In situ measurements of nanotube dimensions in suspensions by depolarized dynamic light scattering
In situ measurements of nanotube dimensions in suspensions by depolarized dynamic light scattering
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DOI：
10.1021/la049096r
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发表时间：
2004-11-23
期刊：
影响因子：
3.9
通讯作者：
Zakri, C
中科院分区：
文献类型：
--
作者：
Badaire, S;Poulin, P;Zakri, C
我们表明，碳纳米管（CNTs）的尺寸在悬浮液中可以用去偏振光动态光散射。利用这种原位技术的优势，我们详细研究了超声处理程序对表面活性剂溶液中碳纳米管的长度和直径的影响。超声波功率被证明是特别有效的解开纳米管，而在低功率下的长时间的超声波处理可以足以切断束有限的解开。最后，我们展示了CNT尺寸对CNT纤维的电性能的影响。稍微改变超声处理条件，从而改变悬浮的纳米管尺寸，可以影响纤维的电导率几乎2个数量级。
We show that the dimensions of carbon nanotubes (CNTs) in suspension can be characterized by depolarized dynamic light scattering. Taking advantages of this in situ technique, we investigate in detail the influence of sonication procedures on the length and diameter of CNTs in surfactant solutions. Sonication power is shown to be particularly efficient at unbundling nanotubes, whereas a long sonication time at low power can be sufficient to cut the bundles with limited unbundling. We finally demonstrate the influence of CNT dimensions on the electrical properties of CNT fibers. Slightly varying the sonication conditions, and thereby the suspended nanotube dimensions, can affect the fibers conductivity by almost 2 orders of magnitude.