SYNTHESIS OF A Fe3O4/PAA-BASED MAGNETIC FLUID FOR FARADAY-ROTATION MEASUREMENTS


Kucukdermenci S., Kutluay D., AVGIN İ.

MATERIALI IN TEHNOLOGIJE, cilt.47, ss.71-78, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 47 Konu: 1
  • Basım Tarihi: 2013
  • Dergi Adı: MATERIALI IN TEHNOLOGIJE
  • Sayfa Sayıları: ss.71-78

Özet

Highly water-soluble Fe3O4/PAA (polyacrylic acid) nanoparticles (NPs) were synthesized with the high-temperature hydrolysis method. We report the first demonstration of Faraday rotation (FR) for a magnetic fluid (MF) synthesized with this novel method. The experiments were performed in the DC regime (0-6 . 10(-2) T) at room temperature for 14 concentrations from 1.8 mg/ml to 5 mg/ml. The maximum rotation was recorded as 0.96 degrees cm(-1) for 3.33 mg/ml and this is called the critical concentration (C-CRITICAL). It was found that the rotation tends to decrease when the concentration is higher than C-CRITICAL. The MF behavior for FR is discussed with respect to substructure interactions (particle-particle, chain-chain). This work provides a new insight for the FR investigations of MFs including highly water-soluble magnetic NPs.