Measurement of the thermal conductivity of carbon nanowalls by the 3$\omega$ method

Carbon nanowall films with different thicknesses have been obtained by chemical deposition from a gas phase in a dc discharge. The thermal conductivity of the resulting structures has been measured for the first time using the 3$\omega$ method in the temperature range of 280–310 K. It has been shown that the thermal conductivity of walls depends on their thickness. The thermal conductivity of 1-$\mu$m carbon nanowalls is 6.9 W m$^{-1}$ K$^{-1}$. The results obtained in this work are necessary to design electro-optical devices based on carbon nanowalls.