Next Article in Journal
High-Temperature Compressive Resistance and Mechanical Properties Improvement of Strain-Induced Melt Activation-Processed Al-Mg-Si Aluminum Alloy
Previous Article in Journal
Effects of Current Stressing on the Grain Structure and Mechanical Properties of Ag-Alloy Bonding Wires with Various Pd and Au Contents
Article Menu

Export Article

Open AccessArticle
Metals 2016, 6(8), 181; doi:10.3390/met6080181

Structure and Physical Properties of NiO/Co3O4 Nanoparticles

1
Department of Physics, Faculty of Science, Malayer University, Malayer 65719-95863, Iran
2
Center for Quantum Devices, Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, IL 60208, USA
3
Department of Physics, Universiti Putra Malaysia, Serdang 43400, Malaysia
4
Department of Chemistry, Azad University, Shahre-Ghods Branch, Tehran 37541-374, Iran
5
Institute of Micro Engineering and Nano Electronics (IMEN), Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
6
Department of Physics, Farhangian University, Shiraz 71456-15515, Iran
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 24 March 2016 / Revised: 8 June 2016 / Accepted: 28 June 2016 / Published: 5 August 2016
View Full-Text   |   Download PDF [2322 KB, uploaded 5 August 2016]   |  

Abstract

The thermal treatment method was employed to prepare nickel-cobalt oxide (NiO/Co3O4) nanoparticles. This method was attempted to achieve the higher homogeneity of the final product. Specimens of nickel-cobalt oxide were characterized by various experimental techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). X-ray diffraction results showed that there was no crystallinity in the predecessor, and it still had the amorphous phase. The formations of the crystalline phases of the nickel-cobalt oxide nanoparticles started from 350–500 °C, and the final products had different crystallite sizes ranging from 11–35 nm. Furthermore, the variation of DC conductivity (σdc), impedance, tangent loss (tgδ) and dielectric constant (ε′) of the calcined specimens with frequency in the range of 102–106 Hz was investigated. σdc showed a value of 1.9 × 10−6 S/m, 1.3 × 10−6 S/m and 1.6 × 10−6 S/m for the specimens calcined at 350, 400 and 450 °C, respectively. Additionally, a decrease in tgδ values with an increase in temperature was observed. Finally, the formed nanoparticles exhibited ferromagnetic behaviors, which were confirmed by using a vibrating sample magnetometer (VSM). View Full-Text
Keywords: nickel-cobalt oxide nanoparticles; conductivity; dielectric constant; magnetic properties nickel-cobalt oxide nanoparticles; conductivity; dielectric constant; magnetic properties
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Naseri, M.; Dehzangi, A.; Kamari, H.M.; See, A.; Abedi, M.; Salasi, R.; Goli-Kand, A.N.; Dianat, P.; Larki, F.; Abedini, A.; Hassan, J.; Far, A.K.; Majlis, B.Y. Structure and Physical Properties of NiO/Co3O4 Nanoparticles. Metals 2016, 6, 181.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top