鐵鉑磁性奈米粒子之製備與鑑定

Synthesis and Characterization of Magnetic FePt Nanoparticles

洪原振(YUAN-JEN HUNG)

指導教授 ： 吉凱明

國立中正大學/理學院/化學暨生物化學系/碩士(2016年)

摘要

由於奈米材料具有大量的表面積，因此催化活性表現上會有相對優勢，而磁性奈米粒子亦可應用於磁性儲存媒體與醫學診斷技術上，因此近年來受到科學家們的關注。
本篇論文研究以Fe(CO)5作為鐵的前驅物、Pt(acac)2及Pt(hfac)2作為鉑的前驅物，嘗試使用各種界面活性劑及調控各項實驗參數，如前驅物的濃度、界面活性劑的濃度、反應溫度。藉由改變不同種類界面活性劑及反應溫度，成功的製備出8、6、4 nm 三種大小均一、分散性佳的鐵鉑磁性奈米粒子。
利用穿透式電子顯微鏡觀察奈米粒子的形狀及大小，以能量分散光譜儀、X-ray粉末繞射儀、火焰原子吸收光譜，鑑定鐵鉑磁性奈米粒子結構及含量，再利用震動樣品測磁儀檢測鐵鉑磁性奈米粒子中飽和磁化量及矯頑力。

關鍵字:磁性

關鍵字

磁性

並列摘要

Nanomaterials have a lot of atoms on the surface, so they have a relative advantage on the catalytic activity. Magnetic nanoparticles can also be used in magnetic storage media and medical diagnostic technology, it attracts the attention of scientists in recent years.
In this study, we have employed Fe(CO)5, Pt(acac)2 and Pt(hfac)2 as the metallic precursors. By using a variety of surfactants and varying the experimental factors such as the concentrations of precursors, the concentrations of surfactants and the reaction temperature. We have attempted to adjust experimental factors to obtain the FePt nanoparticles, and we successfully prepared three different sizes (8 nm, 6 nm and 4 nm) and well-dispersed FePt magnetic nanoparticles.
The nanoparticles were characterized by transmission electron microscopy (TEM) to observe the morphology. We analyzed the structure and contents of FePt magnetic nanoparticles by energy dispersive X-ray spectroscopy (EDS)、powder X-ray diffraction (XRD) and flame atomic absorption spectroscopy (FAAS). In addition, we measured the saturation magnetization and coercivity by vibration sample magnetpmeter (VSM).

keyword:Magnetic

並列關鍵字

Magnetic

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