Patent ID: 8459866

Claim:
A method for measuring a thermal conductivity of a one-dimensional material, the method comprising: providing the one-dimensional material whose characteristic band frequency value of Raman-spectra varies linearly with its temperature and a thermal conductivity measurement apparatus; wherein the thermal conductivity measurement apparatus comprises: a substrate and four electrodes comprising first, second, third and fourth electrodes spaced apart from each other, a middle part of the one-dimensional material located between the second and third electrodes and being suspended to act as a suspended part; 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: ω = P ⁢ ⁢ Δ ⁢ ⁢ L S ⁢ ⁢ Δ ⁢ ⁢ T