Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/3788
標題: 奈米碳管/氧化鋅透明複合薄膜之製備及應用於場發射性質之研究
Preparation of CNTs/ZnO trasparent film for application on field emission device
作者: 曾健鴻
Zeng, Chian-Hung
關鍵字: carbon nanotubes
奈米碳管
carbon nanotubes field emission display
spin-coating
transparent cathod
奈米碳管場發射顯示器
旋轉塗佈
透明陰極
出版社: 化學工程學系所
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摘要: 本論文之研究目的為開發新的奈米碳管透明複合薄膜材料,運用簡便的塗佈技術製作場發射顯示器之冷陰極板。先以化學還原法合成奈米級的Ni-Mg金屬觸媒,並以熱化學氣相沉積法(TCVD)成長出多壁奈米碳管。將上述之奈米碳管與氧化鋅配製成CNTs/ZnO複合溶液並以旋轉塗佈法塗佈於ITO上,製作成冷陰極板。 經由實驗結果顯示,奈米碳管經過4小時酸處理條件為最佳化之純化,過久的酸處理時間會造成奈米碳管結構被破壞。由TEM與SEM圖譜可看出過多氧化鋅會包覆碳管使得場發效果降低,塗佈於冷陰極板的氧化鋅濃度為0.2M時其場發射效果最好;而塗佈層數過多會使得光穿透度降低,因此綜合場發效果以及光穿透度,其最佳條件為塗佈5層奈米碳管/氧化鋅薄膜;4小時鹽酸純化奈米碳管之場發射效果最佳;此外,高的煅燒溫度會造成奈米碳管的氧化以及使得PVP顏色變為黑色而影響透光度,因此於煅燒溫度350℃下其場發射效果為最佳;故控制奈米碳管之純化時間、煅燒溫度以及CNTs/ZnO之途佈層數可以獲得最佳化之場發射效果。
The purpose of this study is to prepare a novel trasparent carbon nanotubes thin film with complex material, and utilize a simple coating techonolgy to fabricate cathode of a field-emission display.A nanoscale Ni-Mg bimetal catalyst was prepared by chemical reduction method and was used to grow the mutipule-wall carbon nanotubes(MWCNTs). The prepared MWCNTs/ZnO complexing solution was coated on ITO substrate by spining coating method to manufacture a cathode. According to the experimental results, the optimal acidic treatment of the carbon nanotubes is 4hr, and the extended treatment can destroy the structure of the carbon nanotubes. The field emission has the best efficiency when the concentration of ZnO is reached to 0.2M. The TEM and SEM results show that the higher ZnO concentration will entrap the carbon nanotubes and decrease the performance of field emission. In addition, the light transmittion decrease with increasing the coating layers on ITO substrate. By considering the effects of field emission and light transmission, the optimal coating layers on ITO is 5 layers carbon-nanotubes/ZnO thin film, and the optimal acidic treatement is 4hr for a betters field emission efficiency. In addition, the higher calcinations temperatures cause the oxidation of carbon nanotubes and the changing color of PVP, and decrease the light transmission of the materials. The best calcination temperature has proofed to be 350℃.
URI: http://hdl.handle.net/11455/3788
其他識別: U0005-0207201019411700
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-0207201019411700
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