臺灣博碩士論文加值系統

本實驗利用奈米薄膜旋轉方式探究奈米晶粒旋轉及各樣界面形成的原因。以反應式離子濺鍍在NaCl (100)、(110) 、(111) 和(112)的單晶基材上生成氧化鎳和銀磊晶之奈米薄膜，將各樣的薄膜重疊在適當的低溫進行熱處理使得奈米晶粒旋轉至一穩定界面。並利用電子顯微鏡測定其旋轉過程及各穩定界面。在疊膜間發現許多新界面，並分析其晶向關係與結構。奈米晶粒初始以快速之速率旋轉，在接近穩定位置時減緩。其速率隨溫度增加而增加，在200oC以上更快速。

A nanofilm rotation method is developed to study the rotation of nanograins and the formation of various low energy interfaces. Epitaxial NiO and Ag nanofilms are prepared by ion beam sputtering onto the (100), (110), (111) and (112) surfaces of NaCl single crystal. By overlapping of the above films with an angle difference, and annealing at relatively low temperatures the nanograins are induced to rotate till a stable interface is reached. The rotation process and the stable interfaces are determined by transmission electron microscopy. Many new interfaces between mixed planes are found, and their orientation relationships and structures are analyzed. The rotation speed increase with temperature and is fast above 200oC.

Contents…………….…………………………...…………….....………..…………………….….I
List of Figures…..……………………..……………………………….……………..……….......II
List of Table…….……………………..……………………………….……………..…...….......III
Abstract (Chinese)…………………………………………………….…………...……….....…VII
Abstract……………………………………………………………………………….………...VIII
1. Introduction………………...…………..……….….………………………...…..……..............1
1.2. Purpose………...…………..……….…………….………………………...…..……..............3
2. Experimental details…………………………….……………………………..…....…….….…4
2.1. NiO system………………………………………………………………………………...4
2.1.1. NiO-A.………………………………………………...………………………….....4
2.1.2. NiO-B……………………………………...……………………………………......5
2.2. Ag system……………………………………………………………………………….…5
2.1.1. Ag-A.…………………………………………………...……………………….......6
2.1.2. Ag-B…………………………………………………...………………………........6
3. Result and discussions…………………………………………………………………………..6
3.1. Rotation between the same planes...………..……………………………………………..6
3.1.1. Epitaxial NiO films on NaCl surfaces………………………..……………………..6
3.1.2. Epitaxial silver films on NaCl surfaces………………..………..…………………..7
3.1.3. Rotation without NaCl substrate……………..…………...……..…………………..7
3.1.4. Twist boundary of the same crystallographic plane…………….…………………..7
3.1.5. Rotations of the same crystallographic planes………………….…………………..8
3.2. Interfaces of mixed planes…………………………………........….……...…….………..9
3.2.1. NiO/NaCl and Ag/NaCl Interfaces…………........…………………..….…………..9
3.2.2. Twist boundaries………........………………………………………….….……….10
3.2.3. Interfaces between mixed crystallographic planes………………………..…….…10
3.2.4. Tilt boundaries…..…………………………………………….…………..…….…12
5. Conclusions………………….....................................................................................….…......14
References…...………..................................................................................................................16

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