期刊
DIAMOND AND RELATED MATERIALS
卷 19, 期 10, 页码 1199-1206出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2010.05.008
关键词
Chemical vapor deposition (CVD); N-doped SWCNT; Raman spectroscopy; X-ray photoelectron spectroscopy (XPS); Electrical properties
类别
资金
- Leibniz Institute for Solid State and Materials Research Dresden
- Egyptian Ministry of Higher Education and Scientific Research
Nitrogen-doped single walled carbon nanotubes (SWCNTs) have been synthesized via the thermal decomposition of ferrocene using different ratios of acetonitrile/ethanol feedstock mixtures during the chemical vapor deposition process. The experiments were performed at 950 C and 2 bar. The concentration of acetonitrile in the mixtures was varied from 0% to 100%. High resolution transmission electron microscopy and Raman spectroscopical measurements revealed the formation of SWCNTs for all mixtures. X-ray photoelectron spectroscopical analysis show nitrogen doping levels of up to 2 at.%. The doping levels increase as the acetonitrile concentration increases. The nitrogen incorporation is predominantly in the pyridine form. Electrical conductivity measurements show the dependence of conductivity as a function of nitrogen incorporation in the SWCNTs. (c) 2010 Elsevier B.V. All rights reserved.
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