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采用气相扩散方法将C60分子填充到单壁碳纳米管(SWNTs)中，制备出高填充比率的豆荚形纳米材料C60@SWNT，又称为peapod.用金刚石对顶砧(DAC)装置获得高压，在高压下同时利用紫外激光处理样品，通过激光和压力的共同作用研究了C60分子在碳管内的聚合相变.在21.5GPa高压下，同时紫外激光(325nm)照射30min后，拉曼光谱表明C60分子在碳管内发生了聚合，形成一维链状O相聚合结构，且该相变是不可逆的.
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关键词:
- C60 peapod /
- 紫外激光 /
- 高压 /
- 拉曼光谱
The C60@SWNT (peapod) samples were prepared by the vapor diffusion method. Polymerization of C60 molecules in single walled carbon nanotubes (SWNTs) under high pressure and simultaneous irradiation of UV laser (325 nm) has been carried out for the first time by using diamond anvil cell. Raman spectra of the peapod samples decompressed from high pressure indicated that C60 molecules form one-dimensional orthorhombic polymer in SWNTs under UV laser irradiation at a high pressure of 21.5GPa, which is lower than that for the polymerization of samples induced by high pressure only. The polymerization is an irreversible phase transition in the peapod.-
Keywords:
- C60 peapod /
- UV laser /
- high pressure /
- Raman spectra
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