Abstract
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.
| Original language | English |
|---|---|
| Article number | 01AB08 |
| Journal | Japanese Journal of Applied Physics |
| Volume | 56 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 1 2017 |
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ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)
Cite this
Surface modification of carbon nanohorns by helium plasma and ozone treatments. / Lin, Zaw; Iijima, Toru; Karthik, Paneer Selvam; Yoshida, Mitsunobu; Hada, Masaki; Nishikawa, Takeshi; Hayashi, Yasuhiko.
In: Japanese Journal of Applied Physics, Vol. 56, No. 1, 01AB08, 01.01.2017.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Surface modification of carbon nanohorns by helium plasma and ozone treatments
AU - Lin, Zaw
AU - Iijima, Toru
AU - Karthik, Paneer Selvam
AU - Yoshida, Mitsunobu
AU - Hada, Masaki
AU - Nishikawa, Takeshi
AU - Hayashi, Yasuhiko
PY - 2017/1/1
Y1 - 2017/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85009074901&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85009074901&partnerID=8YFLogxK
U2 - 10.7567/JJAP.56.01AB08
DO - 10.7567/JJAP.56.01AB08
M3 - Article
AN - SCOPUS:85009074901
VL - 56
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 1
M1 - 01AB08
ER -