Tuning the Kapitza resistance in pillared-graphene nanostructures
The pillared-graphene architecture is a conceivable way of conjoining graphene nanoribbons and carbon nanotubes (CNTs) in nanoelectronics. Especially promising is its capability to dissipate thermal energy in thermal management applications. However, the thermal boundary resistance (Kapitza resistan...
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| Format: | Journal Article |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/95020 http://hdl.handle.net/10220/9309 |
| _version_ | 1826113112357470208 |
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| author | Loh, G. C. Teo, Edwin Hang Tong Tay, Beng Kang |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Loh, G. C. Teo, Edwin Hang Tong Tay, Beng Kang |
| author_sort | Loh, G. C. |
| collection | NTU |
| description | The pillared-graphene architecture is a conceivable way of conjoining graphene nanoribbons and carbon nanotubes (CNTs) in nanoelectronics. Especially promising is its capability to dissipate thermal energy in thermal management applications. However, the thermal boundary resistance (Kapitza resistance) at the graphene nanoribbon-CNT interface is a phonon barricade and a bottleneck for efficacious heat extraction. Parallel to strain studies on thermal conductance, this work is a first report on the effects of mechanical strain on the interfacial phonon dynamics in the pillared-graphene nanostructure (PGN). Molecular dynamics simulations are employed to derive the changes in phononics as axial, torsional, and compound strains of various degrees are applied on the PGN. The pillar lattice structure behaves dissimilarly to the different types of strains. In-plane transverse optical mode softening as induced by torsional strain is more effective than LO softening (triggered by tension) in minimizing the thermal boundary resistance. Essentially, it is shown that there is a strong relationship between strained PGN pillar lattice structure, interfacial phononics, and thermal boundary resistance. |
| first_indexed | 2024-10-01T03:17:51Z |
| format | Journal Article |
| id | ntu-10356/95020 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:17:51Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/950202020-03-07T14:02:44Z Tuning the Kapitza resistance in pillared-graphene nanostructures Loh, G. C. Teo, Edwin Hang Tong Tay, Beng Kang School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics The pillared-graphene architecture is a conceivable way of conjoining graphene nanoribbons and carbon nanotubes (CNTs) in nanoelectronics. Especially promising is its capability to dissipate thermal energy in thermal management applications. However, the thermal boundary resistance (Kapitza resistance) at the graphene nanoribbon-CNT interface is a phonon barricade and a bottleneck for efficacious heat extraction. Parallel to strain studies on thermal conductance, this work is a first report on the effects of mechanical strain on the interfacial phonon dynamics in the pillared-graphene nanostructure (PGN). Molecular dynamics simulations are employed to derive the changes in phononics as axial, torsional, and compound strains of various degrees are applied on the PGN. The pillar lattice structure behaves dissimilarly to the different types of strains. In-plane transverse optical mode softening as induced by torsional strain is more effective than LO softening (triggered by tension) in minimizing the thermal boundary resistance. Essentially, it is shown that there is a strong relationship between strained PGN pillar lattice structure, interfacial phononics, and thermal boundary resistance. Published version 2013-02-28T07:29:08Z 2019-12-06T19:06:39Z 2013-02-28T07:29:08Z 2019-12-06T19:06:39Z 2012 2012 Journal Article Loh, G. C., Teo, E. H. T., & Tay, B. K. (2012). Tuning the Kapitza resistance in pillared-graphene nanostructures. Journal of applied physics, 111(1), 013515. 0021-8979 https://hdl.handle.net/10356/95020 http://hdl.handle.net/10220/9309 10.1063/1.3676200 en Journal of applied physics © 2012 American Institute of Physics. This paper was published in Journal of Applied Physics and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.3676200]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics Loh, G. C. Teo, Edwin Hang Tong Tay, Beng Kang Tuning the Kapitza resistance in pillared-graphene nanostructures |
| title | Tuning the Kapitza resistance in pillared-graphene nanostructures |
| title_full | Tuning the Kapitza resistance in pillared-graphene nanostructures |
| title_fullStr | Tuning the Kapitza resistance in pillared-graphene nanostructures |
| title_full_unstemmed | Tuning the Kapitza resistance in pillared-graphene nanostructures |
| title_short | Tuning the Kapitza resistance in pillared-graphene nanostructures |
| title_sort | tuning the kapitza resistance in pillared graphene nanostructures |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics |
| url | https://hdl.handle.net/10356/95020 http://hdl.handle.net/10220/9309 |
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