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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
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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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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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.