奈米金/鐵線複合材料之合成與性質研究

Synthesis and Characterization of Nano Gold / Iron Wires Composites

黃聖伶(Sheng-Ling Huang)

指導教授 ： 林鴻明

大同大學/工程學院/材料工程學系所/碩士(2010年)

摘要

近年來，奈米金及奈米磁性材料吸引許多生醫領域的研究人員，成為受到注目的先進材料。本研究的目的在結合兩者，進而開發出新型態的奈米金/鐵線複合材料，並且探討其結構、形貌及磁特性。
在外加磁場的作用下，利用化學還原法合成奈米鐵線，再以此鐵線為基底，藉由多元醇法將奈米金顆粒析出於其表面，形成奈米金/鐵線複合材料。本研究合成不同金比例的複合材料，以探討奈米金的作用，並且同時討論熱處理條件對於材料特性的影響。
結果顯示不同熱處理條件形成不同的氧化結構，金鐵複合材料之飽和磁化量，隨著金含量添加越多飽和磁化量而增加; 在相同的金含量下，不同的熱處理方式，形成不同的飽和磁化量，經由H2/Ar熱處理之後5wt%之金/鐵奈米線較熱處理前有較高的飽和磁化量。
利用X光射線繞射法(XRD)做材料的定性分析，鑑定合成之奈米複合材料的結構、由感應耦合電漿(ICP)決定複合材料成份的重量百分比、以場發射掃描式電子顯微鏡(FESEM)觀察複合材料的顯微形貌及奈米金顆粒之尺寸、振動樣品量測儀(VSM)來量測複合材料之飽和磁化量。

關鍵字

鐵 ； 奈米線 ； 金

並列摘要

In recent years, gold nanoparticles and magnetic nanomaterials have already attracted many researchers in biomedical field. The purpose of this study is combining them, and then developed a new type of nano gold/iron nanowires composites. The structures, morphologies and magnetic properties of the synthesized nanocomposites are investigated in this study.
Under external magnetic field, iron nanowires are synthesized by chemical reduction method. Furthermore, the iron nanowires are used as supporter to support gold nanoparticles by polyol process using HAuCl4•3H2O as precursors. Different amounts of gold nanoparticles are deposited on the surfaces of iron nanowires for investigating the influence of added gold. Moreover, various heat treatments of synthesized nanocomposites are also examined.
The results show that the saturated magnetizations of the gold/iron nanowires increase with the added amount of gold. With the same weight ratios of gold, the saturated magnetizations of gold/iron nanowires are changed by different heat treatment, which due to the different oxidation structures. 5 wt.% gold/iron nanowires heated in H2/Ar has higher saturated magnetization than that without heat treatment.
The structures of nanocomposites are analyzed by X-ray diffraction (XRD) pattern. The contents of gold in nanocomposites are examined by Induced couple plasma (ICP). Field emission scanning electron microscope (FESEM) is applied to observe the morphologies, structures, sizes and dispersion of gold on iron nanowires. Vibration sample magnetometer (VSM) is used to investigate magnetic properties of the nanocomposites.
Keywords: gold, iron, nanowires

並列關鍵字

iron ； nanowires ； gold

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