Экспериментальное исследование коэффициента теплопроводности в тонких пленках на основе одностенных углеродных нанотрубок

Thin films based on single walled carbon nanotubes with a thickness of 11 ± 3 to 157 ± 18 nm were formed using vacuum filtration. The thermal conductivity coefficient in thin films was studied depending on the thickness and temperature up to 450 K using the 3ω method. It was found that, in the region of 49 nm, the supplied heat from the gold strip began to efficiently propagate into the plane of the thin film. The thermal conductivity coefficient for thin films with a thickness of 49 ± 8 nm was measured according to the 3ω method for bulk samples. It was found that the thermal conductivity in thin films based on single walled carbon nanotubes strongly depends on the thickness and temperature. The thermal conductivity increased sharply (~ 60 times) with increasing thickness from 11 ± 3 to 65 ± 4 nm. In addition, it was revealed that the thermal conductivity coefficient for 157 ± 18 nm thin film rapidly decreased from 211 ± 11 to 27.5 ± 1.4 W · m-1 · K-1 for 300 and 450 K, respectively.