Enhancing the Thermal Conductivity of Amorphous Carbon with Nanowires and Nanotubes.
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| Title: | Enhancing the Thermal Conductivity of Amorphous Carbon with Nanowires and Nanotubes. |
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| Authors: | Mora-Barzaga, Geraudys1,2 (AUTHOR) gmorabarzaga92@gmail.com, Valencia, Felipe J.3,4 (AUTHOR), Carrasco, Matías I.5 (AUTHOR), González, Rafael I.4,6 (AUTHOR), Parlanti, Martín G.7 (AUTHOR), Miranda, Enrique N.1,7 (AUTHOR), Bringa, Eduardo M.1,2,6 (AUTHOR) gmorabarzaga92@gmail.com |
| Source: | Nanomaterials (2079-4991). Aug2022, Vol. 12 Issue 16, p2835-2835. 20p. |
| Subjects: | Carbon nanowires, Thermal conductivity, Amorphous carbon, Thermal electrons, Elastic modulus, Nanowires, Carbon nanotubes |
| Abstract: | The thermal conductivity of nanostructures can be obtained using atomistic classical Molecular Dynamics (MD) simulations, particularly for semiconductors where there is no significant contribution from electrons to thermal conduction. In this work, we obtain and analyze the thermal conductivity of amorphous carbon (aC) nanowires (NW) with a 2 nm radius and aC nanotubes (NT) with 0.5, 1 and 1.3 nm internal radii and a 2 nm external radius. The behavior of thermal conductivity with internal radii, temperature and density (related to different levels of s p 3 hybridization), is compared with experimental results from the literature. Reasonable agreement is found between our modeling results and the experiments for aC films. In addition, in our simulations, the bulk conductivity is lower than the NW conductivity, which in turn is lower than the NT conductivity. NTs thermal conductivity can be tailored as a function of the wall thickness, which surprisingly increases when the wall thickness decreases. While the vibrational density of states (VDOS) is similar for bulk, NW and NT, the elastic modulus is sensitive to the geometrical parameters, which can explain the enhanced thermal conductivity observed for the simulated nanostructures. [ABSTRACT FROM AUTHOR] |
| Copyright of Nanomaterials (2079-4991) is the property of MDPI 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.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 158912640 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Enhancing the Thermal Conductivity of Amorphous Carbon with Nanowires and Nanotubes. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Mora-Barzaga%2C+Geraudys%22">Mora-Barzaga, Geraudys</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> gmorabarzaga92@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Valencia%2C+Felipe+J%2E%22">Valencia, Felipe J.</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Carrasco%2C+Matías+I%2E%22">Carrasco, Matías I.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22González%2C+Rafael+I%2E%22">González, Rafael I.</searchLink><relatesTo>4,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Parlanti%2C+Martín+G%2E%22">Parlanti, Martín G.</searchLink><relatesTo>7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Miranda%2C+Enrique+N%2E%22">Miranda, Enrique N.</searchLink><relatesTo>1,7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bringa%2C+Eduardo+M%2E%22">Bringa, Eduardo M.</searchLink><relatesTo>1,2,6</relatesTo> (AUTHOR)<i> gmorabarzaga92@gmail.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Aug2022, Vol. 12 Issue 16, p2835-2835. 20p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Carbon+nanowires%22">Carbon nanowires</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+conductivity%22">Thermal conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Amorphous+carbon%22">Amorphous carbon</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+electrons%22">Thermal electrons</searchLink><br /><searchLink fieldCode="DE" term="%22Elastic+modulus%22">Elastic modulus</searchLink><br /><searchLink fieldCode="DE" term="%22Nanowires%22">Nanowires</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+nanotubes%22">Carbon nanotubes</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The thermal conductivity of nanostructures can be obtained using atomistic classical Molecular Dynamics (MD) simulations, particularly for semiconductors where there is no significant contribution from electrons to thermal conduction. In this work, we obtain and analyze the thermal conductivity of amorphous carbon (aC) nanowires (NW) with a 2 nm radius and aC nanotubes (NT) with 0.5, 1 and 1.3 nm internal radii and a 2 nm external radius. The behavior of thermal conductivity with internal radii, temperature and density (related to different levels of s p 3 hybridization), is compared with experimental results from the literature. Reasonable agreement is found between our modeling results and the experiments for aC films. In addition, in our simulations, the bulk conductivity is lower than the NW conductivity, which in turn is lower than the NT conductivity. NTs thermal conductivity can be tailored as a function of the wall thickness, which surprisingly increases when the wall thickness decreases. While the vibrational density of states (VDOS) is similar for bulk, NW and NT, the elastic modulus is sensitive to the geometrical parameters, which can explain the enhanced thermal conductivity observed for the simulated nanostructures. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI 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: 10.3390/nano12162835 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 20 StartPage: 2835 Subjects: – SubjectFull: Carbon nanowires Type: general – SubjectFull: Thermal conductivity Type: general – SubjectFull: Amorphous carbon Type: general – SubjectFull: Thermal electrons Type: general – SubjectFull: Elastic modulus Type: general – SubjectFull: Nanowires Type: general – SubjectFull: Carbon nanotubes Type: general Titles: – TitleFull: Enhancing the Thermal Conductivity of Amorphous Carbon with Nanowires and Nanotubes. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Mora-Barzaga, Geraudys – PersonEntity: Name: NameFull: Valencia, Felipe J. – PersonEntity: Name: NameFull: Carrasco, Matías I. – PersonEntity: Name: NameFull: González, Rafael I. – PersonEntity: Name: NameFull: Parlanti, Martín G. – PersonEntity: Name: NameFull: Miranda, Enrique N. – PersonEntity: Name: NameFull: Bringa, Eduardo M. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 08 Text: Aug2022 Type: published Y: 2022 Identifiers: – Type: issn-print Value: 20794991 Numbering: – Type: volume Value: 12 – Type: issue Value: 16 Titles: – TitleFull: Nanomaterials (2079-4991) Type: main |
| ResultId | 1 |
