Optical microspectroscopy study on enriched (11,10) SWCNTs encapsulating C60 fullerene molecules
Optical microspectroscopy study on enriched (11,10) SWCNTs encapsulating C60 fullerene molecules
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DOI：
10.1016/j.carbon.2016.06.026
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发表时间：
2016-10
期刊：
影响因子：
10.9
通讯作者：
B. Anis;K. Yanagi;C. Kuntscher
中科院分区：
文献类型：
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作者：
B. Anis;K. Yanagi;C. Kuntscher
利用光学显微光谱技术研究了C_（60）富勒烯分子与单手性（11，10）单壁碳纳米管（SWCNTs）之间的相互作用.将（11，10）SWCNT和（11，10）豌豆荚的结果与多手性SWCNT和豌豆荚进行比较。与多手性SWCNT相比，在（11，10）SWCNT的情况下吸收带的精细结构的缺乏证明了（11，10）SWCNT为研究封装的C60分子与纳米管之间的相互作用提供了良好限定的环境。与（11，10）单壁碳纳米管相比，（11，10）豆荚状碳纳米管的吸收带发生了较大的红移，光谱权重降低。这些发现表明，用C60分子填充（11，10）SWCNTs增加了内部介电常数，并诱导SWCNTs和被封装的C60分子之间的电荷转移。为了测试内部介电常数和电荷转移对（11，10）单壁碳纳米管光学性质的影响，采用激光辐照法将（11，10）豆荚转化为双壁碳纳米管（DWCNTs）。包封的富勒烯分子向内壁的转化降低了环境介电常数以及从外管的电荷转移。
The interaction between C60fullerene molecules and single-chirality (11,10) single-walled carbon nanotubes (SWCNTs) is demonstrated by probing the optical transitions in (11,10) peapods by optical microspectroscopy. The results of the (11,10) SWCNTs and (11,10) peapods are compared to multi-chirality SWCNTs and peapods. The absence of the fine structure of the absorption bands in the case of (11,10) SWCNTs in comparison to multi-chirality SWCNTs demonstrates that the (11,10) SWCNTs provide a well-defined environment for studying the interaction between the encapsulated C60molecules and the nanotubes. As compared to (11,10) SWCNTs, the absorption bands in (11,10) peapods show a large red shift and a reduction of the spectral weight. These findings suggest that the filling of the (11,10) SWCNTs with C60molecules increases the internal dielectric constant and induces a charge transfer between the SWCNTs and the encapsulated C60molecules. For testing the effect of the internal dielectric constant and charge transfer on the optical properties of the (11,10) SWCNTs, the (11,10) peapods were transformed to double-walled carbon nanotubes (DWCNTs) using the laser irradiation method. The transformation of the encapsulated fullerene molecules into inner wall reduces the environmental dielectric constant as well as the charge transfer from the outer tube.