二氧化鈦披覆奈米碳管材料之場發射特性研究

Study the field emission properties of Titania coated carbon nanotubes

黃檠裕(Ching-yu Huang)

指導教授 ： 林鴻明

大同大學/工程學院/材料工程學系所/碩士(2006年)

摘要

在本研究中，利用不同的酸洗時間對奈米碳管進行純化，其純化之目的在於去除奈米碳管中的金屬觸媒與雜質，並經由熱重分析儀(TGA)來判別純化效果。結果顯示，進行1, 3, 6 小時的純化皆可幾乎去除奈米碳管中的金屬觸媒。
研究初期以二氧化鈦披覆於純化處理6小時的奈米碳管，並且控制前驅物使得呈現兩種不同的厚度，再與商用黏結劑混合調製成奈米碳管漿料。將此漿料用旋轉塗佈的方式固定在ITO玻璃上，再經過燒結的過程後進行場效特性的量測。但由於其場效特性有限，因此，再利用工業用膠布(tape)和電漿(plasma)進行後處理。實驗結果顯示，利用工業膠布後處理後有得到較好的場效特性，而且二氧化鈦厚度薄的，其場效特性優於厚度厚的。就電流的穩定性來看，厚度厚的優於厚度薄的。

關鍵字

場發射 ； 奈米碳管 ； 二氧化鈦

並列摘要

In this study, the purpose is to remove the metal catalysts of purifying the CNTs with different times. The kind of metal catalysts are usually Fe, Co, or Ni. After purifying, we used the thermogravimetry analyzer (TGA) to differentiate between good and bad. The results display almost all metal catalysts of CNTs can remove with purifying 1, 3, and 6 hours.
The purpose of this research is coating titanium on CNTs and two kinds of thickness. Then fabricate CNTs paste with mixing commercial binder. The CNTs paste is fixed on the ITO glass by spinning coating and measure the field emission properties. But the field emission properties have limited so we proceed with post-treatment by industrial tape and CF4 plasma. The result is had tape treatment better field emission property than without. And the field emission property of film is better than thick. Beside, the stability measurement result shows the thick is better than film.

並列關鍵字

field emission ； Carbon nanotubes ； Titania

參考文獻

[2] Valentin N. Popov, “Carbon nanotubes: properties and application”, Materials Science and Engineering R 43 (2004) 61–102.

frequency vibrational modes of long carbon tubules”, Z. Phys. D 27 (1993) 93–96.

[4] A.G. Rinzler, J.H. Hafner, P. Nikolaev, L. Lou, S.G. Kim, D. Tomanek, P. Nordlander, D.T. Colbert, R.E. Smalley, “Unraveling nanotubes: field emission from an atomic wire”, Science 269 (1995) 1550.

[5] G. Che, B.B. Lakshmi, E.R. Fisher, C.R. Martin, “Carbon nanotubule menbranes for electrochemical energy storage and production”, Nature 393 (1998) 346.

[6] A.C. Dillon, K.M. Jones, T.A. Bekkendahl, C.H. Kiang, D.S. Bethune, M.J. Heben, “Storage of hydrogen in single walled carbon nanotubes”, Nature 386 (1997) 377.