Electronic Decoupling and Hole-Doping of Graphene Nanoribbons on Metal Substrates by Chloride Intercalation

被引：1

作者：

Kinikar, Amogh ^{[1
]}

Englmann, Thorsten G. ^{[3
,4
]}

Di Giovannantonio, Marco ^{[1
,2
]}

Bassi, Nicolo ^{[1
]}

Xiang, Feifei ^{[1
]}

Stolz, Samuel ^{[1
,5
]}

Widmer, Roland ^{[1
]}

Barin, Gabriela Borin ^{[1
]}

Turco, Elia ^{[1
]}

Eimre, Kristjan ^{[1
,6
]}

Diez, Nestor Merino ^{[1
]}

Ortega-Guerrero, Andres ^{[1
]}

Feng, Xinliang ^{[3
,4
,7
]}

Groning, Oliver ^{[1
]}

Pignedoli, Carlo A. ^{[1
]}

Fasel, Roman ^{[1
,8
]}

Ruffieux, Pascal ^{[1
]}

机构：

[1] Swiss Fed Labs Mat Sci & Technol, Nanotech Surfaces Lab, Empa, CH-8600 Dubendorf, Switzerland

[2] CNR, Ist Struttura Mat, ISM, Via Fossodel Cavaliere 100, I-00133 Rome, Italy

[3] Tech Univ Dresden, Ctr Adv Elect Dresden, D-01062 Dresden, Germany

[4] Tech Univ Dresden, Fac Chem & Food Chem, D-01062 Dresden, Germany

[5] Ecole Polytech Fed Lausanne, Inst Phys, Lab Nanostruct Surfaces, CH-1015 Lausanne, Switzerland

[6] Ecole Polytech Fed Lausanne, EPFL, NCCR, MARVEL, CH-1015 Lausanne, Switzerland

[7] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany

[8] Univ Bern, Dept Chem Biochem & Pharmaceut Sci, CH-3012 Bern, Switzerland

来源：

ACS NANO | 2024年 / 18卷 / 26期

基金：

瑞士国家科学基金会;

关键词：

graphene nanoribbons; on-surface synthesis; electronic doping; electronic decoupling; intercalation; ATOMIC-FORCE MICROSCOPY; AU(111) SURFACE; MOLECULES; DYNAMICS; RANGE;

D O I：

10.1021/acsnano.4c00484

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Atomically precise graphene nanoribbons (GNRs) have a wide range of electronic properties that depend sensitively on their chemical structure. Several types of GNRs have been synthesized on metal surfaces through selective surface-catalyzed reactions. The resulting GNRs are adsorbed on the metal surface, which may lead to hybridization between the GNR orbitals and those of the substrate. This makes investigation of the intrinsic electronic properties of GNRs more difficult and also rules out capacitive gating. Here, we demonstrate the formation of a dielectric gold chloride adlayer that can intercalate underneath GNRs on the Au(111) surface. The intercalated gold chloride adlayer electronically decouples the GNRs from the metal and leads to a substantial hole-doping of the GNRs. Our results introduce an easily accessible tool in the in situ characterization of GNRs grown on Au(111) that allows for exploration of their electronic properties in a heavily hole-doped regime.

引用

页码：16622 / 16631

页数：10

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