A three-probe method for accurate nanoscale thermal transport measurements

Po Yen Huang, Tzu Kan Hsiao, Jiun Hung Yi, Bo Yi Chen, Yu Cheng Chiu, I. Ling Chang, Tien Kan Chung, Ming-Chang Lu*, Chih Wei Chang*

*此作品的通信作者

研究成果: Article同行評審

摘要

Measurements of transport phenomena are constantly plagued by contact resistance, prohibiting the sample's intrinsic electrical or thermal conductivity from being accurately determined. This predicament is particularly severe in thermal transport measurements due to the inability to meet similar impedance requirements for a four-probe method used in electrical resistance measurements. Here, we invent a three-probe measurement method that makes an accurate determination of thermal conductivity possible for nanomaterials. Incorporating electron beam heating provided by a scanning electron microscope (SEM) on a diffusive thermal conductor not only quantifies the thermal contact resistance, which may introduce an error of more than 270% to a sample's thermal conductivity, but also eliminates several device uncertainties that may contribute an additional 17% error in a measurement. The method also enables local temperature measurements, revealing nanoscale structural variations unfound by SEM. The high accuracy of the technique would make standardization of nanoscale thermal transport measurement possible.

原文English
文章編號182201
期刊Applied Physics Letters
124
發行號18
DOIs
出版狀態Published - 29 4月 2024

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