Biomedical and environmental applications of magnetic nanoparticles
Tiếng Anh
Tóm tắt
This paper presents an overview of syntheses and applications of magnetic nanoparticles
(MNPs) at the Institute of Materials Science, Vietnam Academy of Science and Technology.
Three families of oxide MNPs, magnetite, manganite and spinel ferrite materials, were
prepared in various ways: coprecipitation, sol–gel and high energy mechanical milling. Basic
properties of MNPs were characterized by Vibrating Sample Magnetometer (VSM) and
Physical Properties Measurement Systems (PPMS). As for biomedical application, the aim
was to design a novel multifunctional, nanosized magnetofluorescent water-dispersible
Fe3O4-curcumin conjugate, and its ability to label, target and treat tumor cells was described.
The conjugate possesses a magnetic nano Fe3O4 core, chitosan (CS) or Oleic acid (OL) as an
outer shell and entrapped curcumin (Cur), serving the dual function of naturally
autofluorescent dye as well as antitumor model drug. Fe3O4-Cur conjugate exhibited a high
loading cellular uptake with the help of a macrophage, which was clearly visualized dually by
Fluorescence Microscope and Laser Scanning Confocal Microscope (LSCM), as well as by
magnetization measurement (PPMS). A preliminary magnetic resonance imaging (MRI) study
also showed a clear contrast enhancement by using the conjugate. As for the environmental
aspect, the use of magnetite MNPs for the removal of heavy toxic metals, such as Arsenic (As)
and Lead (Pb), from contaminated water was studied.
Từ khoá
Keywords: magnetic nanoparticles, magnetic heating, hyperthermia, heavy ion removal
Tài liệu tham khảo
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