Selective Bundling of Zigzag Single-Walled Carbon Nanotubes

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• 作者：Carolin Blum ; Ninette Stürzl ; Frank Hennrich ; Sergei Lebedkin ; Sebastian Heeg ; Heiko Dumlich ; Stephanie Reich ; Manfred M. Kappes
• 刊名：ACS Nano
• 出版年：2011
• 出版时间：April 26, 2011
• 年：2011
• 卷：5
• 期：4
• 页码：2847-2854
• 全文大小：907K
• 年卷期：0
• ISSN：1936-086X

文摘

A simple, high throughput fractionation procedure for aqueous/SDS (sodium dodecyl sulfate) suspensions of single-walled carbon nanotubes (SWNTs) is presented, which yields thin bundles of semiconducting-SWNTs with small chiral angles. To demonstrate this we show the photoluminescence signatures of nanotube suspensions that contain almost exclusively zigzag and near-zigzag tubes. Starting suspensions and resulting fractions were characterized using optical absorption, resonance Raman and photoluminescence spectroscopies as well as scanning force microscopy. Taken together with literature observations, our findings suggest that near zigzag edge tubes of similar diameters in a bundle are harder to separate from each other than for other chiral index combinations. We discuss the implications of these observations for SWNT growth and dispersion.