scholarly journals Band gap engineered zinc oxide nanostructures via a sol–gel synthesis of solvent driven shape-controlled crystal growth

RSC Advances ◽  
2019 ◽  
Vol 9 (26) ◽  
pp. 14638-14648 ◽  
Author(s):  
Klinton Davis ◽  
Ryan Yarbrough ◽  
Michael Froeschle ◽  
Jamel White ◽  
Hemali Rathnayake
Keyword(s):  
Zinc Oxide ◽  
Crystal Growth ◽  
Growth Process ◽  
Sol Gel ◽  
Zno Nanostructures ◽  
Zinc Oxide Nanostructures ◽  
Oxide Nanostructures ◽  
Crystal Growth Process ◽  
Shape Controlled ◽  
Sol Gel Synthesis

A reliable and simple sol–gel synthesis followed by a solvent-driven, shape controlled, crystal growth process to make ZnO nanostructures is demonstrated.

scholarly journals Characterization of Zinc oxide Nanostructures prepared by hydrothermal method with Antibacterial property

2019 ◽  
Vol 17 (42) ◽  
pp. 108-124
Author(s):  
Ibrahim Abdulkareem Ali
Keyword(s):  
Zinc Oxide ◽  
Antibacterial Activity ◽  
Crystallite Size ◽  
Annealing Temperature ◽  
Energy Gap ◽  
Antibacterial Property ◽  
Zno Nanostructures ◽  
Zinc Oxide Nanostructures ◽  
Oxide Nanostructures ◽  
Uv Visible

        In this study, Zinc oxide nanostructures were synthesized via a hydrothermal method by using zinc nitrate hexahydrate and sodium hydroxide as a precursor. Three different annealing temperatures were used to study their effect on ZnO NSs properties. The synthesized nanostructure was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Atomic force microscope (AFM), and Fourier Transform Infrared Spectroscopy (FTIR). Their optical properties were studied by using UV -visible spectroscopy. The XRD analysis confirms that all ZnO nanostructures have the hexagonal wurtzite structure with average crystallite size within the range of (30.59 - 34.52) nm. The crystallite size increased due to the incensement of annealing temperature. FESEM analysis indicates that ZnO has hexagonal shape of cylindrical pores, plate-like nanocrystals and Nanorods. AFM analysis shows that the average surface roughness of ZnO Nanostructures increases from 3.96 to 19.1 nm with the increase of annealing temperature. The FTIR peaks indicate successful preparation of ZnO Nanostructures. The FTIR method was used to analyses the chemical bonds which conformed the present of the Zn-O group in the region between (400-500) cm-1. The UV-visible showed a red shift in the absorption spectra related to the shift in the energy gap related to increase in the particle size.  the band gap energy has been calculated from the optical absorption spectra. The annealing process has been fond more effective on the value of energy gap. As the annealing temperature increases, the value of energy gap, increases as well; from (3.12to 3.22) eV. The prepared Nanostructure is used for antibacterial property. It shows strong antibacterial activity against S. aureus and P.aeuruginosa bacteria by the agar disc diffusion method. The white precipitate of ZnO NSs has superior antibacterial activity on gram-positive (S. aureus) than the gram-negative (P.aeuruginosa) bacteria.

Antibacterial Activities of Zinc Oxide Nanostructures with Different Structures

2019 ◽  
Vol 294 ◽  
pp. 36-41
Author(s):  
Rolen Brian P. Rivera ◽  
Melchor J. Potestas ◽  
Ma. Reina Suzette B. Madamba ◽  
Rey Y. Capangpangan ◽  
Bernabe L. Linog ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Sea Urchin ◽  
Inhibition Zone ◽  
Antibacterial Activities ◽  
The Other ◽  
Zno Nanostructures ◽  
Zinc Oxide Nanostructures ◽  
Sem Images ◽  
Structural Morphology ◽  
Oxide Nanostructures

We report on antibacterial activities of Zinc oxide (ZnO) with different structures. Fast furrier transform infrared spectroscopy ZnO nanostructures showed peaks in the range between 450–600 cm-1 indicating the successful growth through the presence of Zn-O stretching. On the other hand, impurities such as zinc complexes might be present due to the appearance of peaks at 1110 cm-1, 1390 cm-1 and 1506 cm-1. Furthermore, SEM images revealed that nanorods and sea-urchin like nanostructures are present in the produced ZnO nanostructures. Nanorods exhibit a better antibacterial response than the sea-urchin like structure. The change in structural morphology along with its purity has greatly influenced the area of bacterial inhibition zone during antibacterial testing.

