TAILIEUCHUNG - Magnetic Property and GMI Effect of MFE2O4 Nanoparticles
In the present article, we report the biosensor can detect superparamagnetic nanoparticles (less than 10 nm in size) at various and low particle concentrations, which is of the importance role in biosensing applications. The nanoparticle ferrite (Fe3O4), Cobalt ferrite (CoFe2O4), Nickel ferrite (NiFe2O4) nanoparticles were synthesized by the high temperature thermal decomposition precursor method. | VNU Journal of Science: Mathematics – Physics, Vol. 33, No. 2 (2017) 10-15 Magnetic Property and GMI Effect of MFE2O4 Nanoparticles Dao Son Lam, Ngo Thu Huong* Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Hanoi, Vietnam Received 20 March 2017 Revised 25 April 2017; Accepted 20 June 2017 Abstract: In the present article, we report the biosensor can detect superparamagnetic nanoparticles (less than 10 nm in size) at various and low particle concentrations, which is of the importance role in biosensing applications. The nanoparticle ferrite (Fe3O4), Cobalt ferrite (CoFe2O4), Nickel ferrite (NiFe2O4) nanoparticles were synthesized by the high temperature thermal decomposition precursor method. The saturation of magnetization have significantly increased as the 12 1nm Fe3O4 (40 emu/g), 6 NiFe2O4 (57 emu/g) and 7 CoFe2O4 ( emu/g) nanoparticles. The saturation magnetization of CoFe2O4 nanoparticle is larger than NiFe2O4, Fe3O4 nanoparticle. The sensitivity of biosensor depend on saturation magnetization of nano particles, thus we have performed a systematic study of the longitudinally excited magneto-inductance effect of an inductive coil with CoFe2O4 nanoparticles is in its core. Our results show that the ([ X/X]) ratios and field sensitivity increase. These results are of practical importance in designing novel magnetic sensors based on the LEMI effect for sensing applications. Keywords: Paramagnetic, magneto-reactance (MX), magneto-inductance effect. 1. Introduction Super paramagnetic nanoparticles are very interesting materials due to their applications in magnetic resonance imaging (MRI), tissue repairing, detoxification of biological fluids, hyperthermia, drug delivery etc. Super magnetic MFe2O4 nanoparticles were recently made by a high-temperature reduction, decomposition reaction of metal acetylacetonate [1, 2]. Recent attention has been drawn to a new class of highly sensitive magnetic sensor based on the giant .
đang nạp các trang xem trước
