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Some Like It Flat: Decoupled h-BN Monolayer Substrates for Aligned Graphene Growth

Publications associées (68)

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Scanning photocurrent microscopy of carbon nanostructures

In this thesis, the electronic structures of low-dimensional carbon allotropes have been studied. In particular, the spatially-resolved photocurrent responses of devices comprising carbon nanostructures were investigated through scanning photocurrent micro ...

EPFL2009

Magnetoresistive junctions based on epitaxial graphene and hexagonal boron nitride

Alfredo Pasquarello, Oleg Yazyev

We propose monolayer epitaxial graphene and hexagonal boron nitride (h-BN) as ultimate thickness covalent spacers for magnetoresistive junctions. Using a first-principles approach, we investigate the structural, magnetic, and spin transport properties of s ...

2009

Chemical Vapor Deposition Repair of Graphene Oxide: A Route to Highly Conductive Graphene Monolayers

Klaus Kern, Marko Burghard, Ravi Shankar Sundaram

Highly conductive chemically derived graphene can be synthesized using an efficient two-step method starting from graphene oxide. The key strategy involves the use of a CVD process to heal defects contained within the monolayers, which imparts a two order ...

2009

Spin Channels in Functionalized Graphene Nanoribbons

Nicola Marzari

We characterize the transport of functionalized graphene nanoribbons using extensive first-principles calculations based on density functional theory (DFT) that encompass both monovalent and divalent ligands, hydrogenated defects, and vacancies. We find th ...

2009

Spatial modulation of the Dirac gap in epitaxial graphene

Klaus Kern

We use scanning tunneling spectroscopy (STS) at low temperatures to investigate the local electronic structure of mono- and bilayer graphene grown epitaxially on SiC(0001). Already for monolayer graphene, a gap opening is observed in the pi-bands at the Di ...

2008

Near-edge x-ray absorption fine-structure investigation of graphene

Marco Grioni, Daniela Pacilè

We report the near-edge x-ray absorption fine-structure (NEXAFS) spectrum of a single layer of graphite (graphene) obtained by micromechanical cleavage of highly ordered pyrolytic graphite on a SiO2 substrate. We utilized a photoemission electron microscop ...

American Physical Society2008

Electrochemical modification of graphene

Klaus Kern, Marko Burghard, Kannan Balasubramanian, Ravi Shankar Sundaram

Nanoparticles on an atomic carpet: Individual graphene sheets have been decorated with metal nanoparticles through electrochemistry. The attachment of Pd particles onto graphene renders it sensitive to hydrogen. The controlled functionalization of graphene ...

2008

Monolayer-Confined Mixing at the Ag-Pt(111) Interface

Klaus Kern, Harald Brune

The present tunneling microscopy study reveals that the growth of silver on Pt(111) at substrate temperatures above 620 K results in the formation of a two-dimensional alloy consisting of Ag clusters dissolved in the Pt layer [THETA(Ag)

American Physical Society1993