Synthesis of monodispersed fcc and fct FePt/FePd nanoparticles by microwave irradiation
Synthesis of monodispersed fcc and fct FePt/FePd nanoparticles by microwave irradiation
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DOI：
10.1039/b511850f
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发表时间：
2005-01-01
影响因子：
--
通讯作者：
Evans, JSO
中科院分区：
文献类型：
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作者：
Nguyen, HL;Howard, LEM;Evans, JSO
以 Na2Fe(CO)(4) 和 Pt(acac)(2)/Pd(acac) 2 作为主要反应物，采用简单的微波加热方法化学计量控制合成 FePt 和 FePd 纳米颗粒。通过改变溶剂和表面活性剂，微波辅助反应在快速生产单分散 fcc FePt 纳米颗粒金属合金方面显示出显着优势，该合金可以在低温（364 摄氏度）下转化为 fct 相。高压微波反应（封闭系统）导致直接形成 fcc 和 fct 相 FePt 纳米粒子的混合物。材料的室温结构和磁性特性已通过 X 射线衍射、HRTEM 和磁性测量进行了表征。有序化的开始已通过原位高温 X 射线衍射研究进行了研究。
A simple microwave heating method has been used for the stoichiometrically controlled synthesis of FePt and FePd nanoparticles using Na2Fe(CO)(4) and Pt(acac)(2)/Pd( acac) 2 as the main reactants. By varying the solvents and surfactants, the microwave assisted reactions have shown a significant advantage for the rapid production of monodisperse fcc FePt nanoparticle metal alloys which can be converted to the fct phase at low temperatures (364 degrees C). Microwave reactions at high pressure (closed system) have led to the direct formation of a mixture of fcc and fct phase FePt nanoparticles. Room temperature structural and magnetic properties of materials have been characterized by X-ray diffraction, HRTEM and magnetic measurements. The onset of ordering has been investigated by in situ high temperature X-ray diffraction studies.