热导率
声子
材料科学
碳纳米管
电导率
碳纤维
热的
散射
极化(电化学)
非平衡态热力学
化学物理
纳米技术
复合材料
凝聚态物理
热力学
光学
化学
物理化学
物理
复合数
作者
Junhua Zhao,Jianyang Wu,Jin-Wu Jiang,Lixin Lu,Zhiliang Zhang,Timon Rabczuk
摘要
The extreme reduction of the thermal conductivity by defects and folds in carbon nanocoils (CNCs) are first demonstrated using nonequilibrium molecular dynamics simulations. The thermal conductivity for two different defect types with five different folds in the CNCs is extensively studied and the maximum reduction can be up to 70% at both room temperature and 600 K by comparison of the corresponding straight single-walled carbon nanotubes. We reveal that the phonon scattering by coupled defects and folds can govern the reduction of the thermal conductivity by calculating phonon polarization vectors.
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