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Low-temperature synthesis and characterization of PVP-capped FeAu nanoparticles

Published online by Cambridge University Press:  23 June 2011

HongLing Liu ,
Peng Hou  and
JunHua Wu
HongLing Liu
Affiliation:
Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
Peng Hou
Affiliation:
Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
JunHua Wu*
Affiliation:
Pioneer Research Center for Biomedical Nanocrystals, Korea University, Seoul 136-713, Korea
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

We report the low-temperature synthesis and characterization of polyvinylpyrrolidone (PVP)-capped FeAu magneto-plasmonic multifunctional nanoparticles by a one-step nanoemulsion process. The Fourier transform infrared spectroscopy study proves the PVP coating on the surface of the resultant FeAu nanoparticles, whereas the structural, magnetic, and optical analysis illustrates the fusion of iron and gold into one single nanostructure showing the nanoparticle shape and a tight size distribution with an average size of 11.3 nm, followed by the growth habit compared to other relevant nanoparticles. Moreover, the PVP-capped FeAu nanoparticles manifest soft ferromagnetic behavior with a small coercivity of ∼40 Oe at room temperature. The corresponding magnetic hysteresis curves were elucidated by modified bi-phase Langevin equations, which were reasonably interpreted with the binary particle size distribution. The nanoparticles reveal a well-defined surface plasmon resonance band at ∼546 nm and a visual demonstration shows the magnetic separability of all nanoparticles for potential magnetic and/or optical manipulation.

Keywords

NanostructureFeAu
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 16 , 28 August 2011 , pp. 2040 - 2049
Copyright
Copyright © Materials Research Society 2011

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