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標題: 單根閉口多壁奈米碳管的場發射特性
Field emission of close-tipped multiwalled individual carbon nanotubes
作者: 謝宗霖
Hsieh, Tsung-Lin
關鍵字: carbon nanotubes;奈米碳管;field emission;場發射
出版社: 物理學系所
引用: [1] Iijima S., Nature 354, 56 (1991) [2] 奈米碳管,成會明編著,張勁燕校訂,五南圖書出版股份有限公司2004年2月初版 [3] Ralph Krupke, Frank Hennrich, H. V. Lohneysen, M. M. Kappes, 18 JULY 2003 .VOL 301. SCIENCE. [4] M. S. Wang ,L. M. Peng , L. Y. Wang,C. H. Jin, and Q. Chen, J. Phys. Chem. B 2006,110, 9397-9402 [5] M. S. Wang, J. Y. Wang, and L.-M. Peng Appl. Phys. Lett. 88, 243108 (2006) [6] Ming-Way LEE, Yu-Shen CHEN, Wei-Ciao LAI, Yuen-Wuu SUEN, and Jong-Ching WU, J. J. Appl. Phy.,46(2007),430 [7] R. H. Fowler and L. W. Nordheim , Proc. Ror. Soc. London, Ser.A 119(1928),173 [8] R. C. Smith, R. D. Forrest, J. D. Carey, W. K. Hsu, and S. R. Silva,Appl. Phys. Lett. 87 (2005), 013111 [9] C. J. Edgcombe, and U. Valdrè, Philos. Mag. B, 82(2002), 9, 987 [10] C. J. Edgcombe, and U. Valdrè, J. Microsc.203.188(2001) [11] Zhi Xu, X. D. Bai, and E.G. Wang, Appl. Phys. Lett. 88(2006), 133107. [12] J. Y. Huang, K. Kempa, S. H. Jo, S. Chen, and Z. F. Ren, Appl. Phys. Lett. 87(2005), 053110. [13] J. M. Bonard, J. P. Salvetat, T. Stöckli, L. Forr´o, A. Châtelain, Appl. Phys. A 69(1999), 245 [14] Zhi Xu, X. D. Bai, and E.G. Wang, Appl. Phys. Lett. 87(2005), 163106 [15] King-Fu Hii, R. Ryan Vallancea_and Sumanth B. Chikkamaranahalli, M. Pinar Mengüç, Apparao M. RaoJ. Vac. Sci. Technol. B, Vol. 24, No. 3, May/Jun 2006 [16] M. S. Wang, L.-M. Peng, J. Y. Wang, C. H. Jin, and Q. Chen J. Phys. Chem. B 2006, 110, 9397-9402 [17] Yahachi Saitoa , Sashiro Uemura ,Carbon 38 (2000) 169 – 182 [18] Jung Inn Sohn and Seonghoon Lee, Y-H Song, S-Y Choi, K-I Cho, and K-S Nam Appl. Phys. Lett., Vol. 78, No. 7, 12 February 2001 [19] 陳育生,「單根奈米碳管幾何參數對場發射特性研究」,中興物理研究所。
In this experiment, we used the method of electron-beam lithography to make the field emission samples of close-tipped multiwalled individual carbon nanotubes. After getting the samples, we measured them in high vacuum system and used the Flower-Nordheim equation to analyze the data. Than we can get the field enhancement factor β and field emission turn-on voltage Vto. We focused on the relationship between the field enhancement factor β、turn-on voltage Vto and the geometric condition of our field emission samples.

After measured these samples successfully, the tips of these samples can be divided into two types:”closed-tipped with tapering end” and “close-tipped with circular end”. Ultimately, we observed the results: There is positive -2 square correlation between field enhancement factor β and radius of carbon nanotubes r .We also obtained the linear correlation between field enhancement factor β and ratio d/r. This d is the distance between the nanotubes tip and its counter-anode. The relationship follows the linear equation : β =β0 .At the state of similar geometry conditions, the β0 of ”closed-tipped with tapering end” is 1.02; the β0 of “close-tipped with circular end” is 33.34.

量測成功的樣品分成閉口尖端型和閉口圓弧型討論。可以得到場增強因子β和奈米碳管發射端半徑r呈-2次方正比關係;場增強因子β,與奈米碳管發射端到陽極距離和半徑的比值d/r呈現良好的線性正比關係,且可以表示成 。且外在幾何條件相近的形況下,閉口尖端型的β0 = 1.02,閉口圓弧型β0 = 33.34。
其他識別: U0005-0202200914554400
Appears in Collections:物理學系所

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