臺灣博碩士論文加值系統

本實驗利用外加磁場於水熱法(hydrothermal)製備氧化鋅奈米柱研究上，首先以0.37g硝酸鋅六水合物(Zinc nitrate hexahydrate)做為鋅(Zn)來源與0.175g環六亞甲基四胺(hexamethylenetetramine, HMT)加入去離子水配成50ml溶液於樣品瓶中，並與加熱系統一起放入螺線環空間，此螺線環可產生磁場，最高值可加至1000gauss，利用數位溫控器將成長溫度設定為90℃於Si基板上成長氧化鋅奈米柱。外加磁場影響下分析不同沉積時間、不同磁場大小、不同成長角度以及磁力大小對奈米柱成長之影響。
由SEM、XRD和PL光譜儀分析，可以知道於外加磁場下成長之氧化鋅奈米柱，由於磁場可以抑制水熱法反應溶液之對流，因而可以降低其缺陷值及改善其結晶性。故經由外加改變磁場可以調變氧化鋅奈米柱之結構及發光性質。

In this research, we manufactured ZnO nanorods arrays by hydrothermal synthesis with external magnetic. First, 0.37g Znic nitrate hexahydrate as the source of Zn and 0.175g hexamethylenetetramine were mixed in 50ml DI water in the beaker. Next, the beaker together with a heater were placed inside a solenoid, which can generate a magnetic field up to 1000G. The ZnO nanorods arrays were grown on the Si substrate at 90℃. We investigated the effect of magnetic field on the structural, and optical properties by changing the strength of magnetic field, the nanorod grown direction with respect to magnetic field, and magnetic force.
From SEM, XRD and photoluminescence spectra analysis, we realized that the crystalline structure of ZnO nanorods can be improved due to the fact that magnetic field can damp the convection and therefore reduce the defects form inside ZnO nanorods.

中文摘要----------------------------------------------------------------I
英文摘要---------------------------------------------------------------II
致謝--------------------------------------------------------------------III
總目錄-----------------------------------------------------------------IV
表目錄----------------------------------------------------------------VII
圖目錄---------------------------------------------------------------VIII
第一章 緒論---------------------------------------------------------1
1.1 簡介-------------------------------------------------------------------------------------------1
1.2 文獻回顧-------------------------------------------------------------------------------------2
1.2.1 磁場對液體影響之理論介紹----------------------------------------------------2
1.2.2 水熱法製備氧化鋅奈米柱------------------------------------------------------6
1.3 研究目的與動機----------------------------------------------------------------------------8
第二章 相關理論介紹---------------------------------------------9
2.1 氧化鋅特性簡介----------------------------------------------------------------------------9
2.1.1 氧化鋅的晶體結構---------------------------------------------------------------9
2.1.2 氧化鋅的光學特性-------------------------------------------------------------10
2.1.3 氧化鋅奈米柱應用-------------------------------------------------------------14
2.1.4 氧化鋅奈米線製備方法-------------------------------------------------------15
2.2 水熱法(Hydrothermal)介紹-------------------------------------------------------------17
2.2.1 水熱法發展與演進--------------------------------------------------------------17
2.2.2 一維氧化鋅奈米線成長機制--------------------------------------------------18
第三章 實驗步驟與儀器介紹----------------------------------19
3.1 實驗流程-----------------------------------------------------------------------------------19
3.2 製程與實驗設備--------------------------------------------------------------------------21
3.2.1離子束濺鍍系統(Ion beam sputter, IBS)---------------------------------------21
3.2.2 水熱法製程系統------------------------------------------------------------------22
3.3量測與分析儀器---------------------------------------------------------------------------24
3.3.1 掃描式電子顯微鏡 (Scanning Electron Microscopy, SEM)---------------24
3.3.2 X-ray繞射儀---------------------------------------------------------------------25
3.3.3 光致螢光激發光譜儀(Photoluminescence, PL)------------------------------26
3.3.4 穿透式電子顯微鏡(Transmission electron microscopy, TEM)------------27
第四章 實驗結果與討論-----------------------------------------29
4.1 時間對氧化鋅奈米柱成長特性探討--------------------------------------------------29
4.1.1 SEM形貌分析---------------------------------------------------------------------29
4.1.2 PL光譜分析------------------------------------------------------------------------32
4.2 磁場平行奈米柱生長方向探討--------------------------------------------------------33
4.2.1 SEM形貌分析---------------------------------------------------------------------33
4.2.2 PL光譜分析------------------------------------------------------------------------36
4.2.3 XRD結構分析---------------------------------------------------------------------40
4.2.4 TEM分析---------------------------------------------------------------------------42
4.2.5磁場平行奈米柱生長方向探討之小結----------------------------------------45
4.3 外加磁場下在不同角度成長奈米柱之探討-----------------------------------------46
4.3.1 SEM形貌分析---------------------------------------------------------------------46
4.3.2 PL光譜分析------------------------------------------------------------------------49
4.3.3 XRD結構分析---------------------------------------------------------------------54
4.3.4 TEM分析---------------------------------------------------------------------------55
4.3.5 外加磁場下在不同角度成長奈米柱之探討小結---------------------------57
4.4 磁力對氧化鋅奈米柱成長之探討-----------------------------------------------------58
4.4.1 SEM形貌分析---------------------------------------------------------------------58
4.4.2 PL光譜分析------------------------------------------------------------------------61
4.4.3 XRD結構分析---------------------------------------------------------------------65
4.4.4磁力對氧化鋅奈米柱成長之探討小結----------------------------------------66
第五章 結論--------------------------------------------------------67
附錄---------------------------------------------------------------------68
參考文獻---------------------------------------------------------------76

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