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首页> 外文期刊>Nanotechnology >High-efficient and environmentally friendly enrichment of semiconducting single-walled carbon nanotubes by combining short-time electrochemical pre-oxidation and combustion
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High-efficient and environmentally friendly enrichment of semiconducting single-walled carbon nanotubes by combining short-time electrochemical pre-oxidation and combustion

机译：通过组合短时电化学预氧化和燃烧，通过组合短时间导电单壁碳纳米管的高效和环保富集

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摘要

High purity semiconducting single-walled carbon nanotubes (s-SWCNTs) have bright prospects in the field of microelectronics, but their enrichment processes are usually very complicated and cost time and energy, which represent a major impediment for their future applications. Here, we report on a new efficient covalent modification enrichment approach that tackles this problem. Our method is to first selectively functionalize the surface of arc-discharge metallic single-walled carbon nanotubes (m-SWCNTs) rapidly by electrochemical pre-oxidation at 7.0 V in 0.1 M KCl aqueous solution, and subsequently followed up by removing the m-SWCNTs with a short-time combustion process at 600 degrees C for 30 s to enrich high purity s-SWCNTs. Although the surface of the s-SWCNTs was functionalized and heat-treated, the intrinsic tubular structure and electronic characteristics were well maintained. Besides, our approach, without any complex equipment or toxic reagents, is energy and time saving and can be easily scaled up. Milligrams of high-quality s-SWCNTs with high purity of more than 95 wt% can be easily obtained in only several minutes. The retention rate of s-SWCNTs after combustion is as high as 61 wt%.
机译：高纯度半导体的单壁碳纳米管（S-SWCNT）在微电子领域具有明亮的前景，但它们的富集过程通常是非常复杂和成本的时间和能量，这代表了未来应用的主要障碍。在这里，我们报告了一种新的高效共价修改富集方法，解决了这个问题。我们的方法是首先通过在0.1M KCl水溶液中在7.0V中的电化学预氧化在0.1M kCl水溶液中快速选择性地官能化电弧放电金属单壁碳纳米管（M-SWCNT）的表面，随后通过除去M-SWCNT来进行随后进行在600℃下的短时燃烧过程30秒，以丰富高纯度S-SWCTS。虽然S-SWCNTS的表面被官能化并进行热处理，但是固有管状结构和电子特性得到很好地保持。此外，我们的方法，没有任何复杂的设备或有毒试剂，是节能，可以很容易地缩放。在仅几分钟内，可以轻松获得高纯度高于95wt％的高质量S-SWCNTS的毫克。燃烧后S-SWCNT的保留率高达61wt％。

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