Change search
ReferencesLink to record
Permanent link

Direct link
Synthesis, magnetic and optical properties of core/shell Co(1-x)Zn(x)Fe(2)O(4)/SiO(2) nanoparticles
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
Show others and affiliations
2011 (English)In: Nanoscale Research Letters, ISSN 1931-7573, Vol. 6, 460- p.Article in journal (Refereed) Published
Abstract [en]

The optical properties of multi-functionalized cobalt ferrite (CoFe(2)O(4)), cobalt zinc ferrite (Co(0.5)Zn(0.5)Fe(2)O(4)), and zinc ferrite (ZnFe(2)O(4)) nanoparticles have been enhanced by coating them with silica shell using a modified Stober method. The ferrites nanoparticles were prepared by a modified citrate gel technique. These core/shell ferrites nanoparticles have been fired at temperatures: 400 degrees C, 600 degrees C and 800 degrees C, respectively, for 2 h. The composition, phase, and morphology of the prepared core/shell ferrites nanoparticles were determined by X-ray diffraction and transmission electron microscopy, respectively. The diffuse reflectance and magnetic properties of the core/shell ferrites nanoparticles at room temperature were investigated using UV/VIS double-beam spectrophotometer and vibrating sample magnetometer, respectively. It was found that, by increasing the firing temperature from 400 degrees C to 800 degrees C, the average crystallite size of the core/shell ferrites nanoparticles increases. The cobalt ferrite nanoparticles fired at temperature 800 degrees C; show the highest saturation magnetization while the zinc ferrite nanoparticles coated with silica shell shows the highest diffuse reflectance. On the other hand, core/shell zinc ferrite/silica nanoparticles fired at 400 degrees C show a ferromagnetic behavior and high diffuse reflectance when compared with all the uncoated or coated ferrites nanoparticles. These characteristics of core/shell zinc ferrite/silica nanostructures make them promising candidates for magneto-optical nanodevice applications.

Place, publisher, year, edition, pages
2011. Vol. 6, 460- p.
Keyword [en]
nanostructures, oxides, cobalt ferrite, cobalt zinc ferrite, zinc ferrite, magnetic properties, diffuse reflectance
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-38144DOI: 10.1186/1556-276X-6-460ISI: 000293415700002ScopusID: 2-s2.0-84856063498OAI: diva2:436321
QC 20110823Available from: 2011-08-23 Created: 2011-08-22 Last updated: 2011-08-23Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Bhandu, LokeshwarRao, K. Venkat
By organisation
Materials Science and EngineeringEngineering Material Physics
In the same journal
Nanoscale Research Letters
Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 57 hits
ReferencesLink to record
Permanent link

Direct link