New metric for evaluating the purity of single-walled carbon nanotubes using ultraviolet-visible-near infrared absorption spectroscopy

被引：4
|
作者：
Goak, Jeung Choon [1 ]
Lee, Han Sung [1 ]
Han, Jong Hun [2 ]
Park, Jun-Young [1 ]
Seo, Yongho [1 ]
Kim, Ki Beum [1 ]
Lee, Naesung [1 ]
机构：
[1] Sejong Univ, Dept Nanotechnol & Adv Mat Engn, Seoul 143747, South Korea
[2] Chonnam Natl Univ, Sch Appl Chem Engn, Kwangju 500757, South Korea
来源：
CARBON | 2014年 / 75卷
基金：
新加坡国家研究基金会;
关键词：
OPTICAL-PROPERTIES; CATALYTIC GROWTH; IR SPECTROSCOPY; ARC-DISCHARGE; PURIFICATION; OXIDATION; FILMS; SPECTRA;
D O I：
10.1016/j.carbon.2014.03.032
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Accurate purity evaluation of single-walled carbon nanotubes (SWCNTs) forms the basis for an improvement of material quality during synthesis and purification. We propose a novel purity evaluation method of as-produced and purified SWCNTs by using ultraviolet-visible-near infrared absorption spectroscopy. Our approach integrates the absorption peaks from the interband electronic transitions of semiconducting and metallic tubes after the linear subtraction of pi-plasmon contribution in optical absorption spectra from SWCNT-containing samples. For the constructed sample sets prepared by mixing designed amounts of highly pure SWCNTs and carbonaceous impurities, this method has demonstrated quite a good closeness of the measured purities to the designed ones. Our novel purity-evaluation method has also verified its usability for a set of arc-produced samples having different SWCNT purities, prepared by isothermal oxidation at 275 similar to 475 degrees C. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：68 / 80
页数：13
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