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Efficient Transfer Doping of Carbon Nanotube Forests by MoO3

Santiago Esconjauregui, Lorenzo D’Arsié, Yuzheng Guo Orcid Logo, Junwei Yang, Hisashi Sugime, Sabina Caneva, Cinzia Cepek, John Robertson

ACS Nano, Volume: 9, Issue: 10, Pages: 10422 - 10430

Swansea University Author: Yuzheng Guo Orcid Logo

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DOI (Published version): 10.1021/acsnano.5b04644

Abstract

We dope nanotube forests using evaporated MoO3 and observe the forest resistivity to decrease by 2 orders of magnitude, reaching values as low as ∼5 × 10–5 Ωcm, thus approaching that of copper. Using in situ photoemission spectroscopy, we determine the minimum necessary MoO3 thickness to dope a fore...

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Published in: ACS Nano
ISSN: 1936-0851 1936-086X
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa32125
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first_indexed 2017-02-27T14:06:09Z
last_indexed 2021-09-25T02:48:04Z
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spelling 2021-09-24T14:46:06.4958515 v2 32125 2017-02-27 Efficient Transfer Doping of Carbon Nanotube Forests by MoO3 2c285ab01f88f7ecb25a3aacabee52ea 0000-0003-2656-0340 Yuzheng Guo Yuzheng Guo true false 2017-02-27 GENG We dope nanotube forests using evaporated MoO3 and observe the forest resistivity to decrease by 2 orders of magnitude, reaching values as low as ∼5 × 10–5 Ωcm, thus approaching that of copper. Using in situ photoemission spectroscopy, we determine the minimum necessary MoO3 thickness to dope a forest and study the underlying doping mechanism. Homogenous coating and tube compaction emerge as key factors for decreasing the forest resistivity. When all nanotubes are fully coated with MoO3 and packed, conduction channels are created both inside the nanotubes and on the outside oxide layer. This is supported by density functional theory calculations, which show a shift of the Fermi energy of the nanotubes and the conversion of the oxide into a layer of metallic character. MoO3 doping removes the need for chirality control during nanotube growth and represents a step forward toward the use of forests in next-generation electronics and in power cables or conductive polymers. Journal Article ACS Nano 9 10 10422 10430 1936-0851 1936-086X 31 12 2015 2015-12-31 10.1021/acsnano.5b04644 COLLEGE NANME General Engineering COLLEGE CODE GENG Swansea University 2021-09-24T14:46:06.4958515 2017-02-27T11:13:27.9063480 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - General Engineering Santiago Esconjauregui 1 Lorenzo D’Arsié 2 Yuzheng Guo 0000-0003-2656-0340 3 Junwei Yang 4 Hisashi Sugime 5 Sabina Caneva 6 Cinzia Cepek 7 John Robertson 8
title Efficient Transfer Doping of Carbon Nanotube Forests by MoO3
spellingShingle Efficient Transfer Doping of Carbon Nanotube Forests by MoO3
Yuzheng Guo
title_short Efficient Transfer Doping of Carbon Nanotube Forests by MoO3
title_full Efficient Transfer Doping of Carbon Nanotube Forests by MoO3
title_fullStr Efficient Transfer Doping of Carbon Nanotube Forests by MoO3
title_full_unstemmed Efficient Transfer Doping of Carbon Nanotube Forests by MoO3
title_sort Efficient Transfer Doping of Carbon Nanotube Forests by MoO3
author_id_str_mv 2c285ab01f88f7ecb25a3aacabee52ea
author_id_fullname_str_mv 2c285ab01f88f7ecb25a3aacabee52ea_***_Yuzheng Guo
author Yuzheng Guo
author2 Santiago Esconjauregui
Lorenzo D’Arsié
Yuzheng Guo
Junwei Yang
Hisashi Sugime
Sabina Caneva
Cinzia Cepek
John Robertson
format Journal article
container_title ACS Nano
container_volume 9
container_issue 10
container_start_page 10422
publishDate 2015
institution Swansea University
issn 1936-0851
1936-086X
doi_str_mv 10.1021/acsnano.5b04644
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 Aerospace, Civil, Electrical, General and Mechanical Engineering - General Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - General Engineering
document_store_str 0
active_str 0
description We dope nanotube forests using evaporated MoO3 and observe the forest resistivity to decrease by 2 orders of magnitude, reaching values as low as ∼5 × 10–5 Ωcm, thus approaching that of copper. Using in situ photoemission spectroscopy, we determine the minimum necessary MoO3 thickness to dope a forest and study the underlying doping mechanism. Homogenous coating and tube compaction emerge as key factors for decreasing the forest resistivity. When all nanotubes are fully coated with MoO3 and packed, conduction channels are created both inside the nanotubes and on the outside oxide layer. This is supported by density functional theory calculations, which show a shift of the Fermi energy of the nanotubes and the conversion of the oxide into a layer of metallic character. MoO3 doping removes the need for chirality control during nanotube growth and represents a step forward toward the use of forests in next-generation electronics and in power cables or conductive polymers.
published_date 2015-12-31T03:39:19Z
_version_ 1763751766112862208
score 11.012678

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