Optical absorption spectroscopy for determining carbon nanotube concentration in solution
Optical absorption spectroscopy for determining carbon nanotube concentration in solution
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DOI：
10.1016/j.synthmet.2007.06.012
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发表时间：
2007-07-01
期刊：
影响因子：
4.4
通讯作者：
Lee, Young Hee
中科院分区：
文献类型：
--
作者：
Jeong, Seok Ho;Kim, Ki Kang;Lee, Young Hee
提供了一种利用光学吸收光谱测定溶液中碳纳米管浓度的简单方法。比尔定律中单壁碳纳米管的消光系数是在减去等离子体背景后确定的。我们发现消光系数强烈依赖于谐振区的波长，而在等离激元扣除后，消光系数与非谐振区的波长无关。这项工作表明，一旦预先确定了材料的消光系数，就可以通过简单地测量吸光度来轻松确定分散在水溶液中的未知碳纳米管的浓度。 (C) 2007 Elsevier B.V. 保留所有权利。
A simple method of determining concentration of carbon nanotubes in solution was provided by using optical absorption spectroscopy. The extinction coefficient of single-walled carbon nanotubes in Beer's law was determined after subtraction of the plasmon background. We found that the extinction coefficient was strongly dependent on the wavelength in the resonant region, whereas this was independent of wavelength in the non-resonant region after plasmon subtraction. This work demonstrates that the concentration of unknown carbon nanotubes dispersed in aqueous solution can be easily determined by simply measuring absorbance, once the extinction coefficient of the material is determined in advance. (C) 2007 Elsevier B.V. All rights reserved.