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Graphene-based biosensor using transport properties

Rajib Chowdhury, Sondipon Adhikari, Paul Rees Orcid Logo, Steve Wilks, F. Scarpa

Physical Review B, Volume: 83, Issue: 4

Swansea University Authors: Rajib Chowdhury, Sondipon Adhikari, Paul Rees Orcid Logo, Steve Wilks

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DOI (Published version): 10.1103/physrevb.83.045401

Abstract

The potential of graphene nanoribbons (GNR’s) as molecular-scale sensors is investigated by calculating the electronic properties of the ribbon and the organic molecule ensemble. The organic molecule is assumed to be absorbed at the edge of a zigzag GNR. These nanostructures are described using a si...

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Published in: Physical Review B
ISSN: 1098-0121 1550-235X
Published: American Physical Society (APS) 2011
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URI: https://cronfa.swan.ac.uk/Record/cronfa6327
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spelling 2023-03-17T10:41:22.3435885 v2 6327 2013-01-21 Graphene-based biosensor using transport properties cb6c378733c1f732411646825fb9e289 Rajib Chowdhury Rajib Chowdhury true false 4ea84d67c4e414f5ccbd7593a40f04d3 Sondipon Adhikari Sondipon Adhikari true false 537a2fe031a796a3bde99679ee8c24f5 0000-0002-7715-6914 Paul Rees Paul Rees true false 948a547e27d969b7e192b4620688704d Steve Wilks Steve Wilks true false 2013-01-21 FGSEN The potential of graphene nanoribbons (GNR’s) as molecular-scale sensors is investigated by calculating the electronic properties of the ribbon and the organic molecule ensemble. The organic molecule is assumed to be absorbed at the edge of a zigzag GNR. These nanostructures are described using a single-band tight-binding Hamiltonian. Their transport spectrum and density of states are calculated using the nonequilibrium Green’s function formalism. The results show a significant suppression of the density of states (DOS), with a distinct response for the molecule. This may be promising for the prospect of GNR-based single-molecule sensors that might depend on the DOS (e.g., devices that respond to changes in either conductance or electroluminescence). Further, we have investigated the effect of doping on the transport properties of the system. The substitutional boron and nitrogen atoms are located at the center and edge of GNR’s. These dopant elements have significant influence on the transport characteristics of the system, particularly doping at the GNR edge. Journal Article Physical Review B 83 4 American Physical Society (APS) 1098-0121 1550-235X 3 1 2011 2011-01-03 10.1103/physrevb.83.045401 http://dx.doi.org/10.1103/physrevb.83.045401 The potential of graphene nanoribbons (GNR’s) as molecular-scale sensors is investigated by calculating the electronic properties of the ribbon and the organic molecule ensemble. The organic molecule is assumed to be absorbed at the edge of a zigzag GNR. These nanostructures are described using a single-band tight-binding Hamiltonian. Their transport spectrum and density of states are calculated using the nonequilibrium Green’s function formalism. The results show a significant suppression of the density of states (DOS), with a distinct response for the molecule. This may be promising for the prospect of GNR-based single-molecule sensors that might depend on the DOS (e.g., devices that respond to changes in either conductance or electroluminescence). Further, we have investigated the effect of doping on the transport properties of the system. The substitutional boron and nitrogen atoms are located at the center and edge of GNR’s. These dopant elements have significant influence on the transport characteristics of the system, particularly doping at the GNR edge.Impact Factor: 3.772 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2023-03-17T10:41:22.3435885 2013-01-21T06:02:11.0000000 Faculty of Science and Engineering School of Engineering and Applied Sciences - Biomedical Engineering Rajib Chowdhury 1 Sondipon Adhikari 2 Paul Rees 0000-0002-7715-6914 3 Steve Wilks 4 F. Scarpa 5
title Graphene-based biosensor using transport properties
spellingShingle Graphene-based biosensor using transport properties
Rajib Chowdhury
Sondipon Adhikari
Paul Rees
Steve Wilks
title_short Graphene-based biosensor using transport properties
title_full Graphene-based biosensor using transport properties
title_fullStr Graphene-based biosensor using transport properties
title_full_unstemmed Graphene-based biosensor using transport properties
title_sort Graphene-based biosensor using transport properties
author_id_str_mv cb6c378733c1f732411646825fb9e289
4ea84d67c4e414f5ccbd7593a40f04d3
537a2fe031a796a3bde99679ee8c24f5
948a547e27d969b7e192b4620688704d
author_id_fullname_str_mv cb6c378733c1f732411646825fb9e289_***_Rajib Chowdhury
4ea84d67c4e414f5ccbd7593a40f04d3_***_Sondipon Adhikari
537a2fe031a796a3bde99679ee8c24f5_***_Paul Rees
948a547e27d969b7e192b4620688704d_***_Steve Wilks
author Rajib Chowdhury
Sondipon Adhikari
Paul Rees
Steve Wilks
author2 Rajib Chowdhury
Sondipon Adhikari
Paul Rees
Steve Wilks
F. Scarpa
format Journal article
container_title Physical Review B
container_volume 83
container_issue 4
publishDate 2011
institution Swansea University
issn 1098-0121
1550-235X
doi_str_mv 10.1103/physrevb.83.045401
publisher American Physical Society (APS)
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Biomedical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Biomedical Engineering
url http://dx.doi.org/10.1103/physrevb.83.045401
document_store_str 0
active_str 0
description The potential of graphene nanoribbons (GNR’s) as molecular-scale sensors is investigated by calculating the electronic properties of the ribbon and the organic molecule ensemble. The organic molecule is assumed to be absorbed at the edge of a zigzag GNR. These nanostructures are described using a single-band tight-binding Hamiltonian. Their transport spectrum and density of states are calculated using the nonequilibrium Green’s function formalism. The results show a significant suppression of the density of states (DOS), with a distinct response for the molecule. This may be promising for the prospect of GNR-based single-molecule sensors that might depend on the DOS (e.g., devices that respond to changes in either conductance or electroluminescence). Further, we have investigated the effect of doping on the transport properties of the system. The substitutional boron and nitrogen atoms are located at the center and edge of GNR’s. These dopant elements have significant influence on the transport characteristics of the system, particularly doping at the GNR edge.
published_date 2011-01-03T03:07:47Z
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score 11.016235

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