Document Type
Article
Original Publication Date
2012
Journal/Book/Conference Title
Journal of Applied Physics
Volume
111
Issue
7
DOI of Original Publication
10.1063/1.3676232
Date of Submission
October 2015
Abstract
A synthesis procedure for generating a uniform distribution of iron-oxide nanoparticles from an amorphous precursor is reported. The investigation suggests no evidence of the formation of unwanted surface oxide layers, internal stress, and multiple phases. This is likely because the physical properties of the diffusion fields surrounding the nanoparticles are self-limiting by Fe(II) depletion. Inside the diffusion field surrounding the nucleation site, decreasing Fe(II) concentration results in a decrease in the diffusion rate that continues to decrease until self-limiting kinetic arrest occurs. The initial Fe(II) concentration is established by reducing a system abundant in Fe(III) by means of exposure to CO/CO2 gas at high temperature.
Rights
Laurenzi, M. A., and Carpenter, E. E. Controlled synthesis of superparamagnetic iron-oxide nanoparticles by phase transformation. Journal of Applied Physics, 111, 07B520 (2012). Copyright © 2012 American Institute of Physics.
Is Part Of
VCU Chemistry Publications
Comments
Originally published at http://dx.doi.org/10.1063/1.3676232