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National Chung Hsing University Institutional Repository - NCHUIR > 理學院 > 物理學系所 > 依資料類型分類 > 碩博士論文 >  超導體Y3Ba5Cu8O18奈米線的製備及物理性質的研究

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/153123

標題: 超導體Y3Ba5Cu8O18奈米線的製備及物理性質的研究
The synthesis and characterization of Y3Ba5Cu8O18 nanowirs
作者: 施建州
shih, chien-chou
Contributors: 藍明德
Ming-Der Lan
物理學系所
關鍵字: 奈米線;溶膠凝膠;Y3Ba5Cu8O18
nanowirs;sol-gel;Y3Ba5Cu8O18
日期: 2012
Issue Date: 2013-11-18 13:45:00 (UTC+8)
Publisher: 物理學系所
摘要: 我們以陽極氧化鋁奈米孔洞薄膜(AAO)作為生長奈米線的基板,製備過程中利用不同的電解液或電壓等參數可控制奈米孔洞的大小,配合溶膠凝膠法可製備出不同尺度的Y3Ba5Cu8O18-δ高溫超導奈米線。將薄膜外側的粉末以X-ray繞射研究樣品晶格結構,估算a軸為3.88A、b軸為3.81A、c軸為31.24A,並利用掃描式電子顯微鏡(SEM)拍攝表面形貌,之後藉由能量分散光譜(EDX)確認Y3Ba5Cu8O18-δ奈米線的元素成分無誤,再以場發射電子顯微鏡(FESEM)觀察奈米線在陽極氧化鋁奈米孔洞薄膜中的型態。最後利用超導量子干涉磁量儀(SQUID)量測Y3Ba5Cu8O18-δ奈米線的超導轉變溫度,比較塊材與不同尺度奈米線的超導轉變溫度,並推算出樣品相干長度4.7×〖10〗^(-9)m。
We use AAO as a substrate of the growth of nanowires, and during the preparation, by using a different electrolyte, voltage and other parameters, we are able to control the size of the nanopores. In coordination with the sol-gel method we can prepare different scales of the Y3Ba5Cu8O18-δ, high-temperature superconducting nanowires. Use X-ray diffraction to study sample lattice structure of the powder on the outside of the film and we can estimate the a-axis, b-axis, and c-axis. Simultaneously we can use a SEM to shoot the surface morphology, followed by an EDX to confirm the elemental composition of the Y3Ba5Cu8O18-δ nanowire is correct, then a FESEM to observe the types of nanowires in the AAO film. Finally, using the SQUID measurement to measure the Y3Ba5Cu8O18-δ nanowire superconducting transition temperature, and compare the bulk with different scale nanowire superconducting transition temperature to calculate the sample coherence length m.
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