Single- and double-sided chemical functionalization of bilayer graphene

A. Felten, B.S. Flavel, M. Hirtz, L. Britnell, A. Eckmann, P. Louette, J.-J. Pireaux, R. Krupke, C. Casiraghi

Research output: Contribution to journalArticle

Abstract

An experimental study on the interaction between the top and bottom layer of a chemically functionalized graphene bilayer by mild oxygen plasma is reported. Structural, chemical, and electrical properties are monitored using Raman spectroscopy, transport measurements, conductive atomic force microscopy and X-ray photoelectron spectroscopy. Single- and double-sided chemical functionalization are found to give very different results: single-sided modified bilayers show relatively high mobility (200-600 cm V s at room temperature) and a stable structure with a limited amount of defects, even after long plasma treatment (>60 s). This is attributed to preferential modification and limited coverage of the top layer during plasma exposure, while the bottom layer remains almost unperturbed. This could eventually lead to decoupling between top and bottom layers. Double-sided chemical functionalization leads to a structure containing a high concentration of defects, very similar to graphene oxide. This opens the possibility to use plasma treatment not only for etching and patterning of graphene, but also to make heterostructures (through single-sided modification of bilayers) for sensors and transistors and new graphene-derivatives materials (through double-sided modification). Single- and double-sided chemical functionalization of bilayer graphene is performed using mild oxygen plasma. A single-sided modified bilayer shows relatively high mobility and a stable structure with a limited amount of defects, even after long plasma treatment. Double-sided chemical functionalization leads to a structure containing a high concentration of defects, very similar to graphene oxide.
Original languageEnglish
Pages (from-to)631-639
Number of pages9
JournalSmall (Weinheim an der Bergstrasse, Germany)
Volume9
Issue number4
DOIs
Publication statusPublished - 25 Feb 2013

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Graphite
Graphene
Plasmas
Defects
Oxides
Oxygen
Photoelectron Spectroscopy
Raman Spectrum Analysis
Atomic Force Microscopy
Chemical properties
Raman spectroscopy
Heterojunctions
Structural properties
Etching
Atomic force microscopy
Transistors
Electric properties
X ray photoelectron spectroscopy
Derivatives
Temperature

Cite this

Felten, A. ; Flavel, B.S. ; Hirtz, M. ; Britnell, L. ; Eckmann, A. ; Louette, P. ; Pireaux, J.-J. ; Krupke, R. ; Casiraghi, C. / Single- and double-sided chemical functionalization of bilayer graphene. In: Small (Weinheim an der Bergstrasse, Germany). 2013 ; Vol. 9, No. 4. pp. 631-639.
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Single- and double-sided chemical functionalization of bilayer graphene. / Felten, A.; Flavel, B.S.; Hirtz, M.; Britnell, L.; Eckmann, A.; Louette, P.; Pireaux, J.-J.; Krupke, R.; Casiraghi, C.

In: Small (Weinheim an der Bergstrasse, Germany), Vol. 9, No. 4, 25.02.2013, p. 631-639.

Research output: Contribution to journalArticle

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T1 - Single- and double-sided chemical functionalization of bilayer graphene

AU - Felten, A.

AU - Flavel, B.S.

AU - Hirtz, M.

AU - Britnell, L.

AU - Eckmann, A.

AU - Louette, P.

AU - Pireaux, J.-J.

AU - Krupke, R.

AU - Casiraghi, C.

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