Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-27T01:49:03.554Z Has data issue: false hasContentIssue false
  • English
  • Français

LaB6 nanowires and their field emission properties

Published online by Cambridge University Press:  26 February 2011

Han Zhang ,
Jie Tang ,
Qi Zhang ,
Gongpu Zhao ,
Guang Yang ,
Jian Zhang ,
Otto Zhou  and
Luchang Qin
Han Zhang
Affiliation:
[email protected], University of North Carolina at Chapel Hill, Curriculum in Applied and Materials Sciences, 159-A, Phillips Hall, CB#3255,, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, 27599, United States
Jie Tang
Affiliation:
[email protected], National Institute for Materials Science, Japan
Qi Zhang
Affiliation:
[email protected], University of North Carolina at Chapel Hill, Department of Physics and Astronomy, United States
Gongpu Zhao
Affiliation:
[email protected], University of North Carolina at Chapel Hill, Department of Physics and Astronomy, United States
Guang Yang
Affiliation:
[email protected], University of North Carolina at Chapel Hill, Department of Physics and Astronomy, United States
Jian Zhang
Affiliation:
[email protected], University of North Carolina at Chapel Hill, Department of Physics and Astronomy, United States
Otto Zhou
Affiliation:
[email protected], University of North Carolina at Chapel Hill, Curriculum in Applied and Materials Sciences, United States
Luchang Qin
Affiliation:
[email protected], University of North Carolina at Chapel Hill, Curriculum in Applied and Materials Sciences, United States
Get access

Abstract

For field-induced electron emission, the two factors that enable a high emission current density at low applied voltages are (a) low work function of the emitter and (b) sharpness of the emitter tip. We have developed and applied a chemical vapor deposition method to synthesize single-crystalline LaB6 nanowires for applications as point electron emitters. The crystallographic orientation of the grown nanowires can be controlled by the catalysts used in synthesis and their typical diameter is ranged from below 20 nm to over 100 nm. The nanowires’ tip is either hemispherical or flat top with rectangular cross-section depending on the catalyst being utilized. The field emission properties have also been measured from the single nanowire emitters and the results are discussed for applications as point electron sources used in high performance electron optical instruments such as the transmission and scanning electron microscopes.

Keywords

nanostructurefield emissionchemical vapor deposition (CVD) (deposition)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 901: Symposium R – Assembly at the Nanoscale – Toward Functional Nanostructured Materials , 2005 , 0901-Rb15-06
Copyright
Copyright © Materials Research Society 2006

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

[1] Gesley, M., Swanson, L. W., Surface Sci. 146, 583 (1984).Google Scholar
[2] Swanson, L. W., Gesley, M. A., Davis, P. R., Surface Sci. 107, 263 (1981).Google Scholar
[3] Brodie, I., Spindt, C. A., Advances in Electronics and Electron Physics, Vol. 83, (Ed: Hawkes, P. W.), Academic Press, San Diego 1992, Ch. 2.Google Scholar
[4] Chernozatonskii, L. A., Gulyaev, Y. V., Kosakovskaja, Z. J., Sinitsyn, N. I., Torgashov, G. V., Zakharchenko, Y. F., Fedorov, E. A., Val'chuk, V. P., Chem. Phys. Lett. 233, 63 (1995).Google Scholar
[5] Rinzler, A. G., Hafner, J. H., Nikolaev, P., Lou, L., Kim, S. G., Tomanek, D., Nordlander, P., Colbert, D. T., Smalley, R. E., Science 269, 1550 (1995).Google Scholar
[6] Heer, W. A. D., Chatelain, A., Ugarte, D., Science 270, 1179 (1995).Google Scholar
[7] de Jonge, N., Lamy, Y., Schoots, K., Oosterkamp, T. H., Nature 420, 393 (2002).Google Scholar
[8] Zhang, J., Tang, J., Yang, G., Qiu, Q., Qin, L.-C., Zhou, O., Adv. Mater. 16, 1219 (2004).Google Scholar
[9] de Jonge, N., Bonard, J. M., Phil. Trans. R. Soc. Lond. A 362, 2239 (2004).Google Scholar
[10] de Jonge, N., Allioux, M., Oostveen, J. T., Teo, K. B. K., Milne, W. I., Phys. Rev. Lett. 94, 186807 (2005).Google Scholar
[11] Hafner, J. H., Cheung, C. L., Oosterkamp, T. H., Lieber, C. M., J. Phys. Chem. B 105, 743 (2001).Google Scholar
[12] Dean, K. A., Chalamala, B. R., Appl. Phys. Lett. 75, 3017 (1999).Google Scholar
[13] Lafferty, J.M., J. Appl. Phys. 22, 299 (1951).Google Scholar
[14] Zhang, H., Tang, J., Zhang, Q., Zhao, G., Yang, G., Zhang, J., Zhou, O., Qin, L.-C., Adv. Mater. (2006) in press.Google Scholar