Method for measuring thermal conductivity of one-dimensional material

摘要

A method for measuring a thermal conductivity of a one-dimensional material is provided. The method includes the following steps: providing the one-dimensional material whose characteristic band frequency value of Raman-spectra varies linearly with its temperature and a thermal conductivity measurement apparatus; obtaining a length ΔL of the suspended part of the one-dimensional material and a cross sectional area S of the one-dimensional material; connecting the four electrodes with the one-dimensional material; heating the one-dimensional material with a current and the one-dimensional material reaches heat balance; acquiring a power P flowing through the suspended part of the one-dimensional material along an axial direction of the one dimensional material; obtaining a temperature difference ΔT between a middle point and one of the two end points of the suspended part of the one-dimensional material; and calculating the thermal conductivity ω of the one-dimensional material in accordance with:; $$ \omega =\frac{P\Delta L}{S\Delta T}.$$