The Backside of Graphene: Manipulating Adsorption by Intercalation

The ease by which graphene is affected through contact with other materials is one of its unique features and defines an integral part of its potential for applications. Here, it will be demonstrated that intercalation, the insertion of atomic layers in between the backside of graphene and the suppo...

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Bibliographic Details
Published in:Nano letters Vol. 13; no. 11; pp. 5013 - 5019
Main Authors: Schumacher, Stefan, Wehling, Tim O, Lazić, Predrag, Runte, Sven, Förster, Daniel F, Busse, Carsten, Petrović, Marin, Kralj, Marko, Blügel, Stefan, Atodiresei, Nicolae, Caciuc, Vasile, Michely, Thomas
Format: Journal Article
Language:English
Published: Washington, DC American Chemical Society 13.11.2013
Subjects:
Binding energy
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Contact
Cross-disciplinary physics: materials science; rheology
Density functional theory
Doping
Electron states
Exact sciences and technology
Fullerenes and related materials; diamonds, graphite
Graphene
Insertion
Intercalation
Materials science
Methods of electronic structure calculations
Physics
Solid surfaces and solid-solid interfaces
Specific materials
Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)
doping
adsorption
work function
intercalation
STM
graphene
Europium additions
Scanning tunneling microscopy
Adsorption
Graphene
Binding energy
Adsorbates
Doping
Theoretical study
Density functional method
Nitrogen additions
Phosphorus additions
ISSN:1530-6984, 1530-6992, 1530-6992
Online Access:Get full text
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Summary:The ease by which graphene is affected through contact with other materials is one of its unique features and defines an integral part of its potential for applications. Here, it will be demonstrated that intercalation, the insertion of atomic layers in between the backside of graphene and the supporting substrate, is an efficient tool to change its interaction with the environment on the frontside. By partial intercalation of graphene on Ir(111) with Eu or Cs we induce strongly n-doped graphene patches through the contact with these intercalants. They coexist with nonintercalated, slightly p-doped graphene patches. We employ these backside doping patterns to directly visualize doping induced binding energy differences of ionic adsorbates to graphene through low-temperature scanning tunneling microscopy. Density functional theory confirms these binding energy differences and shows that they are related to the graphene doping level.
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ISSN:1530-6984
1530-6992
1530-6992
DOI:10.1021/nl402797j