Nanoscale assembly of amine-functionalized colloidal iron oxide

K. C. Barick, M. Aslam, Pottumarthi V. Prasad, Vinayak P. Dravid*, Dhirendra Bahadur

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

We demonstrate a single-step facile approach for highly water-stable assembly of amine-functionalized Fe3O4 nanoparticles using thermal decomposition of Fe-chloride precursors in ethylene glycol medium in the presence of ethylenediamine. The average size of nanoassemblies is 40±1 nm, wherein the individual nanoparticles are about 6 nm. Amine-functionalized properties are evident from Fourier transform infrared spectrometer (FTIR), thermal and elemental analyses. The saturation magnetization and spin-echo r2 of the nanoassemblies were measured to be 64.3 emu/g and 314.6 mM-1 s-1, respectively. The higher value of relaxivity ratio (r2/r1=143) indicates that nanoassemblies are a promising high-efficiency T2 contrast agent platform.

Original languageEnglish (US)
Pages (from-to)1529-1532
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume321
Issue number10
DOIs
StatePublished - May 1 2009

Keywords

  • Iron oxide
  • MR contrast agent
  • Nanoassembly
  • Nanoparticle
  • Surface functionalization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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