有機相製備多晶氧化亞銅奈米物質及其成長機制之研究

Preparation and Characterization of Polycrystalline Cuprous Oxide Nanowires via Polyol Synthesis

羅康榮(Kang-Jung Lo)

指導教授 ： 張哲政

共同指導教授 ： 薛景中(Jing-Jong Shyue)

國立臺灣大學/理學院/化學研究所/碩士(2009年)

https://doi.org/10.6342/NTU.2009.02549

摘要

本研究目的在於以有機相溶液合成法製備多晶氧化亞銅的奈米結構。首先，以溶解於乙二醇中的氯化銅(I)作為前驅物，後與聚乙烯吡咯烷酮(PVP)混合，接著升溫至攝氏150度並維持一段特定時間。以此法得到之奈米線利用穿透式電子顯微鏡(TEM)、掃描式電子顯微鏡(SEM)、原子力顯微鏡(AFM)及電子能譜儀(XPS)等儀器確定其化學組成及外觀特性。選區電子繞射(SAED)的結果說明這些奈米線是多晶的氧化亞銅。將反應時間拉長，奈米線表面漸趨平滑。實驗中，可改變之參數包含溫度、不同陰離子的前驅物、PVP的選用和結構導引效應。本論文探討這些影響多晶奈米線形成結果的因素，最後歸納出這套解釋一元奈米結構單方向性成長的可信機制。

關鍵字

奈米線 ； 銅 ； 多晶 ； 乙二醇 ； 成長機制

並列摘要

A simple method was developed to prepare polycrystalline cuprous oxide nanostructures in organic solutions. In this study, CuCl dissolved in ethylene glycol was used as the precursor, which then mixed with polyvinylpyrrolidone (PVP) before raising temperature to 150 oC and maintaining for a designated period of time. Nanowires were formed initially and characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), atomic force microscopy (AFM) and x-ray photoelectron spectrometry (XPS). These nanowires were polycrystalline Cu2O, as determined by selective-area electron diffraction (SAED). With a longer reaction time, the surface of nanowires became smoother. Factors including the temperature, the counter-ion of the precursor, the existence of PVP and the structure directing effect of the solvent that may affect the formation of polycrystalline nanowires are discussed. At last, a plausible mechanism was proposed to explain the anisotropic growth of the 1D nanostructure.

並列關鍵字

nanowire ； copper ； polycrystalline ； ethylene glycol ； growth mechanism

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