Ab initio study of the effect of nitrogen on carbon nanotube growth
Ahn, Hyo-Shin; Lee, Seung-Cheol; Han, Seungwu; Lee, Kwang-Ryeol; Kim, Doh-Yeon; Ahn, Hyo-Shin; Future Technology Research Division, Korea Institute of Science and Technology, Seoul 136-791, Korea ; School of Materials Science and Engineering, Seoul National University, Seoul 151-742, Korea; Lee, Seung-Cheol; Future Technology Research Division, Korea Institute of Science and Technology, Seoul 136-791, Korea; Han, Seungwu; Department of Physics and Division of Nano Science, Ewha Womans University, Seoul 120-750, Korea; Lee, Kwang-Ryeol; Future Technology Research Division, Korea Institute of Science and Technology, Seoul 136-791, Korea ;; Kim, Doh-Yeon; School of Materials Science and Engineering, Seoul National University, Seoul 151-742, Korea
Журнал:
Nanotechnology
Дата:
2006-02-14
Аннотация:
The energetics and kinetics of carbon nanotube growth are studied using an ab initio method. Specifically, the role of the nitrogen atom is analysed in detail for various pathways to the growth of the nanotube edge. The energy barriers are estimated by identifying transition states and it is found that the growth rate of a zigzag-type edge is significantly enhanced. The underlying physical mechanism is explained based on the electronic structure of nitrogen atoms embedded in the carbon networks.
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