A spectroscopic study of the fluorination and defluorination reactions on single-walled carbon nanotubes
A spectroscopic study of the fluorination and defluorination reactions on single-walled carbon nanotubes
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DOI：
10.1039/b109770a
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发表时间：
2002-05
影响因子：
3.3
通讯作者：
P. Marcoux;J. Schreiber;P. Batail;S. Lefrant;J. Renouard;Guy Michel Jacob;D. Albertini;J. Mevellec-J.-Meve
中科院分区：
文献类型：
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作者：
P. Marcoux;J. Schreiber;P. Batail;S. Lefrant;J. Renouard;Guy Michel Jacob;D. Albertini;J. Mevellec-J.-Meve
操纵孤立的单壁碳纳米管（SWNT），而不是束，导致了积极的研究领域的功能化，这样的碳化合物。目前存在从单壁碳纳米管获得一些新的可溶性大分子的不同方法。在这里，我们专注于非线性功能化。由于溶解度性质基本上取决于官能化程度，因此开发可靠且简单的方法来量化这一点非常重要。用X射线光电子能谱（XPS）测定了三种不同氟化单壁碳纳米管样品的CnF化学计量比。讨论了样品的拉曼光谱随掺杂程度的变化规律。原子力显微镜（AFM）的研究突出了最氟化的样品与大多数孤立的纳米管被观察到的良好的溶剂化性能。然后，我们利用这些良好的溶剂化性能，结合恢复原始的非氟化纳米管的可能性，进行表面增强拉曼光谱（Sers）的研究分散良好的单壁碳纳米管。这些研究证实了由于单壁碳纳米管聚集成束而产生的束效应。这种效应可以通过拉曼光谱法容易地观察到。
The manipulation of isolated single-wall carbon nanotubes (SWNTs), rather than bundles, has led to active research in the field of the functionalisation of such carbon compounds. Different ways exist today to obtain some new soluble macromolecules from SWNTs. Here we focus on the fluorination functionalisation. As the solubility properties depend essentially on the degree of functionalisation, it is important to develop reliable and simple methods to quantify this. The CnF stoichiometry of three different fluorinated SWNTs samples are determined with X-ray photoelectron spectroscopy (XPS). Then the evolution of the Raman spectra with the degree of fluorination of these samples is discussed. An atomic force microscopy (AFM) study highlights the good solvation properties of the most fluorinated sample with a majority of isolated nanotubes being observed. Then we take advantage of these good solvation properties, combined with the possibility of recovering the pristine non-fluorinated nanotubes, to carry out surface enhanced Raman spectroscopy (SERS) studies of well-dispersed SWNTs. These studies put in evidence the bundle effect, which is due to the agglomeration of SWNTs into bundles. This effect can be readily observed by Raman spectroscopy.