Journal
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
Volume 18, Issue 7, Pages 1329-1335Publisher
SOC BRASILEIRA QUIMICA
DOI: 10.1590/S0103-50532007000700006
Keywords
superparamagnetic; magnetic nanoparticles; carboxyl-group; plasmid DNA
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In this work, a method was developed to prepare monodispersed carboxyl-group functionalized magnetic nanoparticles. Nanosized maghemite (y-Fe2O3, 7.0 +/- 1.0 nm) was synthesized using thermal co-precipitation method and subsequently coated with functional groups by one-step suspension copolymerization. The Fourier transform infrared spectroscopy study and thermogravitmetric analyses confirmed the successful functionalization of carboxyl groups on the surface of magnetic nanocrystals. The surface chemistry makes it possible for SPRI (solid phase reversible immobilization)-based DNA purification. Thus the nanoparticles were employed to isolate plasmid DNA from bacterial cell culture and the results demonstrated its applicability in DNA preparation.
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