The quantitative characterization of the dispersion state of single-walled carbon nanotubes using Raman spectroscopy and atomic force microscopy
| Autor: | Young Jin Kim, Dokyung Yoon, Jae-Boong Choi, Chang Soo Han, Seunghyun Baik |
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| Rok vydání: | 2008 |
| Předmět: |
Aqueous solution
technology industry and agriculture Analytical chemistry chemistry.chemical_element General Chemistry Carbon nanotube law.invention Optical properties of carbon nanotubes chemistry.chemical_compound symbols.namesake chemistry law Sodium sulfate symbols General Materials Science Mica Raman spectroscopy Dispersion (chemistry) Carbon |
| Zdroj: | Carbon. 46:1530-1534 |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2008.06.046 |
| Popis: | A quantitative method to evaluate the degree of dispersion of single-walled carbon nanotubes (SWCNTs), produced by the high-pressure carbon monoxide process, was developed using Raman spectroscopy and atomic force microscopy (AFM). Nanotubes were dispersed in sodium dodecyl sulfate aqueous solution at seven different dispersion states by controlling ultra-sonication and centrifugation parameters. It is known that the intensity of a Raman peak at 267 cm−1, at the excitation wavelength of 785 nm, is qualitatively proportional to the degree of aggregation. Here, we provide a quantitative calibration technique which involves single-layer spin-deposition of SWCNTs on mica substrates and z-scan analysis of AFM. The trend of the height measurements of AFM precisely matched that of the Raman peak at 267 cm−1. Therefore, this approach can be used to quantitatively characterize the dispersion state of SWCNTs. |
| Databáze: | OpenAIRE |
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