Surface modification of carbon nanohorns by helium plasma and ozone treatments
| العنوان: | Surface modification of carbon nanohorns by helium plasma and ozone treatments |
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| المؤلفون: | Mitsunobu Yoshida, Toru Iijima, Yasuhiko Hayashi, P. S. Karthik, Zaw Lin, Masaki Hada, Takeshi Nishikawa |
| المصدر: | Japanese Journal of Applied Physics. 56:01AB08 |
| بيانات النشر: | IOP Publishing, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Flocculation, Ozone, Atmospheric pressure, Precipitation (chemistry), Inorganic chemistry, General Engineering, General Physics and Astronomy, chemistry.chemical_element, 02 engineering and technology, Dielectric barrier discharge, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Chemical engineering, Surface modification, 0210 nano-technology, Dispersion (chemistry), Carbon |
| الوصف: | In this paper, we describe the effects of helium plasma and ozone treatments on the dispersibility of carbon nanohorns (CNHs) in water. The experimental setups have been designed to efficiently generate helium plasma and ozone by dielectric barrier discharge at atmospheric pressure. After being treated with ozone, the oxygen-containing functional groups were introduced to the surface of CNHs, and are responsible for better dispersion. Helium plasma treatment was performed separately and it resulted in hydroxyl functional groups on the surface of CNHs. It was also found that the sizes of CNHs in water were smaller after ozone treatment. However, plasma-treated CNHs were bigger than ozone treated CNHs. The dispersed CNHs modified by ozone treatment were stable for more than three months without precipitation. In contrast, though helium plasma treatment introduced hydroxyl groups to the surface of CNHs, the dispersibility decreased and the flocculation of CNHs was observed in a few minutes. |
| تدمد: | 1347-4065 0021-4922 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::62dab326cf67c515a690580537505125Test https://doi.org/10.7567/jjap.56.01ab08Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........62dab326cf67c515a690580537505125 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13474065 00214922 |
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