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A reference material of single-walled carbon nanotubes: quantitative chirality assessment using optical absorption spectroscopy

机译：单壁碳纳米管的参考材料：使用光学吸收光谱进行定量手性评估

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摘要

A reference material is essential to enable and accelerate commercialization of new materials. The National Institute of Standards and Technology (NIST) of the United States recently released the world's first reference material of a single-walled carbon nanotube (SWCNT) dispersion known as RM8281. Although the description of the material have been well documented by NIST, the chirality population, one of the most important properties, is yet unidentified for the RM8281. Here, we present for the first time a quantitative chirality assessment of the RM8281 reference material by using a method based on optical absorption spectroscopy. A universal background model has been established for SWCNT solid film samples, which proves to be the key to the successful chirality assessment. Our results show that approximately 75% of SWCNTs in RM8281 have diameters distributing in a narrow range of 0.7-0.9 nm, and about 69% of SWCNTs have chiral angles ranging from 15 degrees to 30 degrees. For the whole population, semi-conducting SWCNTs (similar to 74%) prevail significantly over metallic ones (similar to 26%). Importantly, similar to 25% of the total RM8281 SWCNT population was found to be (6,5) nanotube. High-resolution transmission electron microscopy and electron diffraction technique were utilized to complete an adequate statistical analysis of chirality distribution in RM8281, giving a satisfactory agreement with the above absorption spectrum measurements, thus, validating absorption spectroscopy serving as a fast and standard protocol for quantifying the SWCNT chirality population.
机译：参考资料对于启用和加速新材料的商业化至关重要。美国国家标准和技术研究所（NIST）最近发布了全球首个碳纳米管（SWCNT）分散的参考资料，称为RM8281。尽管材料的描述已经通过NIST进行了很好的记录，但是手感群体是最重要的属性之一，尚未鉴定为RM8281。这里，我们通过使用基于光学吸收光谱的方法首次呈现RM8281参考材料的定量手性程度评估。为SWCNT实心薄膜样品建立了一个通用背景模型，证明是成功的手性评估的关键。我们的研究结果表明，RM8281中大约75％的SWCNT在0.7-0.9nm的窄范围内分配的直径，约69％的SWCNT具有15度至30度的手性角。对于整个人口，半导体SWCNT（类似于74％）在金属体上显着占用（类似于26％）。重要的是，类似于25％的RM8281 SWCNT种群的25％被发现（6,5）纳米管。利用高分辨率透射电子显微镜和电子衍射技术在RM8281中的手性分布的充分统计分析，令人满意的符合上述吸收光谱测量值，因此验证了用作量化的快速和标准方案的吸收光谱验证SWCNT手感人口。

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  • 来源
    《RSC Advances》 |2015年第125期|共7页
  • 作者

    Tian Ying; Jiang Hua; Anoshkin Ilya V.; Kauppinen Lauri. J. I.; Mustonen Kimmo; Nasibulin Albert G.; Kauppinen Esko I.;

  • 作者单位

    Dalian Maritime Univ Dept Phys Dalian 116026 Liaoning Peoples R China;

    Aalto Univ Sch Sci Dept Appl Phys Espoo 00076 Finland;

    Aalto Univ Sch Sci Dept Appl Phys Espoo 00076 Finland;

    Aalto Univ Sch Sci Dept Appl Phys Espoo 00076 Finland;

    Aalto Univ Sch Sci Dept Appl Phys Espoo 00076 Finland;

    Aalto Univ Sch Sci Dept Appl Phys Espoo 00076 Finland;

    Aalto Univ Sch Sci Dept Appl Phys Espoo 00076 Finland;

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  • 正文语种 eng
  • 中图分类 化学;
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