Characterization of Urea versus HMTA in the Preparation of Zinc Oxide Nanostructures by Solution-Immersion Method Grown on Gold-Seeded Silicon Substrate

2011 ◽  
Vol 364 ◽  
pp. 45-49 ◽  
Author(s):  
Azlinda Ab Azlinda ◽  
Zuraida Khusaimi ◽  
Saifollah Abdullah ◽  
Mohamad Rusop
Keyword(s):  
Zinc Oxide ◽  
Silicon Substrate ◽  
High Surface ◽  
High Surface Area ◽  
Zinc Nitrate ◽  
Nitrate Hexahydrate ◽  
Zno Nanostructures ◽  
Zinc Oxide Nanostructures ◽  
Immersion Method ◽  
Oxide Nanostructures

Zinc oxide (ZnO) nanostructures prepared by immersion method were successfully grown on gold-seeded silicon substrate using Zinc nitrate hexahydrate (Zn (NO3)2.6H2O) as a precursor, separately stabilized with non-toxic urea (CH4N2O) and hexamethylene tetraamine (HMTA). The effect of changing the stabilizer of ZnO solution on the crystal structure, morphology and photoluminescence properties of the resultant ZnO is investigated. X-ray diffraction of the synthesized ZnO shows hexagonal zincite structure. The morphology of the ZnO was characterized using Field Emission Scanning Electron Microscope (FESEM). The growth of ZnO using urea as stabilizer shows clusters of ZnO nanoflower with serrated broad petals were interestingly formed. ZnO in HMTA showed growth of nanorods. The structures has high surface area, is a potential metal oxide nanostructures to be develop for optoelectronic devices and chemical sensors. The formation of ZnO nanostructures is found to be significantly affected by the stabilizer.

Effect of Electric Field and Temperature in Electrochemical Dissolution and Deposition Process on Morphologies of ZnO Nanostructures

2015 ◽  
Vol 804 ◽  
pp. 30-33
Author(s):  
Buppachat Toboonsung
Keyword(s):  
Zinc Oxide ◽  
Electric Field ◽  
Room Temperature ◽  
Deposition Process ◽  
Deionized Water ◽  
Electrochemical Dissolution ◽  
Zno Nanostructures ◽  
Constant Voltage ◽  
Zinc Oxide Nanostructures ◽  
Oxide Nanostructures

Zinc oxide nanostructures were synthesized by an electrochemical dissolution and deposition process. The zinc plates were immerged in deionized water and used as two electrodes. The process was operated by applying the electric field of 10, 12.5, 25 and 50 V/cm, the constant voltage of 10 V and varied the temperatures from room temperature to 70 °C during 1 h. It was found that the electric field and temperature of electrolyte solution had affected to morphologies of ZnO NSs and were grown in forms of nanoflakes, nanoparticles and nanorods.

Synthesis of porous nitrogen doped zinc oxide nanostructures using a novel paper mediated template method and their photocatalytic study for dye degradation under natural sunlight

2018 ◽  
Vol 2 (1) ◽  
pp. 163-170 ◽  
Author(s):  
Gajanan Kale ◽  
Sudhir Arbuj ◽  
Ujjwala Kawade ◽  
Sunit Rane ◽  
Jalindar Ambekar ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Dye Degradation ◽  
Template Method ◽  
Zno Nanostructures ◽  
Zinc Oxide Nanostructures ◽  
Natural Sunlight ◽  
Nitrogen Doped ◽  
Oxide Nanostructures

A novel paper-mediated template technique for the synthesis of N-ZnO nanostructures.

scholarly journals A sol–gel synthesis to prepare size and shape-controlled mesoporous nanostructures of binary (II–VI) metal oxides

