Preparation and characterization of ni-nitrilotriacetic acid bearing Poly(Methacrylic acid) coated superparamagnetic magnetite nanoparticles

Date

2008-02-01

Author

TURAL, Bilsen
KAYA, Murat
Özkan, Necati
Volkan, Mürvet

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Stable superparamagnetic magnetite (Fe3O4) nanoparticles were synthesized via co-precipitation in the presence of poly(methacrylic acid) (PMAA) in aqueous solution. The polymer coated Fe3O4 nanoparticles were characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction, thermal analysis, and vibrating sample magnetometry (VSM) techniques. These measurements reveal the presence of magnetite nanoparticles with a size of approximately 8 nm inside the PMAA matrix. The magnetization value of these superparamagnetic nanoparticles at room temperarure and 7 T was measured as about 40 emu/g. PMAA-coated Fe3O4 nanoparticles were further assembled with Ni-chelate through a reaction between a primary amine-bearing NTA (nitrilotriacetic acid) ligand and carboxy-functional groups of PMAA. NTA-PMAA-coated magnetite nanoparticles were then loaded with nickel ions and characterized using FTIR. The average amount of binded Ni on the surface of the NTA-modified PMAA coated Fe3O4 was calculated as 1.65 +/- 0.3 x 10(-6) mol nickel(II) ions per g of the magnetic particles from the inductively coupled plasma optical emission spectroscopy (ICP-OES) measurements.

Subject Keywords

Magnetite, Superparamagnetic, Nanoparticles, Surface modification, Immobilization, PMAA coating, Metal chelator, Ni-NTA

URI

https://hdl.handle.net/11511/30053

Journal

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY

DOI

https://doi.org/10.1166/jnn.2008.b270

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

B. TURAL, M. KAYA, N. Özkan, and M. Volkan, “Preparation and characterization of ni-nitrilotriacetic acid bearing Poly(Methacrylic acid) coated superparamagnetic magnetite nanoparticles,” JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, pp. 695–701, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30053.