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| Título: | Thermal conductivity of MoS2 polycrystalline nanomembranes |
Autor: | Sledzinska, Marianna CSIC ORCID; Graczykowski, B. CSIC ORCID; Sachat, Alexandros el CSIC ORCID; Reparaz, J. S. CSIC ORCID; Alzina, Francesc CSIC ORCID; Colombo, Luciano CSIC ORCID; Roche, Stephan CSIC ORCID; Sotomayor Torres, C. M. CSIC ORCID | Fecha de publicación: | 2016 | Editor: | Institute of Physics Publishing | Citación: | 2D Materials 3(3): 035016 (2016) | Resumen: | Heat conduction in 2D materials can be effectively engineered by means of controlling nanoscale grain structure. Afavorable thermal performance makes these structures excellent candidates for integrated heat management units. Here we show combined experimental and theoretical studies for MoS nanosheets in a nanoscale grain-size limit.Wereport thermal conductivity measurements on 5 nm thick polycrystalline MoS by means of 2-laser Raman thermometry. The free-standing, drum-like MoS nanomembranes were fabricated using a novel polymer- and residue-free, wet transfer, in which we took advantage of the difference in the surface energies between MoS and the growth substrate to transfer the CVD-grown nanosheets. The measurements revealed a strong reduction in the in-plane thermal conductivity down to about 0.73 ± 0.25 W m K. The results are discussed theoretically using finite elements method simulations for a polycrystalline film, and a scaling trend of the thermally conductivity with grain size is proposed. | Descripción: | arXiv:1604.04865.-- et al. | Versión del editor: | https://doi.org/10.1088/2053-1583/3/3/035016 | URI: | http://hdl.handle.net/10261/160013 | DOI: | 10.1088/2053-1583/3/3/035016 | Identificadores: | doi: 10.1088/2053-1583/3/3/035016 e-issn: 2053-1583 |
| Aparece en las colecciones: | (CIN2) Artículos |
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