材料科学
碳纳米管
复合数
透射电子显微镜
无定形碳
弯曲
无定形固体
扫描电子显微镜
电子
复合材料
负热膨胀
碳纤维
纳米技术
光学
热膨胀
化学
结晶学
物理
量子力学
作者
Xiannian Chi,Lei Wang,Jian Zhang,Jean Pierre Nshimiyimana,Xiao Hu,Pei Wu,Siyu Liu,Jia Liu,Weiguo Chu,Qian Liu,Lianfeng Sun
标识
DOI:10.1021/acs.jpcc.8b07372
摘要
When a composite nanocable of single-walled carbon nanotubes (SWNTs) and amorphous carbon is fixed at one end and the other end is free, the free end is observed to be bent with a scanning electron microscope and a transmission electron microscope. The bending of the free end of the nanocable is found to be toward the reverse direction of incident electrons. Also, the bending of the composite nanocable depends on the energy and exposure time of the incident electron beam. The mechanism of these observations is attributed to inhomogeneous temperature rise by absorption of incident electrons and a negative thermal expansion (NTE) of the composite nanocable along the axial direction. The NTE property demonstrates the potential for using electron beam irradiation to investigate and manipulate SWNTs in nanodevices and making a zero-expansion composite material.
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