Structure of Fe–Pt alloy included carbon nanocapsules synthesized by an electric plasma discharge in an ultrasonic cavitation field of liquid ethanol
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For the first time Fe–Pt alloy included carbon nanocapsules were synthesized by an electric plasma discharge in an ultrasonic cavitation field of liquid ethanol. This contrasts the extensively used chemical synthesis methods which produce uncoated Fe–Pt alloy nanoparticles. We proposed that the as-synthesized Fe–Pt alloy included carbon nanocapsules are potentially useful in biomedical applications. Thereby an aim of this work was to coat the Fe–Pt alloy nanoparticles by graphite shells using plasma discharge in liquid ethanol and to study the structure and magnetic properties of the carbon encapsulated Fe–Pt alloy nanoparticles. The core–shell structured nanoparticles were characterized by transmission electron microscopy and X-ray diffraction. These methods revealed the presence of a disordered face-centered cubic (fcc) structure (γFe, Pt) in the cores of the as-synthesized carbon nanocapsules. The as-synthesized carbon nanocapsules showed the soft magnetic character at room temperature. These carbon nanocapsules may provide a new approach in the transport and delivery of anticancer drugs.
KeywordsPlasma discharge and ultrasonic cavitation Transmission electron microscopy (TEM) Carbon nanocapsules Soft magnets Core-shell nanoparticles
The authors would like to thank Dr. Rie Umetsu for providing the magnetic properties measurements and for valuable discussions. We gratefully acknowledge Mr. Yuichiro Hayasaka for his considerable support in TEM investigations. This work was financially supported by a Grant-in-Aid for Exploratory Research (No. 17656243) and Young Scientists (A) (No. 20686051) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
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