Abstract
We report the crystal structure, morphology and optical properties of the Zn1-xMnxO nanoparticles with nominal composition (x = 0.00, 0.05, 0.10, 0.15 & 0.20) were synthesized by sol-gel route. The crystal structure analysis was carried out by X-ray diffraction technique (XRD), morphology and particle size was investigated using Transition electron microscopy (TEM), Optical characterization was performed using UV-VIS technique. The XRD studies show that samples have wurtzite (hexagonal) crystal structure. In addition to this XRD results also indicate no extra impurity or secondary phases are observed. The lattice parameters a and c of Zn1-xMnxO nanoparticles increase with increasing Mn content which indicates that Mn 2+ ions go to Zn 2+ ions in the ZnO lattice. The atomic packing fraction (APF) increase of Mn doped ZnO nanoparticles with increasing Mn content. TEM microphotographs show that the pure and 10% Mn doped ZnO nanoparticles are in spherical shape and their average particle size of pure and 10% Mn doped ZnO nanoparticles are found in the range of 20-60 nm. The optical energy band gap decreases with increasing Mn concentration, it may be owing to Mn clustering.
Highlights
Zinc oxide (ZnO) has attracted much attention in the last few decades due to its wide variety of application such as sensors, field-emission transistors, ultraviolet photo-detectors, biomedical systems such as ultrasensitive DNA sequence detectors [1,2,3,4,5]
It has been seen that the X-ray diffraction technique (XRD) peak nanoparticles because of higher ionic radius of Mn2+ ions in broadening increases with increasing Mn content, when the comparison to the Zn2+ ions
Optical energy band gap goes on decreasing with increasing Mn content it may be due to Mn clustering, reduction in average crystallite size and enhancement of surface area to volume ratio
Summary
Zinc oxide (ZnO) has attracted much attention in the last few decades due to its wide variety of application such as sensors, field-emission transistors, ultraviolet photo-detectors, biomedical systems such as ultrasensitive DNA sequence detectors [1,2,3,4,5]. ZnO is a semiconductor with a wide band gap i.e. 3.37 eV. Zinc oxide is used for spintronics applications with magnetic ions i.e. Co, Ni, Mn, V and Fe doping. For this reason, Mn doping has valuable spin off in electrical, magnetic and optical properties of ZnO. Mn doped ZnO has become a reasonable choice for diluted magnetic semiconductor (DMS). Diluted magnetic semiconductor (DMS) materials have many unique applications such as magneto-optical, magneto-electrical and magneto-transport properties etc [6]. In this study we focused on the structural, morphological and optical properties of Mn doped ZnO nanoparticles prepared by sol-gel technique. Effect of Mn doping on the lattice parameters, crystallite size, volume of unit cell, atomic packing fraction (APF), X-ray density and energy band gap were investigated qualitatively and quantitatively in this paper
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
