Efficient separation of semiconducting single-wall carbon nanotubes by surfactant-composition gradient in gel filtration
Efficient separation of semiconducting single-wall carbon nanotubes by surfactant-composition gradient in gel filtration
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DOI：
10.7567/jjap.56.015101
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发表时间：
2016
影响因子：
1.5
通讯作者：
Boanerges Thendie;H. Omachi;Y. Miyata;H. Shinohara
中科院分区：
文献类型：
--
作者：
Boanerges Thendie;H. Omachi;Y. Miyata;H. Shinohara
凝胶过滤是一种有效的分离和纯化半导体单壁碳纳米管（s-SWCNT）与其金属（m-）对应物的方法。然而，少量的m-SWCNT通常保留，从而降低了所获得的s-SWCNT的纯度。我们已经研究了洗脱与梯度浓度的表面活性剂的分离和纯度的s-SWCNTs的效果。通过利用我们开发的受控低梯度洗脱（CLGE），s-SWCNTs的纯度从常规分离获得的90%提高到94%。此外，CLGE同时允许基于直径的小直径s-SWCNT的分离，这表明CLGE用于s-SWCNT分离的前景。
Gel filtration is a powerful method of separating and purifying semiconducting single-wall carbon nanotubes (s-SWCNTs) from their metallic (m-) counterpart. However, a small amount of m-SWCNTs usually remains, thus reducing the purity of the s-SWCNTs obtained. We have investigated the effect of elution with a gradient concentration of the surfactant on the separation and purity of s-SWCNTs. By utilizing the controlled low-gradient elution (CLGE) that we have developed, the purity of s-SWCNTs is improved to 94% from the 90% obtained with the conventional separation. Furthermore, CLGE simultaneously allows diameter-based separation of small-diameter s-SWCNTs, which indicates a promising utilization of CLGE for s-SWCNT separation.