Simple fabrication of single-walled carbon nanotube films and electrical property control via nitrosonium salt doping.
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| Title: | Simple fabrication of single-walled carbon nanotube films and electrical property control via nitrosonium salt doping. |
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| Authors: | Imae, Ichiro1 (AUTHOR) imae@hiroshima-u.ac.jp, Morimoto, Miki1 (AUTHOR), Imato, Keiichi1 (AUTHOR), Ooyama, Yousuke1 (AUTHOR) |
| Source: | Fullerenes, Nanotubes & Carbon Nanostructures. 2026, Vol. 34 Issue 6, p656-661. 6p. |
| Subjects: | Single walled carbon nanotubes, Doping agents (Chemistry), Coating processes, Electric conductivity, Chemical stability, Thermoelectric materials |
| Abstract: | In this study, we developed a simple process for fabricating free-standing single-walled carbon nanotube (SWCNT) films without centrifugation, using only ultrasonic treatment in o-dichlorobenzene and vacuum-filtration. The electrical and thermoelectric properties of the resulting SWCNT films were evaluated. Chemical doping with nitrosonium salts (NOPF6, NOBF4, and NOSbF6) significantly enhanced the electrical conductivity, achieving an improvement of up to approximately three-fold. X-ray photoelectron spectroscopy confirmed that doping induced a charge-transfer-type p-doped state in the materials. Although the Seebeck coefficient decreased upon doping, resulting in a reduced power factor, this behavior can be understood as a typical tradeoff caused by the increased carrier density of the doped samples. Furthermore, the chemically doped SWCNT films exhibited excellent durability, with minimal changes in their electrical properties even after six months of storage in nitrogen. These findings demonstrate that a simple film fabrication method combined with chemical doping can yield highly conductive and long-term stable SWCNT films, providing valuable insights into the design of conductive materials based on SWCNTs. [ABSTRACT FROM AUTHOR] |
| Copyright of Fullerenes, Nanotubes & Carbon Nanostructures is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 193389422 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Simple fabrication of single-walled carbon nanotube films and electrical property control via nitrosonium salt doping. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Imae%2C+Ichiro%22">Imae, Ichiro</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> imae@hiroshima-u.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Morimoto%2C+Miki%22">Morimoto, Miki</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Imato%2C+Keiichi%22">Imato, Keiichi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ooyama%2C+Yousuke%22">Ooyama, Yousuke</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Fullerenes%2C+Nanotubes+%26+Carbon+Nanostructures%22">Fullerenes, Nanotubes & Carbon Nanostructures</searchLink>. 2026, Vol. 34 Issue 6, p656-661. 6p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Single+walled+carbon+nanotubes%22">Single walled carbon nanotubes</searchLink><br /><searchLink fieldCode="DE" term="%22Doping+agents+%28Chemistry%29%22">Doping agents (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Coating+processes%22">Coating processes</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+conductivity%22">Electric conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+stability%22">Chemical stability</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoelectric+materials%22">Thermoelectric materials</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In this study, we developed a simple process for fabricating free-standing single-walled carbon nanotube (SWCNT) films without centrifugation, using only ultrasonic treatment in o-dichlorobenzene and vacuum-filtration. The electrical and thermoelectric properties of the resulting SWCNT films were evaluated. Chemical doping with nitrosonium salts (NOPF6, NOBF4, and NOSbF6) significantly enhanced the electrical conductivity, achieving an improvement of up to approximately three-fold. X-ray photoelectron spectroscopy confirmed that doping induced a charge-transfer-type p-doped state in the materials. Although the Seebeck coefficient decreased upon doping, resulting in a reduced power factor, this behavior can be understood as a typical tradeoff caused by the increased carrier density of the doped samples. Furthermore, the chemically doped SWCNT films exhibited excellent durability, with minimal changes in their electrical properties even after six months of storage in nitrogen. These findings demonstrate that a simple film fabrication method combined with chemical doping can yield highly conductive and long-term stable SWCNT films, providing valuable insights into the design of conductive materials based on SWCNTs. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Fullerenes, Nanotubes & Carbon Nanostructures is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/1536383X.2026.2632257 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: 656 Subjects: – SubjectFull: Single walled carbon nanotubes Type: general – SubjectFull: Doping agents (Chemistry) Type: general – SubjectFull: Coating processes Type: general – SubjectFull: Electric conductivity Type: general – SubjectFull: Chemical stability Type: general – SubjectFull: Thermoelectric materials Type: general Titles: – TitleFull: Simple fabrication of single-walled carbon nanotube films and electrical property control via nitrosonium salt doping. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Imae, Ichiro – PersonEntity: Name: NameFull: Morimoto, Miki – PersonEntity: Name: NameFull: Imato, Keiichi – PersonEntity: Name: NameFull: Ooyama, Yousuke IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: 2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 1536383X Numbering: – Type: volume Value: 34 – Type: issue Value: 6 Titles: – TitleFull: Fullerenes, Nanotubes & Carbon Nanostructures Type: main |
| ResultId | 1 |
