Browse > Article

Effects of Carbon Nitride Surface Layers and Thermal Treatment on Field-Emission and Long-Term Stability of Carbon Nanotube Micro-Tips  

Noh, Young-Rok (Dept. of Electronic, Electrical, Control and Instrumentation Engineering, Hanyang University)
Kim, Jong-Pil (Dept. of Electronic, Electrical, Control and Instrumentation Engineering, Hanyang University)
Park, Jin-Seok (Dept. of Electronic, Electrical, Control and Instrumentation Engineering, Hanyang University)
Publication Information
Journal of the Semiconductor & Display Technology / v.9, no.1, 2010 , pp. 41-47 More about this Journal
Abstract
The effects of thermal treatment on CNTs, which were coated with a-$CN_x$ thin film, were investigated and related to variations of chemical bonding and morphologies of CNTs and also properties of field emission induced by thermal treatment. CNTs were directly grown on nano-sized conical-type tungsten tips via the inductively coupled plasma-chemical vapor deposition (ICP-CVD) system, and a-$CN_x$ films were coated on the CNTs using an RF magnetron sputtering system. Thermal treatment on a-$CN_x$ coated CNT-emitters was performed using a rapid thermal annealing (RTA) system by varying temperature ($300-700^{\circ}C$). Morphologies and microstructures of a-$CN_x$/CNTs hetero-structured emitters were analyzed by FESEM and HRTEM. Chemical composition and atomic bonding structures were analyzed by EDX, Raman spectroscopy, and XPS. The field emission properties of the a-$CN_x$/CNTs hetero-structured emitters were measured using a high vacuum (below $10^{-7}$ Torr) field-emission measurement system. For characterization of emission stability, the fluctuation and degradation of the emission current were monitored in terms of operation time. The results were compared with a-$CN_x$ coated CNT-emitters that were not thermally heated as well as with the conventional non-coated CNT-emitters.
Keywords
Carbon nanotube; Amorphous carbon nitride; Thermal treatment; Field emission; Long-term stability;
Citations & Related Records
연도 인용수 순위
  • Reference
1 F. Jin, Y. Liu, C. M. Day, S. A. Little, "Enhanced electron emission from functionalized carbon nanotubes with a barium strontium oxide coating produced by magnetron sputtering," Carbon, Vol. 45, pp.587-593, 2007.   DOI   ScienceOn
2 C. Liu, K. S. Kim, J. Baek, Y. Cho, S. Han, S. W. Kim, N. K. Min, Y. Choi, J. U. Kim, and C. J. Lee, "Improved field emission properties of double-walled carbon nanotubes decorated with Ru nanoparticles," Carbon. Vol. 47, pp.1158-1164, 2009.   DOI   ScienceOn
3 L. Liao, J. C. Li, D. F. Wang, C. Liu, C. S. Liu, Q. Fu, and L. X. Fan, "Field emission property improvement of ZnO nanowires coated with amorphous carbon and carbon nitride films," Nanotechnology, Vol. 16, pp.985-989, 2005.   DOI   ScienceOn
4 Y. K. Kim, J. P. Kim, C. K. Park, S. J. Yun, W. Kim, S. Heu, and J. S. Park, "Electron-emission properties of titanium carbide-coated carbon nanotubes grown on a nano-sized tungsten tip," Thin Solid Films, Vol. 517, pp.1156-1160, 2008.   DOI   ScienceOn
5 Y. Liu, L. Liu, P. Liu, L. Sheng, and S. Fan, "Plasma etching carbon nanotube arrays and the field emission properties," Diamond Relat. Mater., Vol. 13, pp.1609-1613, 2004.   DOI   ScienceOn
6 H. Y. Jung, S. M. Jung, and J. S. Suh, "Horizontallyaligned single-walled carbon nanotube field emitters fabricated on vertically aligned multi-walled carbon nanotube electrode arrays," Carbon, Vol. 46, pp.1345-1349, 2008.   DOI   ScienceOn
7 J. P. Kim, Y. K. Kim, C. K. Park, H. Y. Choi, C. H. Shon, J. U. Kim, and J. S. Park, "Long-term stability of various carbon-nanotube-based micro-tip emitters", Diamond Relat. Mater., Vol. 18, pp.486-489, 2009.   DOI   ScienceOn
8 C. J. Yang, J. I. Park, and Y. R. Cho, "Enhanced fieldemission obtained from NiO coated carbon nanotubes," Adv. Eng. Mater., Vol. 9, pp.88-91, 2007.   DOI   ScienceOn
9 Y. Morihisa, C. Kimura, M. Yukawa, H. Aoki, T. Kobayashi, S. Hayashi, S. Akita, Y. Nakayama, and T. Sugino, "Improved field emission characteristics of individual carbon nanotube coated with boron nitride nanofilm," J. Vac. Sci. Technol. B, Vol. 26(2), pp. 872-875, 2008.   DOI   ScienceOn
10 Y. Cho, C. Kim, H. Moon, Y. Choi, S. Park, C. K. Lee, and S. Han, "Electronic structure tailoring and selective adsorption mechanism of metal-coated nanotubes," Nano Lett., Vol. 8(1), pp.81-86, 2008.   DOI   ScienceOn
11 S. Shrestha, W. C. Choi, W. Song, Y. T. Kwon, S. P. Shrestha, and C. Y. Park, "Preparation and field emission properties of Er-decorated multiwalled carbon nanotubes," Carbon, Vol, 48, pp.54-59, 2010.   DOI   ScienceOn
12 W. T. Zheng, J. J. Li, X. Wang, X. T. Li, Z. S. Jin, B. K. Tay, and C. Q. Sun, "Electron emission of carbon nitride films and mechanism for the nitrogen-lowered threshold in cold cathode," J. Appl. Phys., Vol. 94, pp.2741-2745, 2003.   DOI   ScienceOn
13 Y. R. Noh, J. P. Kim, and J. S. Park, "Coating of carbon nanotubes with amorphous carbon nitride thin films and characterization of long-term emission stability," 37th ICMCTF(International Conference on Metallurgical Coatings and Thin Films), 2010.