Journal ArticleDOI
Investigation on structural, optical and dielectric properties of Co doped ZnO nanoparticles synthesized by gel-combustion route
TLDR
In this article, the synthesis of Co doped ZnO nanoparticles by combustion method using citric acid as a fuel for 0, 1, 3, 5% and 10% of Co doping was reported.Abstract:
We report the synthesis of Co doped ZnO nanoparticles by combustion method using citric acid as a fuel for 0%, 1%, 3%, 5% and 10% of Co doping. The structural, optical and dielectric properties of the samples were studied. Crystallite sizes were obtained from the X-ray diffraction (XRD) patterns whose values are decreasing with increase in Co content up to 5%. The XRD analysis also ensures that ZnO has a hexagonal (wurtzite) crystal structure and Co2+ ions were successfully incorporated into the lattice positions of Zn2+ ions. The TEM image shows the average particle size in the range of 10–20 nm for 3% Co doped ZnO nanoparticles. The energy band gap as obtained from the UV–visible spectrophotometer was found gradually increasing up to 5% of Co doping. The dielectric constants (ɛ′, ɛ″), dielectric loss (tan δ) and ac conductivity (σac) were studied as the function of frequency and composition, which have been explained by ‘Maxwell Wagner Model’.read more
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Oxygen vacancy induced band gap narrowing of ZnO nanostructures by an electrochemically active biofilm
Sajid Ali Ansari,Mohammad Mansoob Khan,Shafeer Kalathil,Ambreen Nisar,Jintae Lee,Moo Hwan Cho +5 more
TL;DR: A simple biogenic approach for the promotion of oxygen vacancies in pure zinc oxide (p-ZnO) nanostructures using an electrochemically active biofilm (EAB), which is different from traditional techniques for narrowing the band gap of nanomaterials, resulted in band gap narrowing of the ZnO nanostructure.
Journal ArticleDOI
Transition-Metal-Doped Zinc Oxide Nanoparticles as a New Lithium-Ion Anode Material
Dominic Bresser,Franziska Mueller,Martin Fiedler,Steffen Krueger,Richard Kloepsch,Dietmar Baither,Martin Winter,Elie Paillard,Stefano Passerini +8 more
TL;DR: In this paper, a transition metal-doped zinc oxide nanoparticles were used as anode material for lithium-ion batteries, achieving a capacity of more than 1000 mAh g/1.
Journal ArticleDOI
Comparative study of the cytotoxic and genotoxic potentials of zinc oxide and titanium dioxide nanoparticles
TL;DR: ZnO and TiO2 NPs exerted roughly equal oxidative stress in terms of aforementioned stress markers and were found to generate reactive oxygen species (ROS) concomitant with depletion of glutathione and GST levels and increased SOD, CAT and lipid peroxidation in dose dependent manner.
Journal ArticleDOI
The optoelectronic properties and role of Cu concentration on the structural and electrical properties of Cu doped ZnO nanoparticles
TL;DR: In this paper, the authors synthesized a Cu-doped ZnO (CZO) nanoparticles material using a sol-gel method with different doping concentrations of Cu (0, 2, 3 and 4
Journal ArticleDOI
ROS-dependent anticandidal activity of zinc oxide nanoparticles synthesized by using egg albumen as a biotemplate
Mohd Shoeb,Braj Raj Singh,Javed Khan,Wasi Khan,Brahma N. Singh,Harikesh Bahadur Singh,Alim H. Naqvi +6 more
TL;DR: This green approach based on egg white-mediated synthesis of ZnO NPs paves the way for developing cost effective, eco-friendly and promising antimicrobial nanomaterial for applications in medicine.
References
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BookDOI
Amorphous and liquid semiconductors
TL;DR: In this article, the nature of the amorphous state and the electronic properties of the Amorphous Semi-conductors have been investigated in the context of liquid semiconductors.
Journal ArticleDOI
Zinc oxide nanostructures: growth, properties and applications
TL;DR: In this paper, a review of various nanostructures of ZnO grown by the solid-vapour phase technique and their corresponding growth mechanisms is presented. And the application of nanobelts as nanosensors, nanocantilevers, field effect transistors and nanoresonators is demonstrated.
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On the Dispersion of Resistivity and Dielectric Constant of Some Semiconductors at Audiofrequencies
TL;DR: In this paper, the ac resistivity and the apparent dielectric constant of the material show a dispersion which can be explained satisfactorily with the help of a simple model of the solid: there should be wellconducting grains separated by layers of lower conductivity.