia Estatal de Investigaci?n

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