Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Preparation of iron oxide nanoparticles by microwave synthesis and their characterization
Date
2008-02-01
Author
Acarbas, Ozge
Ozenbas, Macit
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
223
views
0
downloads
Cite This
In this study production of fine particle Fe2O3 via microwave processing of Fe(NO3)(3)center dot nH(2)O followed by low temperature annealing was reported. XRD was used to characterize the structural properties of nanoparticles. Approximate particle sizes were between 3-13 nm according to Scherrer's equation. Single point BET measurement results also show that samples have large surface area and they are nanometer sized particles. TEM study was conducted to examine the structure of the nanoparticles. TEM figure is in good agreement with the results obtained from Scherrer's equation using XRD spectra. In order to characterize the magnetic properties of the nanoparticles VSM (Vibrating Sample Magnetometer) was used. From these results it can be concluded that the sample containing only maghemite phase exhibits superparamagnetic behaviour, on the other hand sample containing both hematite and maghemite phases shows paramagnetic behaviour above 300 K, superparamagnetic behavior at lower temperatures.
Subject Keywords
General Materials Science
,
Bioengineering
,
General Chemistry
,
Condensed Matter Physics
,
Biomedical Engineering
URI
https://hdl.handle.net/11511/64983
Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
DOI
https://doi.org/10.1166/jnn.2008.b268
Collections
Department of Metallurgical and Materials Engineering, Article
Suggestions
OpenMETU
Core
Evaluation of the radiative recombination mechanism in Si nanocrystals embedded in silica matrix
Righini, Marcofabio; Gnoli, Andrea; Razzari, Luca; Serincan, Ugur; Turan, Raşit (American Scientific Publishers, 2008-02-01)
We report measurements of the temperature dependence of photoluminescence (PQ life-time and efficiency of Si nanocrystals (Si-Nc) embedded in silica matrix. We use a practical technique based on lock-in acquisition that allows us to simultaneously evaluate, at each emission-energy, intensity and decay-time of the detected signal. Samples are prepared by Silicon-ion implantation in a SiO2 layer followed by thermal annealing. The implantation dose of Si ions ranges between 2 x 10(16) cm(-2) and 2 x 10(17) cm(...
Synthesis of silver nanoparticles by oleylamine-oleic acid reduction and its use in making nanocable by coaxial electrospinning
Çınar, Simge; MAVİŞ, BORA; Çolak, Üner (American Scientific Publishers, 2011-12-01)
In the present study, silver nanoparticles were produced by hydrazine hydrate and oleylamine/oleic acid systems in order to investigate the effects of reducing agents with different strengths on the reduction mechanism. Particle size and size distribution of silver particles produced by slow reducing system were studied in detail by using transmission electron microscopy (TEM), X-Ray Diffraction (XRD), photon correlation spectroscopy (PCS), and surface plasmon resonance spectroscopy (SPR). Finally, reductio...
Investigation of carrier scattering mechanisms in TIInS2 single crystals by Hall effect measurements
Qasrawi, AF; Hasanlı, Nızamı (Wiley, 2004-05-01)
TlInS2 single crystals are studied through the conductivity and Hall effect measurements in the temperature regions of 100-400 and 170-400 K, respectively. An anomalous behavior of Hall voltage, which changes sign below 315 K, is interpreted through the existence of deep donor impurity levels that behave as acceptor levels when are empty. The hole and electron mobility are limited by the hole- and electron-phonon short range interactions scattering above and below 315 K, respectively. An energy level of 35 ...
Analysis of the Specific Heat in the Supercooled Solid Phase of Liquid Crystals
Kilit, Emel; Yurtseven, Hasan Hamit (Informa UK Limited, 2011-01-01)
The specific heat Cp is analyzed using the experimental data at various temperatures in the solid phase of cholesteryl myristate according to a power-law formula for the rapidly and slowly cooled solid in the stability limit. We also analyze the temperature dependence of the Cp using the experimental data for the supercooled solid phase of p-azoxyanisole in the stability limit and the stability temperatures are determined for both cholesteryl myristate and p-azoxyanisole.
Effects of annealing on structural, electrical and optical properties of AgGa(Se0.5S0.5)(2) thin films deposited by using sintered stoichometric powder
KARAAĞAÇ, HAKAN; Parlak, Mehmet (Wiley, 2009-04-01)
The structural, electrical and optical properties of AgGa(Se0.5S0.5)(2) thin films deposited by using the thermal evaporation method have been investigated as a function of annealing in the temperature range of 450-600 degrees C. X-ray diffraction (X-RD) analysis showed that the structural transformation from amorphous to polycrystalline structure started at 450 degrees C with mixed binary phases of Ga2Se3, Ga2S3, ternary phase of AgGaS2 and single phase of S. The compositional analysis with the energy disp...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
O. Acarbas and M. Ozenbas, “Preparation of iron oxide nanoparticles by microwave synthesis and their characterization,”
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
, pp. 655–659, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64983.