Experimental Study on Thermal Property of Nanowires

纳米线热性能的实验研究

• 批准号: 20360099
• 负责人: TAKAHASHI Koji
• 金额: $ 12.56万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20360099/
• 关键词: カーボンナノチューブ; 熱伝導率; フォノン; 低次元材料; MEMS; ナノ熱センサ; 熱整流; 界面熱抵抗; 弾道的熱伝導; ナノセンサ; カーボンナノファイーバー; その場計測

Thermal transport of nanowires represented by carbon nanotube (CNT) depends on their atomic structure and size. In this study, thermal conductivity of nanowire was measured individually and discussed in comparison with its atomistic structure using HRTEM. Multiwalled CNTs, SiC nanowires and cup-stacked carbon nano fibers (CSCNFs) were treated by using tailor-made nano thermal sensors. CSCNFs showed ballistic phonon transport due to their structural similarity with one-dimensional (1D) harmonic chain. Molecular dynamics simulations were used to confirm this experiment and investigate the mechanism of heat transfer in this quasi-1D system. The thermal conductivity of SiC nanowire was found much lower than that of bulk material due to the phonon scattering on the outer surface. Quantitative measurement of thermal boundary resistance between carbon nanotube and solid surface was also successfully conducted for the first time. This study deepened our understanding of thermal transport of nano materials.

以碳纳米管（CNT）为代表的纳米线的热输运依赖于其原子结构和尺寸。在这项研究中，纳米线的热导率单独测量，并讨论了使用高分辨透射电子显微镜与其原子结构的比较。利用特制的纳米热传感器对多壁碳纳米管、碳化硅纳米线和杯状碳纳米纤维进行了处理。CSCNFs由于其与一维（1D）谐波链的结构相似性而表现出弹道声子输运。利用分子动力学模拟验证了实验结果，并研究了准一维系统的传热机理。由于外表面声子散射的影响，SiC纳米线的热导率远低于体材料。首次成功地对碳纳米管与固体表面之间的边界热阻进行了定量测量。该研究加深了我们对纳米材料热输运的理解。

项目成果

A GRAPHENE CHAIN ACTS AS A LONG-DISTANCE BALLISTIC HEAT CONDUCTOR

石墨烯链充当长距离弹道热导体

• 发表时间: 2011
• 期刊: Proc.International Heat Transfer Conf (IHTC14) August 8-13, 2010, Washington, DC, USA
• 作者: Koji Takahashi;Yohei Ito;Tatsuya Ikuta
• 通讯作者: Tatsuya Ikuta

Thermal conductivity of SiC nanowire formed by combustion synthesis

• 发表时间: 2008
• 期刊: High Temperatures-high Pressures
• 影响因子: 1.1
• 作者: Koji Takahashi;Yôhei Itô;T. Ikuta;T. Nishiyama;M. Fujii;Xing Zhang;A. Huczko

Measurement technique of thermal contact resistance of a carbon nanotube tip

碳纳米管尖端接触热阻测量技术

• 发表时间: 2010
• 作者: Jun Hirotani;Tatsuya Ikuta;Koji Takahashi
• 通讯作者: Koji Takahashi

CARBON NANOTUBE THERMAL PROBE USING PLATINUM NANOHOT-FILM

使用铂纳米热膜的碳纳米管热探针

• 发表时间: 2009
• 期刊: Proceedings of ASME 2009 2nd Micro/Nanoscale Heat & Mass Transfer International Conference, Dec. 18-22, 2009, Shanghai, China
• 作者: Koji Takahashi;Jun Hirotani;Satoshi Kai;Tatsuya Ikuta
• 通讯作者: Tatsuya Ikuta

Defective Carbon Nanotube for Use as a Thermal Rectifier, Japanese

用作热整流器的有缺陷的碳纳米管，日本

• 发表时间: 2010
• 期刊: J.Applied Physics 49
• 作者: K.Takahashi;M.Inoue;Y.Ito
• 通讯作者: Y.Ito