一維氧化鋅奈米結構自發性與電場控制成長及其物理機制探討

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Title:	一維氧化鋅奈米結構自發性與電場控制成長及其物理機制探討
Other Titles:	Spontaneous growth mechanism, electric field control and optical properties of 1D ZnO nanostructures
Authors:	許詩涵;Hsu, Shih-han
Contributors:	淡江大學物理學系碩士班葉炳宏;Yeh, Ping-Hung
Keywords:	氧化鋅;Zinc Oxide;奈米線;自發性成長機制;nanowire;Spontaneous growth mechanism
Date:	2011
Issue Date:	2011-12-28 18:06:08 (UTC+8)
Abstract:	氧化鋅奈米元件會操作在不同環境條件，當元件操作於濕度環境、氣體及化學溶劑環境會導致氧化鋅奈米線產生變質.本研究將針對氧化鋅奈米線於濕度環境下的自發成長機制作探討。當氧化鋅奈米結構置於相對濕度在80%±5%時，約18 小時的時間可以觀察到氧化鋅奈米線本體成長出明顯的分枝結構。當相對濕度於70%±5%區間，氧化鋅奈米線無法在18 小時內成長分枝結構，但當時間拉長至20 天時，氧化鋅奈米線本體亦可成長出分枝結構。若相對濕度超過85%，因為奈米線本體表面無法成核，即使經過很長的時間亦無法成長出分枝結構。當水氣和氧化鋅奈米線本體反應時會產生帶負電的水溶液，因此可以利用外加電場控制其生長方向。藉由成長機制的探討，能將氧化鋅奈米線元件操作於不同環境底下，且確保元件不會因為外部環境造成損壞. Zinc oxide nanowires devices will be operated in different environment conditions, the morphology of ZnO NWs will be variant due to the humidity, gas and chemical convictions. This study was focused on the spontaneous growth mechanism of ZnO NWs in different humidity. Around RH80%±5%, the branch ZnO nanostructures were fabricated from the origin ZnO NWs within 18hr. Around RH70%±5%,the branch ZnO NWs did not growth until 20days.When the humidity over RH85%,the branch ZnO were not fabricated even if for long time that’s due to the origin ZnO NWs surface cannot nucleated. The branch ZnO NWs synthesized in room temperature and analyzed by OM、SEM and TEM.By using electric field, the growth direction of the brench ZnO NWs can be controlled. In this research work, the regrowth mechanism can be figured out and the ZnO-based NWs devices can be operated in different environment conditions without degenerating efficiency.
Appears in Collections:	[Graduate Institute & Department of Physics] Thesis

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