This paper describes the synthesis and magnetic properties of multifunctional Fe3 O4 - AuPt core-shell nanoparticles. The Fe3 O4 - AuPt core-shell nanoparticles were synthesized by a one-pot polyol process in two consecutive steps from Fe, Au, and Pt precursors. The structural characterization and property analysis proves the formation of the core-shell nanostructure fusing the multifunctionality in a single entity. The TEM observation shows that the Fe3 O4 -AuPt core-shell nanoparticles are highly crystalline and uniform in size distribution, with an averaged particle size of ̃ 12.5 nm in diameter, whereas the X-ray diffraction patterns provide further substantiation. The surface plasmon resonance arising from the AuPt nano-shell was revealed by UV-vis spectroscopy, while the magnetic measurements by VSM and PPMS demonstrate the well-defined superparamagnetic and/or soft-ferromagnetic behavior of the Fe3 O4 - AuPt core-shell nanoparticles.
Bibliographical noteFunding Information:
This work was supported in part by the National Research Foundation of Korea through the Pioneer Research Center Program funded by the Ministry of Education, Science and Technology (No. M10711160001-08M1116-00110), the Korea Research Foundation Grant (KRF-2004-005-D00057), and by the Seoul R&BD Program (No. 10920).
- Core-shell nanoparticle
- Iron oxide
- Surface plasmon
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering