期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 46, 期 6, 页码 3646-3653出版社
SPRINGER
DOI: 10.1007/s11664-017-5421-0
关键词
Ultrasound; bifunctional nanoparticles; core-shell; saturation magnetization
资金
- Project 911-Vietnam education fellowship
- Korea Research Foundation (NRF) - South Korean government (MOE) [2015R1D1A3A01020686]
- National Research Foundation of Korea [22A20151213031, 2015R1D1A3A01020686] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Bifunctional magnetic-plasmonic nanoparticles (NPs)-Fe3O4@SiO2-Ag were successfully synthesized by an ultrasound assisted chemical method. Silver ions were absorbed and then reduced by sodium borohydride on the surface of 3-aminopropyltriethoxysilane (APTES) functionalized silica-coated magnetic NPs, then they were reduced under the influence of a 200 W ultrasonic wave for 60 min. When the amount of precursor silver ions increased, the relative intensity of diffraction peaks of silver crystals in all samples increased with the atomic ratio of silver/iron increasing from 0.208 to 0.455 and saturation magnetization (M (s)) decreasing from 44.68 emu/g to 34.74 emu/g. The NPs have superparamagnetic properties and strong surface plasmon absorption at 420 nm, which make these particles promising for biomedical applications.
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