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Synthesis and Characterization on Fe-doped In2O3 Nanoparticles

Published online by Cambridge University Press:  01 February 2011

Sandra Dussan-Devia ,
Manoj K Singh ,
G. L. Sharman ,
R. S. Katiyar  and
C Rinaldi
Sandra Dussan-Devia
Affiliation:
[email protected], University of Puerto Rico, physics, PO Box 23343, San Juan, 00931, Puerto Rico
Manoj K Singh
Affiliation:
[email protected], University of Puerto Rico, Department of Physics and Institute for Functional Nanomaterials, San Juan, 00931, Puerto Rico
G. L. Sharman
Affiliation:
[email protected], University of Puerto Rico, Department of Physics and Institute for Functional Nanomaterials, San Juan, 00931, Puerto Rico
R. S. Katiyar
Affiliation:
[email protected], University of Puerto Rico, Department of Physics and Institute for Functional Nanomaterials, San Juan, 00931, Puerto Rico
C Rinaldi
Affiliation:
[email protected], University of Puerto Rico, Department of Chemical Engineering, Mayaguez, 00681-9046, Puerto Rico
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Abstract

Pure and Fe-doped In2O3 nanocrystalline powder was synthesized using a solution chemistry route based on the Sol-Gel process, which is a simple and inexpensive technique and produces long-time stable stock solutions. The X-ray diffraction patterns revealed the formation of nanocrystalline particle size with well-crystallized cubic bixbyte structure. The average crystal size was calculated from XRD patterns using Debye-Scherrer's equation for the (222) peak and found to be 8 nm. This observation agrees well with the particle size estimated from transmission electron microscopy (TEM). The observed Raman peaks in the doped materials are shifted towards the lower frequency up to 15 cm−1 and we did not observed any additional new Raman modes with Fe doping. This clearly indicates that Fe ions are indeed occupying interstitial/substitutional sites in the host In2O3, in agreement with XPS measurements. Magnetic properties were studied using superconducting quantum interface device magnetometer (Quantum design MPMS XL-7). Preliminary magnetic measurement results suggest the incorporation of the dopants in the diamagnetic In2O3-host structure.

Keywords

spintronictransmission electron microscopy (TEM)Raman spectroscopy
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1074: Symposium I – Synthesis and Metrology of Nanoscale Oxides and Thin Films , 2008 , 1074-I10-40
Copyright
Copyright © Materials Research Society 2008

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References

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