常壓下以電暈方式製備奈米碳管或奈米結構

Producing Carbon Nanotubes or Nanostructures by Corona Discharge at Atmosphere

張雅筑(Ya Zhang)

指導教授 ： 徐文光

國立清華大學/工學院/材料科學工程學系/碩士(2007年)

https://doi.org/10.6843/NTHU.2007.00310

摘要

一般奈米碳管的製備大多使用的方法為碳氫化合物的熱裂解、石墨電弧放電法、雷射蒸發法和化學氣相沉積法。上述幾種方法皆需要一個真空腔體，相對的實驗成本也較高、製程較複雜。本實驗使用特斯拉棒，在自然界環境中實驗(常壓下)，不需要爐管或真空腔體，並且比較了許多不同的實驗方法和條件，成功的找到在鋁片上滴上五環鐵(ferrocene)的甲苯溶液，以特斯拉棒電擊20秒左右，在掃描式電子顯微鏡(SEM)下發現有奈米碳管產生，只是產量非常地少。經過一連串檢討改進後，發現在鋅片上滴上五環鐵的甲苯溶液，通入氬氣，透過筆心以特斯拉棒電擊數十秒，在SEM下亦發現碳管，並且透過拉曼光譜、質譜儀和穿透式電子顯微鏡等儀器的檢驗，成功地解釋奈米碳管的成長機制與發現為何本實驗碳管產量不高的原因。

關鍵字

奈米碳管 ； 電暈 ； 常壓

並列摘要

The common methods of producing carbon nanotubes are pyrolysis of hydrocarbons, arc discharge of graphite, chemical vapor deposition and laser ablation of graphite. The various ways stated above all require a vacuum chamber, and therefore, the cost for experiments is presumedly higher and the process much complicated. We use a Tesla coil for our experiments at atmosphere instead of a vacuum chamber. Comparing with many different ways and conditions, we successfully pulled off a experiment by way of dropping some ferrocene toluene solution on a small slice of aluminum and arcing it about twenty seconds. We find carbon nanotubes under the scanning electron microscope, only that the production is relatively small. Though a lot of discussions and improvements, we drop some ferrocene toluene solution on a small slice of zinc and arc it by a pencil lead about twenty seconds in argon atmosphere. We also find carbon nanotubes under the scanning electron microscope. Through Raman spectrum, mass spectrum and high resolution transmission electron microscope, we can explain the growth mechanism of carbon nanotubes and our poor producing.