NDLI: Synthesis and characterization of carbon-coated cobalt ferrite nanoparticles

Content Provider	Springer Nature Link
Author	Bakhshi, Hamed Shokuhfar, Ali Vahdati, Nima
Copyright Year	2016
Abstract	Cobalt ferrite nanoparticles (CFNPs) were prepared via a reverse micelle method. The CFNPs were subsequently coated with carbon shells by means of thermal chemical vapor deposition (TCVD). In this process, acetylene gas (C$_{2}$H$_{2}$) was used as a carbon source and the coating was carried out for 1, 2, or 3 h at 750°C. The Ar/C$_{2}$H$_{2}$ ratio was 10:1. Heating during the TCVD process resulted in a NP core size that approached 30 nm; the thickness of the shell was less than 10 nm. The composition, structure, and morphology of the fabricated composites were characterized using X-ray diffraction, simultaneous thermal analysis, transmission electron microscopy, high-resolution transmission electron microscopy, and selected-area diffraction. A vibrating sample magnetometer was used to survey the samples’ magnetic properties. The deposited carbon shell substantially affected the growth and magnetic properties of the CFNPs. Micro-Raman spectroscopy was used to study the carbon coating and revealed that the deposited carbon comprised graphite, multiwalled carbon nanotubes, and diamond- like carbon. With an increase in coating time, the intensity ratio between the amorphous and ordered peaks in the Raman spectra decreased, which indicated an increase in crystallite size.
Starting Page	1104
Ending Page	1111
Page Count	8
File Format	PDF
ISSN	16744799
Journal	International Journal of Minerals, Metallurgy, and Materials
Volume Number	23
Issue Number	9
e-ISSN	1869103X
Language	English
Publisher	University of Science and Technology Beijing
Publisher Date	2016-09-06
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	nanoparticles cobalt ferrite carbon coatings chemical vapor deposition Raman spectroscopy Materials Science Metallic Materials Characterization and Evaluation of Materials Ceramics, Glass, Composites, Natural Methods Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Geochemistry and Petrology Mechanical Engineering

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