Abstract

Multiwall carbon nanotubes (MWCNTs) with different initial diameters have been irradiated with accelerated He\({}^{+}\) ions in the fluence range from \(2.5\times 10^{15}\) to \(3\times 10^{16}\) ion/cm\({}^{2}\). Raman scattering showed that the number of defects and amorphicity of MWCNTs rapidly increase with increasing fluence. The change in the mean diameter of MWCNTs depending on the irradiation fluence is shown. The change in the nature of this dependence for different initial diameters of the nanotubes is discussed. Sputtering of nanotubes has been simulated. It is shown that the value of the sputtering yield is in good agreement with the experimentally measured values of the mean diameter of the nanotubes.

中文翻译：

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离子辐照通量对不同直径多壁碳纳米管结构的影响

摘要

具有不同初始直径的多壁碳纳米管 (MWCNT) 已被加速的 He \({}^{+}\)离子照射，通量范围从\(2.5\times 10^{15}\)到\(3\times 10^{16}\)离子/厘米\({}^{2}\)。拉曼散射表明，随着能量密度的增加，MWCNTs 的缺陷数量和非晶性迅速增加。显示了 MWCNT 平均直径的变化取决于辐照通量。讨论了对不同初始纳米管直径的这种依赖性的性质变化。已经模拟了纳米管的溅射。结果表明，溅射产额值与纳米管平均直径的实验测量值非常吻合。