Detail publikačního výsledku

Synthesis of Graphene Nanoribbons on a Kinked Au Surface: Revealing the Frontier Valence Band at the Brillouin Zone Center

El-Sayed, A.; Piquero-Zulaica, I.; Abd El-Fattah, ZM.; Kormos, L.; Ali, K.; Weber, A.; Brede, J.; de Oteyza, DG. ; Lobo-Checa, J.; Ortega, JE.; Corso, M

Originální název

Synthesis of Graphene Nanoribbons on a Kinked Au Surface: Revealing the Frontier Valence Band at the Brillouin Zone Center

Anglický název

Synthesis of Graphene Nanoribbons on a Kinked Au Surface: Revealing the Frontier Valence Band at the Brillouin Zone Center

Druh

Článek WoS

Originální abstrakt

Graphene nanoribbons (GNRs) can be synthesized with atomic precision through on-surface chemistry of self-assembled organic precursors on metal surfaces. Here, we examine the growth of seven-armchair GNRs (7-AGNRs) on the Au(16 14 15) vicinal surface, namely, a surface vicinal to Au(111) that features kinked steps. During the thermal activation of the polymerization and cyclodehydrogenation processes that produce the GNRs, the kinked substrate undergoes a strong step-edge reshaping, accompanied by a massive missing-row reconstruction within (111) terraces that aligns GNRs preferentially along two equivalent [1 (1) over bar0] directions. Using angle-resolved photoemission, we are able to detect the occupied frontier band of the 7-AGNR at the center of the first Brillouin zone, as predicted by theoretical calculations. This allows to unambiguously determine the relevant 7-AGNR band properties, namely, energy and effective mass.

Anglický abstrakt

Graphene nanoribbons (GNRs) can be synthesized with atomic precision through on-surface chemistry of self-assembled organic precursors on metal surfaces. Here, we examine the growth of seven-armchair GNRs (7-AGNRs) on the Au(16 14 15) vicinal surface, namely, a surface vicinal to Au(111) that features kinked steps. During the thermal activation of the polymerization and cyclodehydrogenation processes that produce the GNRs, the kinked substrate undergoes a strong step-edge reshaping, accompanied by a massive missing-row reconstruction within (111) terraces that aligns GNRs preferentially along two equivalent [1 (1) over bar0] directions. Using angle-resolved photoemission, we are able to detect the occupied frontier band of the 7-AGNR at the center of the first Brillouin zone, as predicted by theoretical calculations. This allows to unambiguously determine the relevant 7-AGNR band properties, namely, energy and effective mass.

Klíčová slova

Graphene Nanoribons; Surfaces, ARPES

Klíčová slova v angličtině

Graphene Nanoribons; Surfaces, ARPES

Autoři

El-Sayed, A.; Piquero-Zulaica, I.; Abd El-Fattah, ZM.; Kormos, L.; Ali, K.; Weber, A.; Brede, J.; de Oteyza, DG. ; Lobo-Checa, J.; Ortega, JE.; Corso, M

Rok RIV

2021

Vydáno

16.07.2020

Nakladatel

AMER CHEMICAL SOC

Místo

WASHINGTON

ISSN

1932-7455

Periodikum

Journal of Physical Chemistry C

Svazek

124

Číslo

28

Stát

Spojené státy americké

Strany od

15474

Strany do

15480

Strany počet

7

URL

https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.0c02801

BibTex

@article{BUT165424,
  author="El-Sayed, A. and Piquero-Zulaica, I. and Abd El-Fattah, ZM. and Kormos, L. and Ali, K. and Weber, A. and Brede, J. and de Oteyza, DG. and Lobo-Checa, J. and Ortega, JE. and Corso, M",
  title="Synthesis of Graphene Nanoribbons on a Kinked Au Surface: Revealing the Frontier Valence Band at the Brillouin Zone Center",
  journal="Journal of Physical Chemistry C",
  year="2020",
  volume="124",
  number="28",
  pages="15474--15480",
  doi="10.1021/acs.jpcc.0c02801",
  issn="1932-7447",
  url="https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.0c02801"
}