Band gap engineering and enhanced photoluminescence of Mg doped ZnO nanoparticles synthesized by wet chemical route

ABSTRACTMg doped ZnO thin films were prepared by DC/RF magnetron co-sputtering in (Ar+O2) ambient conditions using metallic Mg and Zn targets. We present a comprehensive study of the effects of film thickness on the structural, optical and magnetic properties. Room temperature ferromagnetism was observed in the films and the saturation magnetization (MS) increases at first as the film’s thickness increases and then decreases. The MS value as high as ∼15.76 emu/cm3 was achieved for the Mg-doped ZnO film of thickness 120 nm. The optical band gap of the films determined to be in the range 3.42 to 3.52 eV.

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Band gap engineering, enhanced morphology and photoluminescence of un-doped, Ga and/or Al-doped ZnO nanoparticles by reflux precipitation method

Journal of Luminescence ◽

10.1016/j.jlumin.2017.11.007 ◽

2018 ◽

Vol 195 ◽

pp. 54-60 ◽

Cited By ~ 13

Author(s):

J. Ungula ◽

B.F. Dejene ◽

H.C. Swart

Keyword(s):

Band Gap ◽

Zno Nanoparticles ◽

Precipitation Method ◽

Band Gap Engineering ◽

Doped Zno

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Structural, optical and magnetic properties of Co-doped ZnO nanoparticles prepared via a wet chemical route

International Journal of Modern Physics B ◽

10.1142/s0217979214501586 ◽

2014 ◽

Vol 28 (25) ◽

pp. 1450158 ◽

Cited By ~ 4

Author(s):

Javed Iqbal ◽

Raheel Ahmed Janjua ◽

Tariq Jan

Keyword(s):

Zno Nanoparticles ◽

Room Temperature Ferromagnetism ◽

Secondary Phase ◽

Band Gap Energy ◽

Linear Increase ◽

Sem Images ◽

Chemical Route ◽

Co Doping ◽

Wet Chemical ◽

Wet Chemical Route

In this paper, ZnO nanoparticles doped with varying amount of Co content (i.e., 0, 2, 4, 6, 8, and 10 at.%) have been prepared by wet chemical route. X-ray diffraction (XRD) results reveal the successful substitution of Co 2+ ions on to sites of Zn 2+ ions without forming any secondary phase. Furthermore, a linear increase in d-spacing of the ZnO lattice is found with the increase in Co content. SEM images demonstrate the formation of homogeneously distributed spherical nanoparticles with average size of 50–70 nm. It is observed from optical investigations that band gap energy of ZnO nanoparticles significantly decreased with the increase in Co doping level. Interestingly, it is found that the high Co dopant concentration can lead to room temperature ferromagnetism in ZnO nanoparticles.

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Acaricidal, pediculocidal and larvicidal activity of synthesized ZnO nanoparticles using wet chemical route against blood feeding parasites

Parasitology Research ◽

10.1007/s00436-011-2277-8 ◽

2011 ◽

Vol 109 (2) ◽

pp. 461-472 ◽

Cited By ~ 67

Author(s):

Arivarasan Vishnu Kirthi ◽

Abdul Abdul Rahuman ◽

Govindasamy Rajakumar ◽

Sampath Marimuthu ◽

Thirunavukkarasu Santhoshkumar ◽

...

Keyword(s):

Larvicidal Activity ◽

Zno Nanoparticles ◽

Blood Feeding ◽

Chemical Route ◽

Wet Chemical ◽

Wet Chemical Route

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Structures of chemically stabilized ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100150459 ◽

1993 ◽

Vol 51 ◽

pp. 924-925

Author(s):

Pratibha L. Gai ◽

M. A. Saltzberg ◽

L.G. Hanna ◽

S.C. Winchester

Keyword(s):

High Temperature ◽

Calcium Nitrate ◽

Nitrate Hexahydrate ◽

Chemical Route ◽

Cubic Form ◽

Tetragonal Form ◽

Wet Chemical ◽

Wet Chemical Route ◽

Final Composition ◽

Aluminium Nitrate Nonahydrate

Silica based ceramics are some of the most fundamental in crystal chemistry. The cristobalite form of silica has two modifications, α (low temperature, tetragonal form) and β (high temperature, cubic form). This paper describes our structural studies of unusual chemically stabilized cristobalite (CSC) material, a room temperature silica-based ceramic containing small amounts of dopants, prepared by a wet chemical route. It displays many of the structural charatcteristics of the high temperature β-cristobalite (∼270°C), but does not undergo phase inversion to α-cristobalite upon cooling. The Structure of α-cristobalite is well established, but that of β is not yet fully understood.Compositions with varying Ca/Al ratio and substitutions in cristobalite were prepared in the series, CaO:Al2O3:SiO2 : 3-x: x : 40, with x= 0-3. For CSC, a clear sol was prepared from Du Pont colloidal silica, Ludox AS-40®, aluminium nitrate nonahydrate, and calcium nitrate hexahydrate in proportions to form a final composition 1:2:40 composition.

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