TY - JOUR
T1 - Laterally extended atomically precise graphene nanoribbons with improved electrical conductivity for efficient gas sensing
AU - Mehdi Pour, Mohammad
AU - Lashkov, Andrey
AU - Radocea, Adrian
AU - Liu, Ximeng
AU - Sun, Tao
AU - Lipatov, Alexey
AU - Korlacki, Rafal A.
AU - Shekhirev, Mikhail
AU - Aluru, Narayana R.
AU - Lyding, Joseph W.
AU - Sysoev, Victor
AU - Sinitskii, Alexander
N1 - The work was supported by the Office of Naval Research (ONR) through grants N00014-16-1-2899, N00016-16-1-2899 and N00014-16-1-3151. Synthesis of graphene nanor-ibbons was supported by the National Science Foundation (NSF) through CHE-1455330. The materials characterization was performed in part in the Nebraska Nanoscale Facility: National Nanotechnology Coordinated Infrastructure and the Nebraska Center for Materials and Nanoscience, which are supported by the NSF (ECCS-1542182) and the Nebraska Research Initiative, an in MISIS where the work was supported by the Ministry of Education and Science of the Russian Federation (K2-2016-033). Parts of the DFT calculations were performed using the resources of the Holland Computing Center and the Center for Nanohybrid Functional Materials at the University of Nebraska-Lincoln, the latter facility supported by the NSF award EPS-1004094. An.L. and V.S. thank the Ministry of Education and Science of the Russian Federation for support through the grant no. 16.1119.2017/4.6. DFT/GW band structure calculations were performed on the Blue Waters supercomputer resource provided by the University of Illinois. T.S. and N.R. A are supported by AFOSR under grant #FA9550-12-1-0464 and by the NSF under grants 1264282, 1420882, 1506619, and 1545907.
PY - 2017/12/1
Y1 - 2017/12/1
N2 - Narrow atomically precise graphene nanoribbons hold great promise for electronic and optoelectronic applications, but the previously demonstrated nanoribbon-based devices typically suffer from low currents and mobilities. In this study, we explored the idea of lateral extension of graphene nanoribbons for improving their electrical conductivity. We started with a conventional chevron graphene nanoribbon, and designed its laterally extended variant. We synthesized these new graphene nanoribbons in solution and found that the lateral extension results in decrease of their electronic bandgap and improvement in the electrical conductivity of nanoribbon-based thin films. These films were employed in gas sensors and an electronic nose system, which showed improved responsivities to low molecular weight alcohols compared to similar sensors based on benchmark graphitic materials, such as graphene and reduced graphene oxide, and a reliable analyte recognition. This study shows the methodology for designing new atomically precise graphene nanoribbons with improved properties, their bottom-up synthesis, characterization, processing and implementation in electronic devices.
AB - Narrow atomically precise graphene nanoribbons hold great promise for electronic and optoelectronic applications, but the previously demonstrated nanoribbon-based devices typically suffer from low currents and mobilities. In this study, we explored the idea of lateral extension of graphene nanoribbons for improving their electrical conductivity. We started with a conventional chevron graphene nanoribbon, and designed its laterally extended variant. We synthesized these new graphene nanoribbons in solution and found that the lateral extension results in decrease of their electronic bandgap and improvement in the electrical conductivity of nanoribbon-based thin films. These films were employed in gas sensors and an electronic nose system, which showed improved responsivities to low molecular weight alcohols compared to similar sensors based on benchmark graphitic materials, such as graphene and reduced graphene oxide, and a reliable analyte recognition. This study shows the methodology for designing new atomically precise graphene nanoribbons with improved properties, their bottom-up synthesis, characterization, processing and implementation in electronic devices.
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U2 - 10.1038/s41467-017-00692-4
DO - 10.1038/s41467-017-00692-4
M3 - Article
C2 - 29018185
AN - SCOPUS:85031006224
SN - 2041-1723
VL - 8
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 820
ER -