Near-infrared absorbance of single-walled carbon nanotubes dispersed in dimethylformamide

被引：41

作者：

Krupke, R ^{[1
]}

Hennrich, F

Hampe, O

Kappes, MM

机构：

[1] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany

[2] Univ Karlsruhe, Inst Phys Chem 2, D-76128 Karlsruhe, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2003年 / 107卷 / 24期

关键词：

D O I：

10.1021/jp034077w

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：

Absorption spectra of single-walled carbon nanotubes (SWNT) dispersed in dimethylformamide (DMF) have been recorded in the visible to near-infrared range. Besides broad absorption bands, the spectra show a sharp peak at 5187 cm(-1), which has been attributed in the literature to the absorption of semiconducting nanotubes with a band gap of 0.64 eV [Ausman et al. J. Phys. Chem. B 2000, 104, 8911]. On the basis of absorbance measurements for samples that show the sharp absorbance peak but do not contain SWNTs, we conclude that the origin of the peak at 5187 cm(-1) is not due to semiconducting nanotubes but due to water present in the SWNT/DMF suspension. A comparative study of D2O in DMF reproduces a similar peak that is isotope-shifted into the near-infrared.

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页码：5667 / 5669

页数：3

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