臺灣博碩士論文加值系統

經由熱電理論計算結果指出奈米線結構能夠提升熱電元件之熱電轉換效率，若將奈米線之線徑大小縮小至10 nm，則熱電效率指數( ZT ) 可高達6，相當於熱電轉換效率~30%。由於熱電奈米線之高熱電轉換效率的潛力，進而吸引有許多研究群紛紛投入研究。
本研究以鋁薄片與鋁膜作為基材，經由陽極氧化法製備具有週期性規則排列之蜂巢狀多孔結構氧化鋁模板，平均孔徑大小為40-60 nm，厚度2-39 μm。硫化鉛熱電奈米線的製備是將氯化鉛與硫元素溶於DMSO有機溶液作為電解液，再以電化學沈積法於氧化鋁模板之奈米孔道內成長硫化鉛奈米線。經由電子顯微鏡觀察結果顯示硫化鉛熱電奈米線的線徑大小為50 nm，線徑高度超過1 μm。X 光能量散譜儀 ( EDS ) 微區定性與定量分析結果鉛與硫之原子比率相當接近1：1。

Thermoelectric theory has predicted that the efficiency of thermoelectric devices can be increased by thermoelectric figure of merit of 6. The results of theoretical calculation show that nanowire structures have the potential to significantly improve the thermoelectric figure of merit if nanowire diameter can be decreased to 10 nm. Recent work in thermoelectric nanowire has attracted a great deal of research interest because of their potential application in thermoelectric devices.
In this work, we use aluminum foil and aluminum film as substrate to fabricate periodic nanopore arrangement in porous alumina template using an anodic oxidation method. The pore array of the film has a uniform, closely packed honeycomb structure approximately from 40 to 60 nm in diameter and from 2 to 39 μm thickness.
PbS nanowire arrays were grown in highly ordered nanochannel of an alumina template using electrodeposition from a dimethylsulfoxide solution cotaining PbCl2 and elemental sulfur. Electromicroscopy results showed that PbS nanowires with diameters of about 50 nm and lengths up to 1 μm were synthesized. X-ray energy dispersion analysis indicates that the atomic composition of Pb and S is very close to a 1:1 stoichiometry.

致謝 I
中文摘要 II
英文摘要 III
目錄 IV
表目錄 VI
圖目錄 VII
第1章 序論 1
1.1 前言 1
1.2 研究動機與目的 2
第2章 文獻回顧 6
2.1 熱電現象 6
2.1.1 Seebeck 效應 6
2.1.2 Peltier 效應 8
2.2 熱電元件 11
2.3 多孔性結構之氧化鋁模板 14
2.3.1 氧化鋁奈米多孔模板的結構特徵 14
2.3.2 氧化鋁奈米多孔模板的成長機制 16
2.3.3 氧化鋁奈米多孔模板的製備變因 20
2.3.4 氧化鋁奈米多孔模板製備一維奈米結構材料 26
第3章 研究方法 39
3.1 實驗材料與設備 40
3.1.1 基板材料 40
3.1.2 化學藥品 40
3.1.3 陽極處理系統 40
3.1.4 電化學沈積系統 41
3.1.5 RF磁控濺鍍系統 42
3.1.6 熱處理系統 43
3.2 氧化鋁奈米多孔模板的製備 44
3.2.1 鋁薄片陽極處理 44
3.2.2 鋁膜陽極處理 46
3.3 硫化鉛熱電奈米線的製備 48
3.4 分析與鑑定 50
3.4.1 表面與橫截面形貌觀察 50
3.4.2 元素分析 51
第4章 結果與討論 52
4.1 鋁薄片陽極處理研究 52
4.1.1 鋁薄片陽極氧化形成多孔性氧化鋁膜 52
4.1.2 磷酸效應之探討 60
4.1.3 陽極氧化時間與氧化鋁膜成長之關係 60
4.1.4 陽極氧化電壓與奈米孔道大小之關係 61
4.2 鋁膜陽極處理研究 71
4.2.1 鋁膜陽極氧化形成多孔性氧化鋁膜 71
4.2.2 磷酸效應之探討 76
4.2.3 溫度效應之探討 76
4.3硫化鉛熱電奈米線成長研究 80
第5章 結論 86
5.1 鋁薄片陽極處理 86
5.2 鋁膜陽極處理 86
5.3 硫化鉛熱電奈米線的成長 87
第6章 未來展望 88
參考文獻 89

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