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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >On the Stacking Behavior of Functionalized Single-Wall Carbon Nanotubes
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On the Stacking Behavior of Functionalized Single-Wall Carbon Nanotubes

机译：功能化单壁碳纳米管的堆叠行为

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Single-wall carbon nanotubes (SWNTs) were oxidatively functionalized by nitric acid treatment. The presence of carboxyl groups was proven by IR spectroscopy, matching earlier IR and NMR observations. Raman spectra in the radial breathing mode (RBM) and G line spectral windows were measured with six laser lines ranging from 457 to 647 nm. The RBM mode was observed to upshift by the functionalization with very little change in the spectral line shape. By the analysis of the spectral moments of the lines, this upshift is interpreted as a change in an empirical intertube interaction function. In agreement with previous TEM results, we have found that bundles in a pristine SWNT sample are significantly thinner (<10 tubes) than those in the oxidized samples (>30 tubes). Changes observed in solvatation properties and sample morphology could be explained on this basis. Our observations suggest that carboxyl related secondary bonding forces might also play a role in the stacking of oxidized SWNTs.
机译：单壁碳纳米管（SWNTs）通过硝酸处理被氧化功能化。通过红外光谱证实了羧基的存在，与早期的红外和核磁共振观察相符。径向呼吸模式（RBM）和G线光谱窗口的拉曼光谱是用范围从457到647 nm的六条激光线测量的。观察到RBM模式通过功能化而升档，而谱线形状的变化很小。通过分析线的频谱矩，将该升档解释为经验管间相互作用函数的变化。与先前的TEM结果一致，我们发现原始SWNT样品中的管束（<10管）比氧化样品（> 30管）中的管束显着更细。在此基础上可以解释观察到的溶剂化性质和样品形态的变化。我们的观察结果表明，与羧基有关的次级键合力也可能在氧化SWNT的堆积中起作用。

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