DOI: 10.1063/1.1476070. Polymerized carbon nitride nanobells

10.1063/1.1476070

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

Well-aligned carbon nitride nanotubes are fabricated by microwave plasma assisted chemical vapor deposition using iron as the catalyst. These nanotubes are linearly polymerized by carbon nitride nanobells with catalyst particles in the root, as revealed by high-resolution transmission electron microscopy. Carbon nitride nanotube film is analyzed by x-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), and Raman spectroscopy. Both XPS and AES reveal a nitrogen content of about 2% in the film. Raman spectroscopy exhibits a good crystallization of these carbon nitride nanotubes. Electron energy loss spectroscopy is used to study the local distribution of nitrogen in a single nanotube, which indicates that nitrogen prefers to locate at curved graphite sheets, at the top of the nanobells, and that incorporation of nitrogen results in the decrease of the crystallization. Based on these results, a growth model is proposed to explain this periodically stacked nanobell structure. In this model, we propose that graphite sheets only precipitate along the surface of catalyst particles and that lower growth rate at the top curve surface of the bell-like catalyst particle is the key factor influencing formation of this special microstructure. A heterojunction between a tubular carbon nanotube and a carbon nitride nanobell also has been fabricated by a two-step growth technique. And short carbon nitride nanotubes with a few nanobells or even just one nanobell are obtained by both physical and chemical methods. Furthermore, we studied the field emission properties and have obtained a threshold field of as low as about 1 V/μm. A novel side-emission mechanism has been proposed based on the special polymerized nanobell structures.

Bibliography

Zhang, G. Y., Ma, X. C., Zhong, D. Y., & Wang, E. G. (2002). Polymerized carbon nitride nanobells. Journal of Applied Physics, 91(11), 9324â9332.

Authors 4

G. Y. Zhang (first)
X. C. Ma (additional)
D. Y. Zhong (additional)
E. G. Wang (additional)

References 30 Referenced 72

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 10:23 a.m.)
Deposited	1 year, 7 months ago (Feb. 5, 2024, 11:34 a.m.)
Indexed	1 year ago (Aug. 12, 2024, 12:31 p.m.)
Issued	23 years, 3 months ago (June 1, 2002)
Published	23 years, 3 months ago (June 1, 2002)
Published Print	23 years, 3 months ago (June 1, 2002)

Funders 0

None

BibTeX

@article{Zhang_2002, title={Polymerized carbon nitride nanobells}, volume={91}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1476070}, DOI={10.1063/1.1476070}, number={11}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Zhang, G. Y. and Ma, X. C. and Zhong, D. Y. and Wang, E. G.}, year={2002}, month=jun, pages={9324–9332} }

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