Optical Microspectroscopy Study of the Mechanical Stability of Empty and Filled Carbon Nanotubes under Hydrostatic Pressure
Optical Microspectroscopy Study of the Mechanical Stability of Empty and Filled Carbon Nanotubes under Hydrostatic Pressure
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DOI：
10.1021/jp506922s
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发表时间：
2014-11
影响因子：
3.7
通讯作者：
B. Anis;F. Börrnert;M. Rümmeli;and C. A. Kuntscher
中科院分区：
文献类型：
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作者：
B. Anis;F. Börrnert;M. Rümmeli;and C. A. Kuntscher
我们对填充C60和C70富勒烯分子（C60-和C70-豆荚）的单壁碳纳米管（SWCNTs）、由C60-和C70-豆荚衍生的双壁碳纳米管（DWCNTs/C60和DWCNTs/C70）以及填充碘的SWCNTs （I-SWCNTs）的机械稳定性进行了高压光学和红外光谱研究。采用高分辨率透射电子显微镜、拉曼光谱和光谱学对制备的样品进行表征。对于C60-和c70 -豆荚体，我们发现在临界压力Pc1≈6.5和7.0 GPa下，与空SWCNTs的Pc1≈3 GPa相比，光跃迁的压力诱导位移存在异常。异常向高压的转变表明了C60和C70填充对纳米管的稳定作用。对于平均直径相似的高填充豆荚，Pc1值与压力诱导变形的理论预测值吻合较好。与SWCNTs相比，压力诱导…
We present a high-pressure optical and infrared spectroscopy study on the mechanical stability of single-walled carbon nanotubes (SWCNTs) filled with C60 and C70 fullerene molecules (C60- and C70-peapods), double-walled carbon nanotubes (DWCNTs) derived from the C60- and C70-peapods (DWCNTs/C60 and DWCNTs/C70), and iodine-filled SWCNTs (I-SWCNTs). High-resolution transmission electron microscopy, Raman, and optical spectroscopy were used to characterize all prepared samples. For the C60- and C70-peapods, we find an anomaly in the pressure-induced shifts of the optical transitions at the critical pressures Pc1 ≈ 6.5 and 7.0 GPa, respectively, compared to Pc1 ≈ 3 GPa in the case of empty SWCNTs. The shift of the anomaly to higher pressure signals the stabilization of the nanotubes by the C60 and C70 filling. The value of Pc1 is in good agreement with theoretical predictions of the pressure-induced deformation for highly filled peapods with similar average diameter. In comparison to SWCNTs, the pressure-indu...