Enhanced biomedical heat-triggered carriers via nanomagnetism tuning in ferrite-based nanoparticles

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:381

Article

Angelakeris, M.^1,2,3  Li, Zi-An^2,3  Hilgendorff, M.^2,3  Simeonidis, K.¹  Sakellari, D.¹  Filippousi, M.⁴  Tian, H.⁴  Van Tendeloo, G.⁴  Spasova, M.^2,3  Acet, M.^2,3  Farle, M.^2,3 

[1] Aristotle Univ Thessaloniki, Dept Phys, Thessaloniki 54124, Greece

[2] Univ Duisburg Essen, Fak Phys, D-47048 Duisburg, Germany

[3] Univ Duisburg Essen, Ctr Nanointegrat Duisburg Essen CeNIDE, D-47048 Duisburg, Germany

[4] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium

关键词: Magnetic nanoparticles;    Hyperthermia;    Exchange coupling;    Ferrites;   

DOI  :  10.1016/j.jmmm.2014.12.069

来源: Elsevier

【 摘 要 】

Biomedical nanomagnetic carriers are getting a higher impact in therapy and diagnosis schemes while their constraints and prerequisites are more and more successfully confronted. Such particles should possess a well-defined size with minimum agglomeration and they should be synthesized in a facile and reproducible high-yield way together with a controllable response to an applied static or dynamic field tailored for the specific application. Here, we attempt to enhance the heating efficiency in magnetic particle hyperthermia treatment through the proper adjustment of the core-shell morphology in ferrite particles, by controlling exchange and dipolar magnetic interactions at the nanoscale. Thus, core-shell nanoparticles with mutual coupling of magnetically hard (CoFe2O4) and soft (MnFe2O4) components are synthesized with facile synthetic controls resulting in uniform size and shell thickness as evidenced by high resolution transmission electron microscopy imaging, excellent crystallinity and size monodispersity. Such a magnetic coupling enables the fine tuning of magnetic anisotropy and magnetic interactions without sparing the good structural, chemical and colloidal stability. Consequently, the magnetic heating efficiency of CoFe2O4. and MnFe2O4 core-shell nanoparticles is distinctively different horn that of their counterparts, even though all these nanocrystals were synthesized under similar conditions. For better understanding of the AC magnetic hyperthermia response and its correlation with magnetic-origin features we study the effect of the volume ratio of magnetic hard and soft phases in the bimagnetic core-shell nanocrystals. Eventually, such particles may be considered as novel heating carriers that under further biomedical functionalization may become adaptable multifunctional heat-triggered nanoplatforms. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free