Photoluminescence features of magnetic nano-metric metal oxides
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Photoluminescence features of magnetic nano-metric metal oxides M. Rashad1,2 · Atif Mossad Ali3 · M. I. Sayyed2 · I. V. Kityk4 Received: 2 March 2018 / Accepted: 5 April 2018 © Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract Copper oxide (CuO) and cobalt oxide (Co3O4) nanoparticles (NPs) have been synthesized using microwave irradiation method. These NPs have been prepared using copper nitrate and cobalt nitrate, respectively as the starting materials. The resulted powder of these NPs were explored by X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy (TEM), thermogravimetry and differential thermal analysis (DTA). XRD observations obtained the formation of nanostructure phase for both types of these NPs. The structural observations were helped for identifying the nano nature of these both materials. Optical properties such as photoluminescence (PL) and absorbance (A) of CuO and Co3O4 NPs have been studied. A resulted shift of PL with respect to absorption peak is 290 and 172 nm for CuO and C o3O4 NPs, respectively. Moreover, the magnetic hysteresis loop of both CuO and Co3O4 NPs were measured. The magnetic investigations obtained that the magnetic response with a maximum moment M ≤ 0.07 emu/g is shown up to the maximum applied the field of 5 kOe for CuO NPs which is related to the uncompensated surface spins. On the other hand, the magnetization curve has linear shape in the field range used with the irreversible contribution for Co3O4 NPs.
1 Introduction Semiconductor of nanocrystalline particles has attracted an enhanced interest during the last few years due to their exceptional properties, for example, a large surface to volume ratio, expanded activity, and interesting optical properties when contrasted with those of the mass materials [1–3]. Moreover, the nano metal oxides are of enhanced interest due to their captivating and distinctive properties such as optical, antibacterial, sensing, chemical, mechanical, magnetic features, moreover for electric circuits [4]. It is well known that there are two main aspects of the magnetic particles. The first one caused by their facilitate positioning
* M. Rashad [email protected] 1
Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
2
Physics Department, Faculty of Science, University of Tabuk, P.O. Box 741, Tabuk 71491, Saudi Arabia
3
Physics Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
4
Institute of Optoelectronics and Measuring Systems, Faculty of Electrical Engineering, Czestochowa University of Technology, 17 ArmiiKrajowej Str., 42‑200 Czestochowa, Poland
of the porous material by an external magnetic force. It has application to the magnetic recovery in a batch reactor for more precision of localization in devices of microfluidics. The second one is their affording of a magneto-thermal effect under an alternate magnetic field exposed [5]. The antiferromagnetic nanoparticles (NPs) properties have been
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