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 01.07.2011   Карта сайта     Language По-русски По-английски
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01.07.2011









Design of carboxylated Fe3O4/poly(styrene-co-acrylic acid) ferrofluids with highly efficient magnetic heating effect


Tai Thien Luonga, Thu Phuong Hab, Lam Dai Tranb, Corresponding Author Contact Information, E-mail The Corresponding Author, Manh Hung Dob, Trang Thu Maib, Nam Hong Phamb, Hoa Bich Thi Phanb, Giang Ha Thi Phamc, Nhung My Thi Hoangc, Quy Thi Nguyenc and Phuc Xuan Nguyenb, Corresponding Author Contact Information, E-mail The Corresponding Author





a Faculty of Chemistry, Hanoi National University of Education, Hanoi, Viet Nam


b Institute of Materials Science, Vietnam Academy of Science and Technology, Hanoi, Viet Nam


c Faculty of Biology, Hanoi University of Science, Vietnam National University, Viet Nam




Received 14 December 2010;


revised 14 February 2011;


accepted 22 February 2011.


Available online 26 March 2011.












Abstract



Magnetic heating effect of Fe3O4 ferrofluids, surface-carboxylated and encapsulated by poly(styrene-acrylic acid) was studied. Magnetic Fe3O4 NPs were synthesized by coprecipitation method and characterized by X-ray diffraction (XRD), Field Emission Electron Microscope (FESEM) and Vibrating Sample Magnetometer (VSM). Spectroscopic data (Infra red (IR) and Proton Nuclear Magnetic Resonance (1H NMR) spectra) confirmed that Fe3O4 NP surface was carboxylated and capable for protein binding (e.g., Hepatitis B surface antibody (HBsAb)). Magnetic measurement by Physical Properties Measurement System (PPMS) and magnetic heating experiments revealed that the saturation temperature of the ferrofluids could be advantageously applied in hyperthermic treatment, namely it could achieve as high as 48.6°–57 °C, with as low as 0.3–0.5 mg/ml of Fe3O4 in the fluid, under magnetic field of 60 Oe and 236 kHz. Under those AC field parameters, the specific loss power (SLP) was measured as 0.84 kW/g and Sarcoma 180 cells were killed after 70–80 min-treatment in ex vivo heating experiment, meaning that the synthesized ferrofluid may be considered as promising in hyperthermic cancer treatments.












Graphical abstract








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  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

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