TU Darmstadt / ULB / TUbiblio

Single- and Double-Sided Chemical Functionalization of Bilayer Graphene

Felten, Alexandre and Flavel, Benjamin S. and Britnell, Liam and Eckmann, Axel and Louette, Pierre and Pireaux, Jean-Jacques and Hirtz, Michael and Krupke, Ralph and Casiraghi, Cinzia (2012):
Single- and Double-Sided Chemical Functionalization of Bilayer Graphene.
In: Small, 9 (4), WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, pp. 631-639, ISSN 16136810,
[Online-Edition: http://dx.doi.org/10.1002/smll.201202214],
[Article]

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 cm2 V−1 s−1 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).

Item Type: Article
Erschienen: 2012
Creators: Felten, Alexandre and Flavel, Benjamin S. and Britnell, Liam and Eckmann, Axel and Louette, Pierre and Pireaux, Jean-Jacques and Hirtz, Michael and Krupke, Ralph and Casiraghi, Cinzia
Title: Single- and Double-Sided Chemical Functionalization of Bilayer Graphene
Language: English
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 cm2 V−1 s−1 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).

Journal or Publication Title: Small
Volume: 9
Number: 4
Publisher: WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Uncontrolled Keywords: bilayer graphene, oxygen plasma, Raman spectroscopy, transport measurements, DNA
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 28 Feb 2013 09:03
Official URL: http://dx.doi.org/10.1002/smll.201202214
Identification Number: doi:10.1002/smll.201202214
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details