Record Details

Effects of Shape and Size of Cobalt Ferrite Nanostructures on Their MRI Contrast and Thermal Activation

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Effects of Shape and Size of Cobalt Ferrite Nanostructures on Their MRI Contrast and Thermal Activation
 
Creator JOSHI, HM
LIN, YP
ASLAM, M
PRASAD, PV
SCHULTZ-SIKMA, EA
EDELMAN, R
MEADE, T
DRAVID, VP
 
Subject magnetite nanoparticles
hyperthermia application
oxide nanoparticles
drug-delivery
nanocrystals
fluid
 
Description Cobalt ferrite magnetic nanostructures were synthesized via a high temperature solution phase method. Spherical nanostructures of various sizes were synthesized with the help of seed mediated growth of the nanostructures in the organic phase, while faceted irregular (FI) cobalt ferrite nanostructures were synthesized via the same method but in the presence of a magnetic field. Magnetic properties were characterized by superconducting quantum interference device (SQUID) magnetometry, relaxivity measurements, and thermal activation under RF field, as a function of size and shape. The results show that the saturation magnetization of the nanostructures increases with an increase in size, and the FI nanostructures exhibit lower saturation magnetization than their spherical counterparts. The relaxivity coefficient of cobalt ferrite nanostructures increases with an increase in size, while FI nanostructures show a higher relaxivity coefficient than spherical nanostructures with respect to their saturation magnetization. In the case of RF thermal activation, the specific absorption rate (SAR) of nanostructures increases with an increase in the size. The contribution sheds light on the role of size and shape on important magnetic properties of the nanostructures in relation to their biomedical applications.
 
Publisher AMER CHEMICAL SOC
 
Date 2011-07-14T00:42:41Z
2011-12-26T12:47:28Z
2011-12-27T05:34:44Z
2011-07-14T00:42:41Z
2011-12-26T12:47:28Z
2011-12-27T05:34:44Z
2009
 
Type Article
 
Identifier JOURNAL OF PHYSICAL CHEMISTRY C, 113(41), 17761-17767
1932-7447
http://dx.doi.org/10.1021/jp905776g
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3812
http://hdl.handle.net/10054/3812
 
Language en