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Surface controlled synthesis of MFe2O4 (M = Mn, Fe, Co, Ni and Zn) nanoparticles and their magnetic characteristics

DSpace at IIT Bombay

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Title Surface controlled synthesis of MFe2O4 (M = Mn, Fe, Co, Ni and Zn) nanoparticles and their magnetic characteristics
 
Creator MOHAPATRA, J
MITRA, A
BAHADUR, D
ASLAM, M
 
Subject SPINEL FERRITE NANOPARTICLES
SIZE-CONTROLLED SYNTHESIS
IRON-OXIDE NANOPARTICLES
SUPERPARAMAGNETIC PROPERTIES
GOLD NANOPARTICLES
FACILE SYNTHESIS
COBALT FERRITE
NANOCRYSTALS
FUNCTIONALIZATION
OLEYLAMINE
 
Description Engineered magnetic nanoparticles, MFe2O4 (where M = Mn, Fe, Co, Ni and Zn), of mean size 2-16 nm (standard deviation sigma Fe > Co > Ni > Zn. This trend is better understood in terms of a cationic distribution of varying magnetic moments in these spinel oxides. For all the ferrites, the magnetization saturates to the bulk value at sizes >= 12 nm, indicating strict control over the dead layer thickness. The effect of surface coordination on the magnetic properties of the ferrite nanoparticles is analyzed. In contrast to trioctylphosphine oxide (TOPO) and oleic acid (OA) functionalized nanoparticles the saturation magnetization of amine protected nanoparticles is higher, which suggests a strong coupling of amine molecules to cations at the particle interface.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2014-10-15T15:27:25Z
2014-10-15T15:27:25Z
2013
 
Type Article
 
Identifier CRYSTENGCOMM, 15(3)524-532
http://dx.doi.org/10.1039/c2ce25957e
http://dspace.library.iitb.ac.in/jspui/handle/100/15151
 
Language en