Crossover from ballistic to diffusive thermal transport in suspended graphene membranes
We report heat transport measurements on suspended single-layer graphene disks with radius of 150-1600 nm using a high-vacuum scanning thermal microscope. The results of this study revealed a radius-dependent thermal contact resistance between tip and graphene, with values between 1.15 and 1.52 × 10...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:220652 |
| Acceso en línea: | https://ddd.uab.cat/record/220652 https://dx.doi.org/urn:doi:10.1088/2053-1583/ab097d |
| Access Level: | acceso abierto |
| Palabra clave: | Graphene Nanoscale thermal transport Nanoscale thermal imaging Ballistic phonon transport Scanning thermal microscopy |
| Sumario: | We report heat transport measurements on suspended single-layer graphene disks with radius of 150-1600 nm using a high-vacuum scanning thermal microscope. The results of this study revealed a radius-dependent thermal contact resistance between tip and graphene, with values between 1.15 and 1.52 × 10 KW. The observed scaling of thermal resistance with radius is interpreted in terms of ballistic phonon transport in suspended graphene discs with radius smaller than 775 nm. In larger suspended graphene discs (radius. |
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