Laterally extended atomically precise graphene nanoribbons with improved electrical conductivity for efficient gas sensing.

Autor:	Mehdi Pour M; Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA., Lashkov A; Department of Physics, Gagarin State Technical University of Saratov, Saratov, 410054, Russia., Radocea A; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA.; Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA., Liu X; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA.; Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA., Sun T; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA.; Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA., Lipatov A; Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA., Korlacki RA; Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA., Shekhirev M; Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA., Aluru NR; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA.; Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA., Lyding JW; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA.; Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA., Sysoev V; Department of Physics, Gagarin State Technical University of Saratov, Saratov, 410054, Russia.; National University of Science and Technology MISIS, Moscow, 119991, Russia., Sinitskii A; Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA. sinitskii@unl.edu.; Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA. sinitskii@unl.edu.
Jazyk:	angličtina
Zdroj:	Nature communications [Nat Commun] 2017 Oct 10; Vol. 8 (1), pp. 820. Date of Electronic Publication: 2017 Oct 10.
DOI:	10.1038/s41467-017-00692-4
Abstrakt:	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.Atomically precise graphene nanoribbons are a promising platform for tailored electron transport, yet they suffer from low conductivity. Here, the authors devise a strategy to laterally extend conventional chevron nanoribbons, thus achieving increased electrical conductivity and improved chemical sensing capabilities.
Databáze:	MEDLINE
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