Solubilization of single-wall carbon nanotubes by supramolecular encapsulation of helical amylose
Solubilization of single-wall carbon nanotubes by supramolecular encapsulation of helical amylose
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DOI：
10.1021/ja029233b
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发表时间：
2003-04-16
影响因子：
15
通讯作者：
Buckley, LJ
中科院分区：
文献类型：
--
作者：
Kim, OK;Je, JT;Buckley, LJ
我们开发了一种简单、有效的方法，用于单壁碳纳米管（SWNTs）与直链淀粉在水溶液DMSO中的增溶。这一过程需要两个重要条件，单壁碳纳米管的预处理和随后在DMSO/H2O的最佳混合物中处理直链淀粉。前一个步骤分离SWNT束，后一个步骤提供SWNT与直链淀粉的最大合作相互作用，导致立即和完全的增溶。最佳溶剂条件约为10 - 20% DMSO，其中直链淀粉呈随机构象或中断螺旋状。这表明直链淀粉螺旋不是单壁碳纳米管封装的先决条件。扫描电镜（SEM）和原子力显微镜（AFM）扫描结果显示，包裹在单壁碳纳米管周围的带状结构松散扭曲，局部缠绕成多重扭曲，但在单壁碳纳米管胶囊上未见寄主直链淀粉团块。
We have developed a simple, efficient process for solubilization of single-wall carbon nanotubes (SWNTs) with amylose in aqueous DMSO. This process requires two important conditions, presonication of SWNTs and subsequent amylose treatment in an optimum mixture of DMSO/H2O. The former step separates SWNT bundles, and the latter step provides a maximum cooperative interaction of SWNTs with amylose, leading to the immediate and complete solubilization. The best solvent condition for this is around 10−20% DMSO, in which amylose assumes a random conformation or an interrupted helix. This indicates that the amylose helix is not the prerequisite for encapsulation of SWNTs. The SEM and AFM images of the encapsulated SWNTs manifest loosely twisted ribbons wrapping around SWNTs, which are locally intertwined as a multiple twist, but no clumps of the host amylose are seen on SWNT capsules.