Controlled dispersion of carbon nanospheres through surface functionalization
| Autor: | Keith W. Gneshin, Andrew M. Herring, Margaret J. Sobkowicz, J. Thomas McKinnon, John R. Dorgan |
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| Rok vydání: | 2009 |
| Předmět: |
Thermogravimetric analysis
Materials science Analytical chemistry chemistry.chemical_element Infrared spectroscopy General Chemistry Nanomaterials symbols.namesake chemistry Chemical engineering symbols Surface modification General Materials Science Solubility Fourier transform infrared spectroscopy Raman spectroscopy Carbon |
| Zdroj: | Carbon. 47:622-628 |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2008.10.051 |
| Popis: | The physicochemical properties of cellulose-derived hollow, multiwalled carbon nanospheres (CNS) are investigated. Covalent functionalization with a 12-chain alkylamine and a short-chain di-alcohol is demonstrated. The resulting nanomaterials show increased and reversed solubility compared with the starting CNS and it is shown that the solubility can be tailored according to the choice of surface grafted moiety. Raman spectroscopy reveals similar features to those of other multiwalled carbon nanostructures. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy are used to characterize the CNS at each step in the reaction scheme, and thermogravimetric analysis is used to quantify the grafting. The grafting technique results in functionalization of 0.27% of total carbon atoms, estimated to correspond to about 5% of surface carbons. |
| Databáze: | OpenAIRE |
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