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研究生： 陳家宇
Chen, Chia Yu
論文名稱： Synthesis and characterization of copper telluride nanostructures
碲化銅奈米結構物合成與鑑定
指導教授： 段興宇
Tuan, Hsing-Yu
口試委員: 黃暄益
曾院介
學位類別： 碩士
Master
系所名稱： 工學院 - 化學工程學系
Department of Chemical Engineering
論文出版年： 2011
畢業學年度： 99
語文別： 中文
論文頁數： 62
中文關鍵詞： 碲化銅 、奈米
相關次數： 點閱：2  下載：0 
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    • 我們經由有機熱溶劑合成碲化銅奈米粒子，並由熱注射法將奈米粒子成核與生長的過程分開，探討反應溫度、界面活性劑、前驅物改變對碲化銅奈米粒子的影響。藉由改變這些變因，我們可以合成粒徑8.3奈米、均一分散的碲化銅奈米粒子及表面較為粗糙的奈米管，並由XRD、SAED分析其晶體結構，TEM分析形狀、晶格，ICP分析元素成份，並進行晶格模擬確認為碲化銅奈米粒子。進一步分析其光學、電學等物性，在光學方面，碲化銅奈米粒子會隨著銅空缺使自由載子濃度增高，在近紅外光區出現表面電漿共振，並計算其莫耳消光系數；在電性方面，碲化銅奈米粒子也因為自由載子濃度較高，使電阻變小。在碲化銅奈米管方面，我們藉由分析不同反應時間的產物，來確認碲化銅奈米管的生長機制。

    Cu2-xTe nanoparticles with narrow size distribution and nanotubes have been successfully synthesized by varying reaction conditions under thermal decomposition method. X-ray powder diffraction (XRD) spectra were recorded to verify the structure of as-prepared nanocrystals. The morphologies of the nanocrystals were observed under scanning electron microscopy (SEM). Inductively coupled plasma atomic emission spectroscopy(ICP-AES) were analysed to confirm the composition of the Cu2-x nanoparticles which is Cu1.76Te. High-resolution transmission electron microscopy (HRTEM) were employed to characterize the crystalline nature and growth direction of the as-obtained products. Experimental results have shown that the reaction temperature and types of surfactant would affect the morphology of the Cu2-xTe nanocrystals. The optical and electricity properties of Cu2-xTe nanoparticle were also investigated, clearly revealed the localized surface plasmon resonances and low electrical resistance. The possible formation mechanism for saw-tooth surface morphology nanotubes was put forward by analyzing the products in different reaction time.

    第一章緒論............................................................................................1 1-1奈米材料..........................................................................................1 1-2奈米粒子於有機溶劑中合成..........................................................3 1-3奈米化合物形狀控制.......................................................................5 1-4碲化銅文獻回顧..............................................................................12 第二章 實驗步驟及分析方法.............................................................17 2-1實驗藥品.........................................................................................17 2-2實驗設計.........................................................................................18 2-3實驗步驟.........................................................................................19 2-4鑑定儀器…….................................................................................20 第三章 結果與討論.............................................................................21 3-1碲化銅奈米粒子反應變因討論.....................................................21 3-2碲化銅奈米粒子結構分析.............................................................28 3-3碲化銅奈米粒子物理性質分析.....................................................36 3-4碲化銅奈米管結構分析.................................................................45 3-5反應時間對碲化銅奈米管影響.....................................................49 3-6碲化銅奈米管反應機制.................................................................51 第四章 結論.........................................................................................57 第五章 參考文獻.................................................................................59

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