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Synthesis, magnetic...
Synthesis, magnetic and optical properties of core/shell Co(1-x)Zn(x)Fe(2)O(4)/SiO(2) nanoparticles
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Girgis, Emad (författare)
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Wahsh, Mohamed M. S. (författare)
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Othman, Atef G. M. (författare)
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visa fler...
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- Bhandu, Lokeshwar (författare)
- KTH,Materialvetenskap
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- Rao, K. Venkat (författare)
- KTH,Teknisk materialfysik
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(creator_code:org_t)
- 2011
- 2011
- Engelska.
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Ingår i: Nanoscale Research Letters. - 1931-7573 .- 1556-276X. ; 6, s. 460-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Nyckelord
- nanostructures
- oxides
- cobalt ferrite
- cobalt zinc ferrite
- zinc ferrite
- magnetic properties
- diffuse reflectance
- Materials science
- Teknisk materialvetenskap
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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