RSC Advances ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 14134-14146 ◽  
Author(s):  
Ryan Yarbrough ◽  
Klinton Davis ◽  
Sheeba Dawood ◽  
Hemali Rathnayake
Keyword(s):  
Low Temperature ◽  
Metal Oxides ◽  
Self Assembly ◽  
Sol Gel ◽  
Assembly Process ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures ◽  
Shape Controlled ◽  
Sol Gel Synthesis ◽  
Mesoporous Metal

A base-catalyzed sol–gel approach combined with a solvent-driven self-assembly process at low temperature is augmented to make highly mesoporous metal oxide nanostructures of manganese and copper, and hydroxide nanostructures of magnesium.

scholarly journals MODELLING THE GROWTH OF ZINC OXIDE NANOSTRUCTURES

2009 ◽  
Vol 50 (3) ◽  
pp. 395-406
Author(s):  
JADE R. MACKAY ◽  
STEPHEN P. WHITE ◽  
SHAUN C. HENDY
Keyword(s):  
Zinc Oxide ◽  
Two Dimensions ◽  
Zno Nanostructures ◽  
Zinc Oxide Nanostructures ◽  
Tight Control ◽  
Oxide Nanostructures ◽  
Deposition Parameters ◽  
Wide Range ◽  
Model Predictions ◽  
Deposition Techniques

AbstractZinc oxide is known to produce a wide variety of nanostructures that show promise for a number of applications. The use of electrochemical deposition techniques for growing ZnO nanostructures can allow tight control of the morphology of ZnO through the wide range of deposition parameters available. Here we model the growth of the rods under typical electrochemical conditions, using the Nernst–Planck equations in two dimensions to predict the growth rate and morphology of the nanostructures as a function of time. Generally good quantitative and qualitative agreement is found between the model predictions and recent experimental results.

Comprehensive Overview on Zinc Oxide Nanostructures

2021 ◽  
Vol 1 (4) ◽  
pp. 55-65
Author(s):  
Shouvik Mitra ◽  
◽  
Saheli Pradhan ◽  
Keyword(s):  
Zinc Oxide ◽  
Growth Process ◽  
Thin Layers ◽  
Zinc Oxide Nanostructures ◽  
Comprehensive Overview ◽  
Nanoscience And Nanotechnology ◽  
Synthetic Strategy ◽  
Oxide Nanostructures ◽  
Synthesis Procedure ◽  
Classical Property

Zinc oxide is technologically important and ZnO thin layers are widely used in sensors, transducers and catalysts designing. However, after the introduction of nanoscience and nanotechnology the gear has been shifted to its smaller counterpart in contrast to its bulk one. In this review typical synthesis procedure, growth process, classical property, and a few biological perspectives of zinc oxide nanostructures have been highlighted. In coming years new synthetic strategy, benign fabrication will be introduced with plethora of versatile and beneficial applications based on zinc oxide nanostructures.

Photoluminescence of Sol-Gel Synthesized ZnO Nanostructures

2021 ◽  
Vol 885 ◽  
pp. 121-126
Author(s):  
Erasto Vergara Hernández ◽  
Brenda Carolina Pérez Millán ◽  
Yael Valdemar Torres Torres ◽  
César Eduardo Cea Montufar
Keyword(s):  
Optical Properties ◽  
Optical Transition ◽  
Low Cost ◽  
Sol Gel ◽  
Research Work ◽  
Synthesis Method ◽  
Visible Region ◽  
Zno Nanostructures ◽  
Zinc Oxide Nanostructures ◽  
Oxide Nanostructures

Zinc oxide nanostructures have potentially interesting optical properties, which make them candidates for use in applications within the area of optoelectronics; their synthesis can be carried out through low-cost methods, such as sol gel, among many others. In addition, depending on the synthesis method, its shape and size, ZnO nanostructures can present emissions in the ultraviolet (UV) and visible region. By doping with elements such as carbon, silver, copper or some rare earth, for example, erbium, terbium or neodymium, the optical properties of ZnO can be adjusted and controlled to be able to be applied in the production of biosensors, photodetectors and even sensors of white light. In this research work, a review is presented on the nature of the optical transition mechanisms that occur in the ZnO nanostructures synthesized by the sol-gel method.

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