表面活性剂对FePt纳米颗粒形貌的影响  

Effect of Surfactants on the Morphology of FePt Nanoparticles

作　　者：杜雪岩[1] 杨洪奎[1] 刘广菊[1] 屠桂朋[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050

出　　处：《材料导报》2012年第8期1-3,10,共4页Materials Reports

基　　金：国家自然科学基金(51061009);兰州理工大学博士基金(SB01200602)

摘　　要：分别以乙酰丙酮铁(Fe(acac)3)和氯铂酸(H2PtCl6.6H2O)作为Fe源和Pt源,乙二醇作为还原剂和溶剂,通过多元醇还原法制备出单分散的FePt纳米颗粒,并研究了表面活性剂油酸油胺和CTAB对FePt纳米颗粒形貌和磁性能的影响。通过X射线衍射仪(XRD)、透射电子显微镜(TEM)和振动样品磁强计(VSM)对纳米颗粒进行表征。结果表明,表面活性剂油酸油胺和CTAB修饰的FePt纳米颗粒均为面心立方(FCC)结构,分散性良好,粒径分布较未使用表面活性剂时变窄;油酸油胺修饰的FePt形貌主要是球形,但是有四方形纳米结构出现;而CTAB修饰的FePt形貌有蠕虫状产生。VSM结果显示其矫顽力都趋近于零,呈现超顺磁性。FePt nanoparticles were prepared via polyol-reduction process, where Fe（acac）3, H2PtC16 · 6H2O and ethylene glycol were used as Fe ions, Pt ions sources, reductant and solvent, respectively. The effects of CTAB and oleic acid-oleylamine on the morphology and magnetic properties of FePt nanoparticles were investigated. The as- prepared FePt nanoparticles were characterized by X-ray diffraction（XRD）, transmission electron microscopy（TEM） and vibrating sample magnetometer（VSM）. The results exhibit that the FePt nanoparticles are of face-centered-cubic （FCC） structure, superparamagnetic behavior and high mono-dispersibility, FePt nanoparticles modified with oleic acid and oleylamine are mainly spherical shapes, but contained cubic structure, while FePt nanoparticles modified with CTAB are worm-like shapes.

关 键 词：FEPT纳米颗粒 多元醇还原 CTAB 油酸油胺 

分 类 号：TB383[一般工业技术—材料科学与工程] TM272[电气工程—电工理论与新技术]