Versatile ferrofluids based on polyethylene glycol coated iron oxide nanoparticles

W. Brullot, N. K. Reddy, J. Wouters, V. K. Valev, B. Goderis, J. Vermant, T. Verbiest

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

Versatile ferrofluids based on polyethylene glycol coated iron oxide nanoparticles were obtained by a facile protocol and thoroughly characterized. Superparamagnetic iron oxide nanoparticles synthesized using a modified forced hydrolysis method were functionalized with polyethylene glycol silane (PEG silane), precipitated and dried. These functionalized particles are dispersable in a range of solvents and concentrations depending on the desired properties. Examples of tunable properties are magnetic behavior, optical and magneto-optical response, thermal features and rheological behavior. As such, PEG silane functionalized particles represent a platform for the development of new materials that have broad applicability in e.g. biomedical, industrial or photonic environments. Magnetic, optical, magneto-optical, thermal and rheological properties of several ferrofluids based on PEG coated particles with different concentrations of particles dispersed in low molecular mass polyethylene glycol were investigated, establishing the applicability of such materials.

Original languageEnglish
Pages (from-to)1919-1925
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume324
Issue number11
DOIs
Publication statusPublished - 1 Jun 2012

Keywords

  • Ferrofluid
  • Magnetite
  • Magneto-optics
  • Polyethylene glycol
  • Rheology

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