研究生: |
楊子弦 Zih - Sian Yang |
---|---|
論文名稱: |
二氧化釕/石墨烯之異質奈米結構之製備與特性分析 Growth and characterization of RuO2/graphene heteronanocrystals |
指導教授: |
黃鶯聲
Ying-Sheng Huang |
口試委員: |
何清華
Ching-Hwa Ho 趙良君 L. C. Chao 李奎毅 Kuei-yi LEE 程光蛟 Kwong-Kau Tiong |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2011 |
畢業學年度: | 99 |
語文別: | 中文 |
論文頁數: | 101 |
中文關鍵詞: | 二氧化釕 、石墨烯 、反應式射頻磁控濺鍍法 |
外文關鍵詞: | RuO2, graphene, reactive radio frequency magnetron sputtering |
相關次數: | 點閱:347 下載:4 |
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本論文主要利用反應式射頻磁控濺鍍法製備奈米材料來研究二氧化釕(Ruthenium dioxide,RuO2)/石墨烯(Graphene)奈米複合結構,觀察其表面、分析其成長優選方向及結構特性。
利用反應式射頻磁控濺鍍法沉積二氧化釕奈米結構於藍寶石(sapphire,SA)(100)、(012)、鈮酸鋰(LiNbO3,LNO)(100)、石英玻璃(Fused Silica)與銅網基材之石墨烯薄膜形成奈米複合結構,探討其異質奈米材料形貌、方向等相關特性。由拉曼散射光譜儀(Raman)可檢測石墨烯的層數多寡與呈現紅移現象的二氧化釕振動模式(Eg、A1g 及B2g),並從二氧化釕沉積於石墨烯在銅網基材可得知石墨烯沒有在製備中與氧結合而被破壞;從X光繞射(XRD)得到二氧化釕奈米晶體與石墨烯於藍寶石(100)基板與鈮酸鋰(100)基板上,二氧化釕會以[001]方向優選成長、藍寶石(012)基板上,二氧化釕會以[101]方向優選成長,而在石英玻璃基板上成長方向為I[101]大於I[002]大於I[110];從場發射式電子顯微鏡(FESEM)於藍寶石(100)基板與鈮酸鋰(100)基板可得知二氧化釕奈米晶體在石墨烯上規則排列且垂直成長,而在藍寶石(012)與石英玻璃基板上的二氧化釕是呈現傾斜方向,定性及定量分析部分X光光電子能譜儀(X-ray photoelectron spectroscopy)顯示其元素組成大約為Ru:O為1:2。
我們成功的將二氧化釕奈米結構成長於石墨烯奈米結構上,對於二氧化釕成長在石墨烯上之異質奈米結構的成長特性以及機制更加瞭解。
Ruthenium dioxide nanocrystals (NCs) were deposited on graphene templates to form RuO2/grapheme nanocomposites by reactive radio frequency magnetron sputtering using a Ru metal target. The graphene templates were synthesized on fused silica, sapphire (SA) (100)/(012), LiNbO3 (LNO) (100) and copper screen substrates using floating thermal chemical vapor deposition technique. The surface morphology, structural and spectroscopic properties of the RuO2/graphene nanocomposites were characterized using field-emission scanning electron microscopy (FESEM), Raman spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS).
FESEM micrographs revealed the growth of randomly oriented RuO2 nanocrystals (NCs) on fused silica, vertically aligned RuO2 NCs on SA(100) and LNO(100), and tilted alignment of RuO2 nanorods on SA(012). Raman spectra confirmed the deposition of rutile phase RuO2 on graphene templates. The XRD results indicated that rutile phase RuO2 NCs with random orientation on fused silica with peaks intensity I[101]>I[002]>I[110] , coexistence of (001) and (301) orientation on LNO(100) substrate, and (001) and (101) preferred orientation on SA(100) and SA(012) substrates, respectively. XPS analyses revealed oxygen vs. ruthenium ratio of 2.0 ±0.1 for the as-deposited RuO2 NCs.
We have demonstrated the successful synthesis of RuO2/graphene heteronanostructures on different substrates. A strong substrate effect on the alignment of the RuO2 NCs on graphene templates was observed, and the probable mechanisms for the formation of NC structure were discussed.
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