CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Prev
Next
|
|
|
Experimental and theoretical study on field emission properties of zinc oxide nanoparticles decorated carbon nanotubes |
Li Xin (李昕), Zhou Wei-Man (周伟满), Liu Wei-Hua (刘卫华), Wang Xiao-Li (王小力) |
Department of Microelectronics, Xi'an Jiaotong University, Xi'an 710049, China |
|
|
Abstract Field emission properties of zinc oxide (ZnO) nanoparticles (NPs) decorated carbon nanotubes (CNTs) are investigated experimentally and theoretically. CNTs are in situ decorated with ZnO NPs during the growth process by chemical vapor deposition using a carbon source from the iron phthalocyanine pyrolysis. The experimental field emission test shows that the ZnO NP decoration significantly improves the emission current from 50 μA to 275 μA at 550 V and the reduced threshold voltage from 450 V to 350 V. The field emission mechanism of ZnO NPs on CNTs is theoretically studied by the density functional theory (DFT) combined with the Penn–Plummer method. The ZnO NPs reconstruct the ZnO–CNT structure and pull down the surface barrier of the entire emitter system to 0.49 eV so as to reduce the threshold electric field. The simulation results suggest that the presence of ZnO NPs would increase the LDOS near the Fermi level and increase the emission current. The calculation results are consistent with the experiment results.
|
Received: 03 October 2014
Revised: 30 December 2014
Accepted manuscript online:
|
PACS:
|
71.55.-i
|
(Impurity and defect levels)
|
|
71.15.Mb
|
(Density functional theory, local density approximation, gradient and other corrections)
|
|
73.23.Ad
|
(Ballistic transport)
|
|
73.63.Fg
|
(Nanotubes)
|
|
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 91123018, 61172040, and 61172041) and the Natural Science Foundation of Shaanxi Province, China (Grant No. 2014JM7277). |
Corresponding Authors:
Li Xin
E-mail: lx@mail.xjtu.edu.cn
|
About author: 71.55.-i; 71.15.Mb; 73.23.Ad; 73.63.Fg |
Cite this article:
Li Xin (李昕), Zhou Wei-Man (周伟满), Liu Wei-Hua (刘卫华), Wang Xiao-Li (王小力) Experimental and theoretical study on field emission properties of zinc oxide nanoparticles decorated carbon nanotubes 2015 Chin. Phys. B 24 057102
|
[1] |
Sun X W, Huang J Z, Wang J X and Xu Z 2008 Nano Lett. 8 1219
|
[2] |
Peng N, Zhang Q, Lee Y C, Tan O K and Marzari N 2008 Sensor. Actuat. B 132 191
|
[3] |
Wang Q H, Yan M and Chang R P 2001 Appl. Phys. Lett. 78 1294
|
[4] |
Zhang J M, Du X J, Wang S F and Xu K W 2009 Chin. Phys. B 18 5468
|
[5] |
Verma P, Gautam S, Pal S, Kumar1 P and Chaturvedi P 2008 Defence Sci. J. 58 650
|
[6] |
Kim S, Cho E, Han S and Cho Y 2009 Solid State Commun. 149 670
|
[7] |
Wang Y Jun, Wang L D, Yang M and Yan C 2011 Chin. Phys. B 20 117304
|
[8] |
Jin L, Fu H G, Xie Y and Yu H T 2012 Chin. Phys. B 21 057901
|
[9] |
Korobeinyk A V, Whitby R L D, Niu J J, Gogotsi Y and Mikhalovsky S V 2011 Mater. Chem. Phys. 128 514
|
[10] |
Ratkovic S, Vujicic D, Kiss E, Boskovic G and Geszti O 2011 Mater. Chem. Phys. 129 398
|
[11] |
Li X, Liu W and Zhu C 2008 J. Vac. Sci. Technol. B 26 171
|
[12] |
Papadopoulos C A, Vlachos D S and Avaritsiotis J N 1996 Sensor. Actuat. B 32 61
|
[13] |
Li X, Zhao D C, Pang K G, Pang J C, Liu W H, Liu H Z and Wang X L 2013 Appl. Surf. Sci. 283 740
|
[14] |
Penn D R 1976 Phys. Rev. B 14 849
|
[15] |
Fairchild S B, Back T C, Murray P T and Cahay M M 2011 J. Vac. Sci. Technol. A 29 031402
|
[16] |
Choi I M, Woo S Y and Hong S S 2006 J. Vac. Sci. Technol. A 24 1556
|
[17] |
Zhang X and Song Y R 2014 Chin. Phys. B 23 064204
|
[18] |
Xie Y and Zhang J M 2011 Chin. Phys. B 20 127302
|
[19] |
Liu C L, Kim K S and Baek J 2009 Carbon 47 1158
|
[20] |
Mayer A, Miskovsky N M, Cutler P H and Lambin P 2003 Phys. Rev. B 68 235401
|
[21] |
Liu H Z, Ma H, Zhou W M, Liu W H, Zheng J and Li X 2012 Appl. Surf. Sci. 258 1991
|
[22] |
Liu X H, Zhu C C and Liu W H 2005 Mater. Chem. Phys. 92 473
|
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|