Stability Investigation of Colloidal FePt Nanoparticle Systems by Spectrophotometer Analysis

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2009,（2）
• 页码范围: 248-250
• 页数: 3页
• 语种: 英文

摘要

FePt magnetic nanoparticle systems are an excellent candidate for ultrahigh-density magnetic recording. Monodis-N2 atmosphere. Transmission electron microscopy (TEM) images show monosize FePt nanoparticles with diame-ter 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 surfaetants. Stability investigation of nanopar-tide colloidal solution is done via spectrophotometery analysis. The results for FePt nanoparticles dispersed in hexane indicate that adding surfactants with concentration of 3 × 10-3 part by volume for centrifugation stage increases the stability of FePt nanopartieles solution with concentration of 16 mg/mL, about 67%.