Thermal conductivity of individual carbon nanofibers |
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| Affiliation: | 1. Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea;2. Applied Optics & Energy Research Group, Korea Institute of Industrial Technology, 1110-9 Oryong-dong, Buk-gu, Gwangju 500-480, Republic of Korea;1. Eskisehir Osmangazi University, Physics Department, 26480, Turkey;2. Bayburt University, Primary Science Education Department, 69000, Turkey;1. Institut Européen des membranes, UMR 5635 ENSCM UM2 CNRS, Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier, France;2. Faculty of Science, Beirut Arab University, P.O. Box 11-5020 Riad El Solh, Beirut 1107 2809, Lebanon |
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| Abstract: | In the present paper, we present results of thermal conductivity measurements in commercially-available, chemical vapor deposition grown, heat-treated and non-heat-treated individual carbon nanofibers (CNFs). The thermal conductivity measurements are made using the T-type probe experimental configuration using a Wollaston wire probe inside a high resolution scanning electron microscope. The results show a significant increase in the thermal conductivity of CNFs that are annealed at 2800 °C for 20 h when compared with the non-heat-treated CNF samples. When adjusted for thermal contact resistance, the highest measured thermal conductivity is 449 ± 39 W/m-K. The average thermal conductivity of the heat-treated samples is 163 W/m-K, while the average thermal conductivity of the non-heat-treated samples is 4.6 W/m-K. The results demonstrate the importance of the quality of the CNFs, in particular their heat treatment (high temperature annealing), in controlling their thermal conductivity for thermal management applications. |
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