TY - JOUR
T1 - Tunable doping of graphene nanoribbon arrays by chemical functionalization
AU - Solís-Fernández, Pablo
AU - Bissett, Mark A.
AU - Tsuji, Masaharu
AU - Ago, Hiroki
N1 - Publisher Copyright:
© The Royal Society of Chemistry.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/2/28
Y1 - 2015/2/28
N2 - We demonstrate the controlled tuning of the electronic band structure of large-arrays of graphene nanoribbons (GNRs) by chemical functionalization. The GNR arrays are synthesized by substrate-controlled metal-assisted etching of graphene in H2 at high temperature, and functionalized with different molecules. From Raman spectroscopy and carrier transport measurements, we found that 4-nitrobenzenediazonium (4-NBD) and diethylene triamine (DETA) molecules can tune the doping level of the GNR arrays to p- and n-type, respectively. In both cases, the doping effects induced in the GNRs were found to be higher than for a pristine graphene sheet, due to the presence of a large quantity of edges. Effects of chemical doping on the Raman spectrum of sp2 carbon materials are also discussed. Our findings offer an effective way to control the electronic structure of GNRs by chemical functionalization, and are expected to facilitate the production of nanoribbon-based p-n junctions for future implementation into electronic circuits. This journal is
AB - We demonstrate the controlled tuning of the electronic band structure of large-arrays of graphene nanoribbons (GNRs) by chemical functionalization. The GNR arrays are synthesized by substrate-controlled metal-assisted etching of graphene in H2 at high temperature, and functionalized with different molecules. From Raman spectroscopy and carrier transport measurements, we found that 4-nitrobenzenediazonium (4-NBD) and diethylene triamine (DETA) molecules can tune the doping level of the GNR arrays to p- and n-type, respectively. In both cases, the doping effects induced in the GNRs were found to be higher than for a pristine graphene sheet, due to the presence of a large quantity of edges. Effects of chemical doping on the Raman spectrum of sp2 carbon materials are also discussed. Our findings offer an effective way to control the electronic structure of GNRs by chemical functionalization, and are expected to facilitate the production of nanoribbon-based p-n junctions for future implementation into electronic circuits. This journal is
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U2 - 10.1039/c4nr07007k
DO - 10.1039/c4nr07007k
M3 - Article
AN - SCOPUS:84923169382
VL - 7
SP - 3572
EP - 3580
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
IS - 8
ER -