Arc-Discharge Synthesis of Iron Encapsulated in Carbon Nanoparticles for Biomedical Applications
Joint Authors
Bertran, Enric
Chaitoglou, S.
Sanaee, M. Reza
Aguiló-Aguayo, N.
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-07-13
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
The objective of the present work is to improve the protection against the oxidation that usually appears in core@shell nanoparticles.
Spherical iron nanoparticles coated with a carbon shell were obtained by a modified arc-discharge reactor, which permits controlling the diameter of the iron core and the carbon shell of the particles.
Oxidized iron nanoparticles involve a loss of the magnetic characteristics and also changes in the chemical properties.
Our nanoparticles show superparamagnetic behavior and high magnetic saturation owing to the high purity α-Fe of core and to the high core sealing, provided by the carbon shell.
A liquid iron precursor was injected in the plasma spot dragged by an inert gas flow.
A fixed arc-discharge current of 40 A was used to secure a stable discharge, and several samples were produced at different conditions.
Transmission electron microscopy indicated an iron core diameter between 5 and 9 nm.
Selected area electron diffraction provided evidences of a highly crystalline and dense iron core.
The magnetic properties were studied up to 5 K temperature using a superconducting quantum interference device.
The results reveal a superparamagnetic behaviour, a narrow size distribution ( σ g = 1.22 ), and an average diameter of 6 nm for nanoparticles having a blocking temperature near 40 K.
American Psychological Association (APA)
Chaitoglou, S.& Sanaee, M. Reza& Aguiló-Aguayo, N.& Bertran, Enric. 2014. Arc-Discharge Synthesis of Iron Encapsulated in Carbon Nanoparticles for Biomedical Applications. Journal of Nanomaterials،Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-1041251
Modern Language Association (MLA)
Chaitoglou, S.…[et al.]. Arc-Discharge Synthesis of Iron Encapsulated in Carbon Nanoparticles for Biomedical Applications. Journal of Nanomaterials No. 2014 (2014), pp.1-8.
https://search.emarefa.net/detail/BIM-1041251
American Medical Association (AMA)
Chaitoglou, S.& Sanaee, M. Reza& Aguiló-Aguayo, N.& Bertran, Enric. Arc-Discharge Synthesis of Iron Encapsulated in Carbon Nanoparticles for Biomedical Applications. Journal of Nanomaterials. 2014. Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-1041251
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1041251