ZINC OXIDE NANORODS PREPARED AT LOW TEMPERATURES WITHOUT CATALYST

2008 ◽  
Vol 22 (26) ◽  
pp. 2617-2621
Author(s):  
M. A. SHAH
Keyword(s):  
Zinc Oxide ◽  
Large Scale ◽  
Zinc Oxide Nanorods ◽  
Scale Production ◽  
Energy Dispersive Analysis ◽  
Novel Approach ◽  
Large Scale Production ◽  
Fast Route ◽  
Oxide Nanorods ◽  
Plausible Mechanism

An easy and novel approach is described for the formation of zinc oxide nanorods by simple reaction of zinc metal with water in a very low temperature range of 25–75°C. It offers a facile and fast route for large scale production of zinc oxide nanorods without catalysts. The diameters of the nanorods range from 30–120 nm with several micrometers in length. The resulting nanorods have been comprehensively characterized by Field Emission Scanning Electron Microscopy (FESEM) coupled with Energy Dispersive Analysis (EDX). A plausible mechanism is proposed for the formation of these nanorods and it is expected that this synthetic technique can be extended to obtain other oxides. This will contribute to broadening the range of materials.

A VERSATILE APPROACH FOR THE SYNTHESIS OF ALUMINUM OXIDE NANORODS BASED ON A SIMPLE REACTION

2009 ◽  
Vol 23 (13) ◽  
pp. 1723-1729 ◽  
Author(s):  
M. A. SHAH
Keyword(s):  
Aluminum Oxide ◽  
Luminescence Band ◽  
Large Scale ◽  
Scale Production ◽  
Simple Reaction ◽  
Large Scale Production ◽  
Oxide Nanorods ◽  
Plausible Mechanism ◽  
Blue Luminescence Band ◽  
Two Peaks

Aluminum oxide (α -Al 2 O 3) nanorods have been successfully synthesized by a simple reaction of aluminum powder with water without any additives/organics at 100°C. This is the first report for the synthesis of aluminum oxide nanorods where water has been used as solvent as well as a source of oxygen. The diameters of nanorods are relatively uniform, ranging from 40–60 nm with length of several micrometers. A plausible mechanism is proposed for the formation of these nanorods and is expected that this synthetic technique can be extended to obtain other metal oxides. Photoluminescence measurements reveal a blue luminescence band with two peaks at 310 and 420 nm, which could be attributed to F + centers. The reported method is new, economical, fast and free of pollution, which will make it suitable for large scale production.

Large scale synthesis of zinc oxide nanorods by homogeneous chemical vapour deposition and their characterisation

2007 ◽  
Vol 201 (22-23) ◽  
pp. 9200-9204 ◽  
Author(s):  
Revathi Bacsa ◽  
Yolande Kihn ◽  
Marc Verelst ◽  
Jeannette Dexpert ◽  
Wolfgang Bacsa ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Chemical Vapour Deposition ◽  
Large Scale ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Zinc Oxide Nanorods ◽  
Oxide Nanorods ◽  
Homogeneous Chemical ◽  
Large Scale Synthesis

scholarly journals Sustainable Fully Printed UV Sensors on Cork Using Zinc Oxide/Ethylcellulose Inks

Micromachines ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 601 ◽  
Author(s):  
Joana Figueira ◽  
Cristina Gaspar ◽  
José Tiago Carvalho ◽  
Joana Loureiro ◽  
Elvira Fortunato ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Flexible Electronics ◽  
Large Scale ◽  
Low Cost ◽  
Scale Production ◽  
Large Scale Production ◽  
Production Techniques ◽  
Uv Lamp ◽  
Uv Sensors ◽  
The Internet Of Things

Low-cost and large-scale production techniques for flexible electronics have evolved greatly in recent years, having great impact in applications such as wearable technology and the internet of things. In this work, we demonstrate fully screen-printed UV photodetectors, successfully fabricated at a low temperature on a cork substrate, using as the active layer a mixture of zinc oxide nanoparticles and ethylcellulose. The photoresponse under irradiation with a UV lamp with peak emission at 302 nm exhibited a quasi-quadratic behavior directly proportional to the applied voltage, with a photocurrent of about 5.5 and 20 μA when applying 1.5 V and 5 V, respectively. The dark current stayed below 150 nA, while the rise and falling times were, respectively, below 5 and 2 s for both applied voltages. The performance was stable over continuous operation and showed a degradation of only 9% after 100 bending cycles in a 45 mm radius test cylinder. These are promising results regarding the use of this type of sensor in wearable applications such as cork hats, bracelets, or bags.

scholarly journals Cytotoxic and Antioxidant Activity of Zinc Oxide Nanoparticles Synthesised Using Maranta Arundinacea Root Extract

2020 ◽  
Vol 11 (3) ◽  
pp. 4372-4377
Author(s):  
Aparna J ◽  
Rajeshkumar S
Keyword(s):  
Antioxidant Activity ◽  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Large Scale ◽  
Oxide Nanoparticles ◽  
Root Extract ◽  
Scale Production ◽  
Synthesis Of Nanoparticles ◽  
Large Scale Production ◽  
Uv Visible

