Effective disentangling method of bundled multi-walled carbon nanotubes into individual multi-walled carbon nanotubes by magnetic-field induction

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• 作者：Seung Yong Son^a ; Soong Ho Um^a ; ^b ; Hoon-Sik Jang^c ; Sang Koo Jeon^c ; Seung Hoon Nahm^c ; Hyun Wook Kim^d ; Young Heum Yeon^d ; Jongwook Bae^a ; Dong Hyun Lee^a ; ^{dhlee@skku.edu}
• 关键词：Carbon nanotubes ; Magnetic-field induction ; Disentanglement ; CNT agglomerates ; Magnetite
• 刊名：Journal of Industrial and Engineering Chemistry
• 出版年：2017
• 出版时间：25 February 2017
• 年：2017
• 卷：46
• 期：Complete
• 页码：28-34
• 全文大小：1825 K
• 卷排序：46

文摘

A simple method that uses magnetic field induction for the disentanglement of bundled multiwall carbon nanotubes (MWCNTs) that are massively aggregated in a single and intact form was investigated. MWCNTs exposed to a 1 Tesla (T) field periodically switched on and off were separated into individual MWCNTs using 4,4′-azobis(4-cyanovaleric acid) as a radical initiator with iron oxide nanoparticles. The study results show that, in accordance with the dissipation working principle, MWCNT bundles under 40 nN achieved complete disentanglement within a few hours, and these results were theoretically verified by an Opera 3D simulation. We anticipate that single CNTs obtained using our method will have applications in several CNT research areas ranging from electronic devices to biocomputers.