Stability Investigation of Colloidal FePt Nanoparticle Systems by Spectrophotometer Analysis

被引：24

作者：

Farahmandjou, M. ^{[1
]}

Sebt, S. A. ^{[1
]}

Parhizgar, S. S. ^{[1
]}

Aberomand, P. ^{[1
]}

Akhavan, M. ^{[2
]}

机构：

[1] Islamic Azad Univ, Phys Res Ctr, Sci & Res Branch, Tehran, Iran

[2] Sharif Univ Technol, Dept Phys, MRL, Tehran, Iran

来源：

CHINESE PHYSICS LETTERS | 2009年 / 26卷 / 02期

关键词：

D O I：

10.1088/0256-307X/26/2/027501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

FePt magnetic nanoparticle systems are an excellent candidate for ultrahigh-density magnetic recording. Monodisperse FePt nanoparticles are synthesized by superhydride reduction of FeCl2 center dot 4H(2)O and Pt(acac)(2) at 263 degrees C under N-2 atmosphere. Transmission electron microscopy (TEM) images show monosize FePt nanoparticles with diameter of 4 nm and a standard deviation of about 10%. The average distance between monodispesre particles is nearly 3 nm, and oleic acid and oleylamine surround the nanoparticles as surfactants. Stability investigation of nanoparticle colloidal solution is done via spectrophotometery analysis. The results for FePt nanoparticles dispersed in hexane indicate that adding surfactants with concentration of 3 x 10(-3) part by volume for centrifugation stage increases the stability of FePt nanoparticles solution with concentration of 16 mg/mL, about 67%.

引用

页数：3

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