The main aim of this study was to employ Maranta arundinacea root extract in the synthesis of Zinc oxide nanoparticles and check the antioxidant activity and cytotoxic effect. The use of nanotechnology in medicine especially for drug delivery is shown to have numerous benefits. Nanoparticles are being used to lessen toxicity and facet results that capsules may additionally impose on the patient. The zinc oxide nanoparticles synthesized using different plant extract used for many biomedical applications such as anticancer activity, antibacterial activity, antioxidant activity, antifungal activity and many more applications used in medicine ( Diagnosis and drug) Plant mediated organic synthesis of nanoparticles has been gaining importance because of its simplicity and eco friendliness. Maranta arundinacea mediated Zinc oxide nanoparticles were initially synthesised and characterised by UV-Visible spectrophotometer and TEM. Further the Maranta arundinacea mediated ZnoNPs were subjected to DPPH assay to determine the antioxidant activity. Maranta arundinacea mediated ZnoNPs were biosynthesised with ease and showed good antioxidant and cytotoxic activity . This study concludes that Maranta arundinacea mediated ZnoNPs nanoparticles have the potential to be used as an effective antioxidant. Hence, it may be employed in large scale production and may be used in many medicinal applications where there is a need for antioxidant.

scholarly journals Rescue of germ cells in dnd crispant embryos opens the possibility to produce inherited sterility in Atlantic salmon

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hilal Güralp ◽  
Kai O. Skaftnesmo ◽  
Erik Kjærner-Semb ◽  
Anne Hege Straume ◽  
Lene Kleppe ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Germ Cell ◽  
Germ Cells ◽  
Large Scale ◽  
Environmental Concern ◽  
Scale Production ◽  
Genetic Introgression ◽  
Cell Stage ◽  
Novel Approach ◽  
Large Scale Production

Abstract Genetic introgression of escaped farmed Atlantic salmon (Salmo salar) into wild populations is a major environmental concern for the salmon aquaculture industry. Using sterile fish in commercial aquaculture operations is, therefore, a sustainable strategy for bio-containment. So far, the only commercially used methodology for producing sterile fish is triploidization. However, triploid fish are less robust. A novel approach in which to achieve sterility is to produce germ cell-free salmon, which can be accomplished by knocking out the dead-end (dnd) gene using CRISPR-Cas9. The lack of germ cells in the resulting dnd crispants, thus, prevents reproduction and inhibits subsequent large-scale production of sterile fish. Here, we report a rescue approach for producing germ cells in Atlantic salmon dnd crispants. To achieve this, we co-injected the wild-type (wt) variant of salmon dnd mRNA together with CRISPR-Cas9 constructs targeting dnd into 1-cell stage embryos. We found that rescued one-year-old fish contained germ cells, type A spermatogonia in males and previtellogenic primary oocytes in females. The method presented here opens a possibility for large-scale production of germ-cell free Atlantic salmon offspring through the genetically sterile broodstock which can pass the sterility trait on the next generation.

scholarly journals Zinc oxide films grown by galvanic deposition from 99% metals basis zinc nitrate electrolyte

2014 ◽  
Vol 2 (25) ◽  
pp. 9626-9635 ◽  
Author(s):  
S. Calnan ◽  
W. Riedel ◽  
S. Gledhill ◽  
B. Stannowski ◽  
R. Schlatmann ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Cost Saving ◽  
Large Scale ◽  
Zinc Nitrate ◽  
Zno Films ◽  
Scale Production ◽  
Zinc Oxide Films ◽  
Large Scale Production ◽  
Galvanic Deposition ◽  
The Cost

The use of relatively low purity zinc nitrate for electrochemical deposition of compact ZnO films is attractive for large scale production because of the cost saving potential.

A novel synthesis of carbon nanotubes directly from an indecomposable solid carbon source for electrochemical applications

2016 ◽  
Vol 4 (6) ◽  
pp. 2137-2146 ◽  
Author(s):  
Zhi Zhang ◽  
Shichun Mu ◽  
Bowei Zhang ◽  
Lu Tao ◽  
Shifei Huang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Large Scale ◽  
Low Cost ◽  
Chemical Vapor ◽  
Scale Production ◽  
Solid Carbon ◽  
Novel Approach ◽  
Large Scale Production ◽  
Solid Carbon Source ◽  
Synthesis Of Carbon Nanotubes

Carbon nanotubes (CNTs) are firstly synthesized through a novel low cost self-vaporized chemical vapor deposition (SCVD) technique, which represents a novel approach toward large scale production of CNTs.

Novel Low Temperature Chemical Synthesis and Characterization of Zinc Oxide Nanostructures

2008 ◽  
Vol 8 (8) ◽  
pp. 4290-4294
Author(s):  
P. K. Giri ◽  
S. Bhattacharyya ◽  
B. Chetia ◽  
B. K. Panigrahi ◽  
K. G. M. Nair ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Electron Microscope ◽  
Low Temperature ◽  
Large Scale ◽  
Hexagonal Phase ◽  
High Yield ◽  
Scale Production ◽  
Zinc Oxide Nanostructures ◽  
Step Method ◽  
Large Scale Production

We report a new and highly efficient method to synthesize zinc oxide (ZnO) nanostructures having a variety of sizes and shapes. A simple chemical reaction is followed that utilizes the oxidation of metallic zinc in the presence of an appropriate catalyst. This one-step method has advantages such as low temperature and atmospheric pressure synthesis, high yield of more than 90% and excellent optical and crystalline properties of the product. X-ray diffraction pattern of the samples shows hexagonal phase of ZnO with particles size in the range of 60–75 nm. Scanning electron microscope and transmission electron microscope images of the ZnO show hexagonal and rod-shaped nanoparticles. UV-visible spectra of the dispersed samples show strong absorption peaks at ∼378 nm. The photoluminescence spectra show a strong emission peak at ∼388 nm indicating good optical characteristics. The product formed is found to be dependent on the ratio of the starting materials and on other reaction conditions such as temperature, time etc. This method is suitable for large-scale production of nanosized ZnO and could be extended for the synthesis of other metal oxides, such as MgO etc.

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