奈米碳管 ( Carbon nanotubes, CNTs ) 已經是奈米科技中的一項重要材料，其具有質量輕、高強度、高韌性、可撓曲、高表面積、表面曲度大、高熱導度、導電性特異等特性，除於儲氫材料的應用外，也可用於微電子元件達到小型化與快速化目的、於奈米碳管的場發射顯示器、感測器等等應用。
本論文利用多層催化金屬層合成奈米碳管，合成方法為化學氣相沉積法(Chemical Vapor Deposition)，碳源為乙醇。我們藉由變化多層催化金屬組合、改變成長溫度，以及將觸媒進行退火處理，來研究在不同條件下對奈米碳管成長的變化，並利用掃描式電子顯微鏡(SEM)、穿透式電子顯微鏡(TEM)、及拉曼光譜儀(Raman spectroscopy)針對成長之奈米碳管進行分析
結果顯示，在本實驗的條件下，實驗反應溫度700℃~800℃為最成長奈米碳管最佳溫度，所成長的奈米碳管直徑約10nm~30nm，而Ni觸媒為必要的觸媒，若搭配Al、Au的複合基板可以長出較好的碳管，另外本實驗使用700℃、850℃退火可以成長較細密度高的碳管。

ABSTRACT
Carbon nanotubes has already been one of an important materials in carbon technology. Carbon nanotubes contains characters whish include low mass, high intensity, surface curvature, and tenacity, easy deflection and heat conduction, great surface area, and unique electric conductivity. Not only the application of Hydrogen storage materials, but the application of micro electron components for reaching the purpose of miniaturization and higher efficiency. In addition, it also use for the nanometer nanotube's field launch monitor, the sensory element, and so on.
As the result shows, the best reaction temperature for the carbon nanotubes is 700℃-800℃ under the experiment conditions, which diameter is 10nm-30nm and the Ni catalyst is essential to the experiment. It will build better carbon nanotubes if collocate with the compound foundation plate Al and Au. Besides, the experiment use the temperature 700℃ and 850℃ for annealing that may grow the higher density nanometer nanotube.
In this essay, we use the multi-layered catalysis conductive sea to synthesize nanometer nanotube, the synthetic method is Chemical Vapor Deposition and the carbon source is the ethyl alcohol. By changing multi-layer to facilitate the synthesis of metals, verifying the temperature while it growing ,and annealing catalyst to study the different conditions for the variation of nanometer nanotube during their growing.
We make uses of the methods SEM,TEM, and Raman spectroscopy to analysis the growing carbon nanotubes.

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