Growth and characterization of nitrogen-doped single-walled carbon nanotubes by water-plasma chemical vapour deposition
- Authors
- Min, Yo-Sep; Bae, Eun Ju; Asanov, Igor P.; Kim, Un Jeong; Park, Wanjun
- Issue Date
- Jul-2007
- Publisher
- IOP PUBLISHING LTD
- Citation
- NANOTECHNOLOGY, v.18, no.28
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOTECHNOLOGY
- Volume
- 18
- Number
- 28
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/179907
- DOI
- 10.1088/0957-4484/18/28/285601
- ISSN
- 0957-4484
- Abstract
- Nitrogen- doped single-walled carbon nanotubes (N-SWNTs) are directly grown on SiO2/Si substrates at 450 degrees C with methane and ammonia gases by water-plasma chemical vapour deposition. The strongest radial breathing mode peak in Raman spectra of the grown N-SWNTs, probed with a 633 nm laser excitation, was assigned to (7, 5) semiconducting nanotubes with a diameter of 0.83 nm. As the doped nitrogen content increases, the D-band to G-band ratio in Raman spectra, indicating the imperfection of nanotubes, gradually increases and saturates at around 4%. X-ray photoelectron spectroscopy shows that nitrogen atoms are doped with a pyridine-like configuration in the N-SWNTs.
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