Thermal conductivity of single-walled carbon nanotubes
نویسندگان
چکیده
We have measured the temperature-dependent thermal conductivity k(T) of crystalline ropes of singlewalled carbon nanotubes from 350 K to 8 K. k(T) decreases smoothly with decreasing temperature, and displays linear temperature dependence below 30 K. Comparison with electrical conductivity experiments indicates that the room-temperature thermal conductivity of a single nanotube may be comparable to that of diamond or in-plane graphite, while the ratio of thermal to electrical conductance for a given sample indicates that the thermal conductivity is dominated by phonons at all temperatures. Below 30 K, the linear temperature dependence and estimated magnitude of k(T) imply an energy-independent phonon mean free path of ;0.5– 1.5 mm. @S0163-1829~99!50404-9#
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