Experimental Investigations on Thermal Transport Properties of Nanoscale-Graphite-Film

作     者：ZHOU Jing SHI Changrui ZHANG Zhongyin FAN Xuanhui LING Zheng ZHU Jie TANG Dawei ZHOU Jing;SHI Changrui;ZHANG Zhongyin;FAN Xuanhui;LING Zheng;ZHU Jie;TANG Dawei

作者机构：School of Energy and Power EngineeringKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of EducationDalian University of TechnologyDalian 116024China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2022年第31卷第4期

页      面：1008-1015页

核心收录：

学科分类：081702[工学-化学工艺] 080701[工学-工程热物理] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：from National Natural Science Foundation of China(51976025,51720105007) the Fundamental Research Funds for the Central Universities(DUT20RC(5)023)。 

主　　题：nanoscale graphite thin film thermal conductivity interface thermal conductance 

摘      要：Accurately and directly characterizing the thermal properties of graphene and thin-graphite films(GFs)is of fundamental importance for understanding the heat transport mechanism and of practical interest in possible applications of thermal management.However,due to the lack of experiment data,the mechanism of the thickness dependence of GFs thermal properties has not been fully understood yet.In this study,a 90-nm-thick GF is characterized by the time-domain thermoreflectance method,and the obtained GFs in-plane thermal conductivity and interfacial thermal conductance between GFs and gold are(1354±297)W/(m·K)and(38±6)MW/(m^(2)·K),respectively.Two theoretical models are also applied for comparison and discussion,and we conclude that the influence from the surface perturbation by supporting materials on the phonon transport of graphite nano-films will beyond the near surface layers to the more inner ones.This work not only provides a better understanding of the fundamental mechanisms of the thermal transport size effect in GFs,but also facilitates the possible applications of GFs as heat spreaders in the future.