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| Pàgina inicial > Articles > Articles publicats > Enhanced Thermal Conductivity of Free-Standing Double-Walled Carbon Nanotube Networks |
(Institut Català de Nanociència i Nanotecnologia) (Institut Català de Nanociència i Nanotecnologia) (imec vzw) (Institut Català de Nanociència i Nanotecnologia) (Institut Català de Nanociència i Nanotecnologia) (Institut Català de Nanociència i Nanotecnologia) (Institut Català de Nanociència i Nanotecnologia)
| Data: | 2023 |
| Resum: | Nanomaterials are driving advances in technology due to their oftentimes superior properties over bulk materials. In particular, their thermal properties become increasingly important as efficient heat dissipation is required to realize high-performance electronic devices, reduce energy consumption, and prevent thermal damage. One application where nanomaterials can play a crucial role is extreme ultraviolet (EUV) lithography, where pellicles that protect the photomask from particle contamination have to be transparent to EUV light, mechanically strong, and thermally conductive in order to withstand the heat associated with high-power EUV radiation. Free-standing carbon nanotube (CNT) films have emerged as candidates due to their high EUV transparency and ability to withstand heat. However, the thermal transport properties of these films are not well understood beyond bulk emissivity measurements. Here, we measure the thermal conductivity of free-standing CNT films using all-optical Raman thermometry at temperatures between 300 and 700 K. We find thermal conductivities up to 50 W m -1 K -1 for films composed of double-walled CNTs, which rises to 257 W m -1 K -1 when considering the CNT network alone. These values are remarkably high for randomly oriented CNT networks, roughly seven times that of single-walled CNT films. The enhanced thermal conduction is due to the additional wall, which likely gives rise to additional heat-carrying phonon modes and provides a certain resilience to defects. Our results demonstrate that free-standing double-walled CNT films efficiently dissipate heat, enhancing our understanding of these promising films and how they are suited to applications in EUV lithography. |
| Ajuts: | European Commission 101069363 Agencia Estatal de Investigación RYC-2017-22330 Agencia Estatal de Investigación PID2019-111673GB-I00 Agencia Estatal de Investigación PGC2018-101743-B-I00 European Commission 101099125 European Commission 804349 Ministerio de Economía y Competitividad SEV-2017-0706 |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.  |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | Carbon nanotubes ; Thermal conductivity ; Raman thermometry ; Lithography ; Pellicle ; Extreme ultraviolet |
| Publicat a: | ACS applied materials & interfaces, Vol. 15, Num. 44 (October 2023) , p. 51876-51884, ISSN 1944-8252 |
