材料科学
碳纳米管
透射电子显微镜
碳纤维
辐照
通量
纳米技术
纳米材料
纳米结构
结构稳定性
纳米-
化学工程
化学物理
复合材料
化学
复合数
物理
工程类
核物理学
结构工程
作者
Zhaoyun Lin,Gang Shao,Wen Liu,Yiguang Wang,Hailong Wang,Hailiang Wang,Bingbing Fan,Hongxia Lu,Hongliang Xu,Rui Zhang
出处
期刊:Carbon
[Elsevier]
日期:2022-06-01
卷期号:192: 356-365
被引量:16
标识
DOI:10.1016/j.carbon.2022.02.079
摘要
The dynamic transformations and damage behavior of free-standing multi-wall carbon nanotubes (MWCNTs), carbon nano-onions (CNOs), as well as nanodiamonds (NDs) are systematically studied by carrying out in-situ transmission electron microscope (TEM) measurements. Three key factors, including sp2-sp3 hybrid, inherent defects and morphology, are employed in order to deeply explore the disordering or the graphitization process in this work. On top of that, by applying fluence calculations, interplanar spacing measurements and inverse fast-Fourier-transformations, the structural evolutions of the carbon nanomaterials are precisely described. Interestingly, under the enforcement of high dose (up to 26.98 × 1024 e/cm2) and current density (1.66 × 103 and 3.79 × 103 A/cm2), we discovered that the NDs and CNOs with ∼10 nm average diameter presented better structural stability than the MWCNTs. The structural transition in NDs undergoes 4 stages, whereas NDs turn into the defective CNOs finally. By comparing the defective and the perfect CNOs and CNTs, the existence of inherent defects in the material leads to the degeneration of the stability under irradiation of 5.59 × 1024 e/cm2. In addition, the direction of the defect migration can be changed by the empty internal space, which is ultimately imposed by irradiation-induced pressure in the carbon nanostructures.
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