title: Characterization of Thermal Transport in One-dimensional Solid Materials.
abstract: The TET (transient electro-thermal) technique is an effective approach developed to measure the thermal diffusivity of solid materials, including conductive, semi-conductive or nonconductive one-dimensional structures. This technique broadens the measurement scope of materials (conductive and nonconductive) and improves the accuracy and stability. If the sample (especially biomaterials, such as human head hair, spider silk, and silkworm silk) is not conductive, it will be coated with a gold layer to make it electronically conductive. The effect of parasitic conduction and radiative losses on the thermal diffusivity can be subtracted during data processing. Then the real thermal conductivity can be calculated with the given value of volume-based specific heat (ρcp), which can be obtained from calibration, noncontact photo-thermal technique or measuring the density and specific heat separately. In this work, human head hair samples are used to show how to set up the experiment, process the experimental data, and subtract the effect of parasitic conduction and radiative losses.
authors: Department of Mechanical Engineering, Iowa State University.
authors: Guoqing
authors: G
authors: Liu
authors: Huan
authors: H
authors: Lin
authors: Xiaoduan
authors: X
authors: Tang
authors: Kevin
authors: K
authors: Bergler
authors: Xinwei
authors: X
authors: Wang
mesh_terms: D006197:Hair / Q000737:chemistry*; D006358:Hot Temperature; D006801:Humans; D013814:Thermal Conductivity