Coupled thermogravimetry, mass spectrometry, and infrared spectroscopy for quantification of surface functionality on single-walled carbon nanotubes

热重分析 碳纳米管 质谱法 表面改性 化学 分析化学(期刊) 纳米管 红外光谱学 解吸 热脱附 材料科学 纳米技术 有机化学 物理化学 无机化学 吸附 色谱法
作者
Christopher T. Kingston,Yadienka Martinez‐Rubi,Jingwen Guan,Michael Barnes,Christine Scriver,Ralph E. Sturgeon,Benoît Simard
出处
期刊:Analytical and Bioanalytical Chemistry [Springer Science+Business Media]
卷期号:396 (3): 1037-1044 被引量:16
标识
DOI:10.1007/s00216-009-3205-y
摘要

We have successfully applied coupled thermogravimetry, mass spectrometry, and infrared spectroscopy to the quantification of surface functional groups on single-walled carbon nanotubes. A high-purity single-walled carbon nanotube sample was subjected to a rapid functionalization reaction that attached butyric acid moieties to the nanotube sidewalls. This sample was then subjected to thermal analysis under inert desorption conditions. Resultant infrared and mass spectrometric data were easily utilized to identify the desorption of the butyric acid groups across a narrow temperature range and we were able to calculate the degree of substitution of the attached acid groups within the nanotube backbone as 1.7 carbon atoms per hundred, in very good agreement with independent analytical measurements made by inductively coupled plasma optical emission spectrometry (ICP-OES). The thermal analysis technique was also able to discern the presence of secondary functional moieties on the nanotube samples that were not accessible by ICP-OES. This work demonstrates the potential of this technique for assessing the presence of multiple and diverse functional addends on the nanotube sidewalls, beyond just the principal groups targeted by the specific functionalization reaction.
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