二氧化鍺奈米結構的合成｜國立清華大學博碩士論文庫

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研究生：	沈盛慶 Mario Simon
論文名稱：	二氧化鍺奈米結構的合成 Synthesis of Germanium Dioxide Nanostructures
指導教授：	蔡哲正 Tsai, Cho-Jen
口試委員:	林居南 Lin, Ju-Nan 俎永熙 Zu, Yong-Xi
學位類別：	碩士 Master
系所名稱：	工學院 - 材料科學工程學系 Materials Science and Engineering
論文出版年：	2012
畢業學年度：	100
語文別：	英文
論文頁數：	43
中文關鍵詞：	二氧化鍺、奈米結構、合成二氧化鍺
外文關鍵詞：	GeO2, nanostructure, synthesis of GeO2
相關次數：	點閱：2 下載：0
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二氧化鍺 (GeO2) 奈米線是藍色發光材料，因此可以當作光電元件的材料。關於二氧化鍺奈米結構的研究，目前比較注重於合成奈米線。
本實驗當中，利用熱蒸鍍方法，合成出不同奈米結構的二氧化鍺。把有鍍或沒有鍍 7.5 奈米金薄膜的鍺基板加熱到700 oC 和TiF4 粉末加熱到800 oC，合成出柱狀的二氧化鍺。降低有鍍7.5 奈米金薄膜的鍺基板溫度到 600 oC，TiF4粉末固定在800 oC，合成出樹枝結構的二氧化鍺。只要把有鍍上7.5 奈米金薄膜的鍺基板加熱到650 oC，合成出線狀的二氧化鍺。
這三種奈米結構的形貌、結晶性、晶體結構、和成分，可以利用掃描式電子顯微鏡(SEM)、X-光繞射分析儀(XRD)、和穿透式電子顯微鏡(TEM) 來鑑定。

Germanium dioxide (GeO2) nanowire is a blue luminescent material which can be used as optical nanodevices materials. Hence, researches about GeO2 nanostructures are more focused on the synthesis process of GeO2 nanowires.
In this experiment, using thermal evaporation method, GeO2 with different nanostructures has been successfully synthesized. Rods-structured GeO2 are synthesized by heating the germanium substrate with or without 7.5 nm Au film depositions at 700 oC and TiF4 powder at 800 oC. Net-structured GeO2 are synthesized by decreasing the heating temperature of germanium substrate that coated with 7.5 nm Au thin film to 600 oC and TiF4 powder at 800 oC. Wire-structured GeO2 are successfully synthesized by heating germanium substrate coated with 7.5 nm Au thin film at 650 oC heating temperature.
Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD) and Transmission Electron Microscope (TEM) are used to characterize the morphology, crystallinity, crystal structure, and composition of the three types of nanostructure that have successfully been synthesized.

Contents
摘要 ………………………………………………………………………………I
Abstract ………………………………………………………………………II
Acknowledgement ……………………………………………………………III
Contents ………………………………………………………………………IV
List of Figures ……………………………………………………………VI
List of Tables…………………………………………………………… IX
Chapter 1. Introduction ………………………………………………1
1.1 Research of Germanium Dioxide ………………………………1
1.2 Germanium Dioxide Crystal Structure………………………1
1.3 Thermal Evaporation ……………………………………………3
1.4 Laser Ablation ……………………………………………………3
1.5 Thermal Oxidation ………………………………………………3
1.6 Carbothermal Reduction ………………………………………4
1.7 Electrospinning …………………………………………………4
1.8 Facile Hydrothermal ……………………………………………5
1.9 Technique Comparison …………………………………………5
1.10 Motivation ………………………………………………………6
Chapter 2. Experiment Procedure ………………………………8
2.1 Flow Chart ………………………………………………………………………………8
2.2 Substrate Cleaning ……………………………………………9
2.3 Au Deposition ……………………………………………………9
2.4 Thermal Process …………………………………………………9
2.5 Analysis Tools……………………………………………………10
2.5.1 Scanning Electron Microscope (SEM) …………………10
2.5.2 X-ray Diffraction (XRD) …………………………………11
2.5.3 Transmission Electron Microscope (TEM) …………11
2.6 Preparation of Samples for TEM Observation ………11
Chapter 3. Result and Discussion ……………………………12
3.1 Synthesis of GeO2 Nanorods ………………………………12 
3.1.1 Synthesis Process and Charactherization of GeO2 Nanorods ………………………………………………………………12
3.1.2 Issues of TiF4 Powder and Au Thin Film in 
Synthesis Process of GeO2 Nanorods ………………………20
3.1.3 Effects of Substrate Temperature Changes ……22
3.2 Synthesis of GeO2 Nanonets ……………………………25
3.2.1 Synthesis Process and Charactherization of GeO2 Nanonets ……………………………………………………………25
3.2.2 Issues of TiF4 Powder and Au Thin Film in Synthesis Process of GeO2 Nanonets ……………………………………31
3.3 Synthesis of GeO2 Nanowires …………………………33
3.3.1 Synthesis Process and Charactherization of GeO2 Nanowires ……………………………………………………………33
3.3.2 Issue of Au deposition in Synthesis Process of GeO2 Nanowires ……………………………………………………………38
Chapter 4. Summary and Conclusion ………………………40
References …………………………………………………………42








                                

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