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The structural stability and the electronic field emission properties of cone-capped carbon nanotubes have been deeply analyzed by the density functional theory. The results show that their structurs are much more stable than those of carbon nanocones and carbon nanotubes sealed with a C30 hemisphere, and their electronic field emission properties are closely related to the configuration of cone apex and the magnitude of cone angle. Meanwhile, the combination property of cone1@(6,6) with a ridge-shaped tip and 38.9° cone angle is optimal. When it is used as a field emission source the field emission current density and the lifetime of device will be remarkably increased.
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Keywords:
- cone-capped carbon nanotubes /
- electron field emission /
- structural stability /
- density functional theory
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[19] Liu H X, Zhang H M, Song J X, Zhang Z Y 2010 Chin. Phys. B 19 037104
[20] Shtogun Y V, Woods L M 2009 Carbon 47 3252
[21] Shen L, Wang L, Yang H F, Liu X J, Liu H P 2009 Chin. Phys. B 18 5277
[22] Javey A, Guo J, Dai H 2004 Phys. Rev. Lett. 92 106804
[23] Yao Z, Kane C L, Dekke C 2000 Phys. Rev. Lett. 84 2941
[24] Yun J N, Zhang Z Y, Yan J F, Deng Z H 2010 Chin. Phys. B 19 017101
[25] Miao L, Liu H J, Hu Y, Zhou X, Hu C Z, Shi J 2010 Chin. Phys. B 19 016301
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[1] De Heer W A, Chatelain A, Ugarte D 1995 Science 270 1179
[2] Meyyappan M 2005 Carbon Nanotubes: Science and Applications (California: CRC Press LLC) p223
[3] Shenderova O A, Lawson B L, Areshkin D 2001 Nanotechnology 12 191
[4] Heiberg-Andersen H, Skjeltorp A T, Sattler K 2008 Journal of Non-Crystalline Solids 06 120
[5] Wang L D, Chen G D, Zhang J Q, Yang M, Wang Y J, An B 2009 Acta. Phys. Sin. 58 7852 (in Chinese)[王六定、陈国栋、张较强、杨 敏、王益军、安 博 2009 58 7852]
[6] Jordan S P, Crespi V H 2004 Phys. Rev. Lett. 93 255504
[7] Shen H J, Shi Y J 2007 Journal of Atomic and Molecular Physics 24 883 (in Chinese)[沈海军、史友进 2007 原子与分子 24 883]
[8] Ge M, Sattler K 1994 Chem Phys. Lett. 220 192
[9] Zhang G Y, Wang E G. 2003 Phys. 32 567 (in Chinese) [张广宇、王恩哥 2003 物理 32 567]
[10] John A J, George W R, Svetlana D, Yury G 2003 Carbon 41 2085
[11] Delley B J 1990 Chem. Phys. 92 508
[12] Wang Y J, Wang L D, Yang M,Liu G Q, Yan C 2010 Acta Phys. Sin. 59 4950 (in Chinese) [王益军、王六定、杨 敏、刘光清、严 诚 2010 59 4950]
[13] Chen G H, Li Z B, Peng J, He C S, Wang W L, Deng S Z, Xu N S, Wang C Y, Wang S Y, Zheng X, Chen G H, Yu T 2007 Phys. Chem. C 111 4939
[14] Peng J, Li Z B, He C S, Chen G H, Wang W L, Deng S Z, Xu N S, Zheng X, Chen G H, Chris J E, Richard G F 2008 J. Appl. Phys. 104 014310
[15] Zheng X, Chen G H, Li Z B, Deng S Z, Xu N S 2004 Phys. Rev. Lett. 92 106803
[16] Kim C, Kim B, Lee S M 2002 Phys. Rev. B 65 18
[17] Qiao L, Zheng W T, Zhang L, Jiang Q 2007 Nanotechnology 18 155707
[18] Chen G D, Wang L D, An B, Yang M 2009 Acta Phys. Sin. 58 S254 (in Chinese) [陈国栋、王六定、安 博、杨 敏 2009 58 S254]
[19] Liu H X, Zhang H M, Song J X, Zhang Z Y 2010 Chin. Phys. B 19 037104
[20] Shtogun Y V, Woods L M 2009 Carbon 47 3252
[21] Shen L, Wang L, Yang H F, Liu X J, Liu H P 2009 Chin. Phys. B 18 5277
[22] Javey A, Guo J, Dai H 2004 Phys. Rev. Lett. 92 106804
[23] Yao Z, Kane C L, Dekke C 2000 Phys. Rev. Lett. 84 2941
[24] Yun J N, Zhang Z Y, Yan J F, Deng Z H 2010 Chin. Phys. B 19 017101
[25] Miao L, Liu H J, Hu Y, Zhou X, Hu C Z, Shi J 2010 Chin. Phys. B 19 016301
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