Hydrothermal zinc oxide nanowire growth using zinc acetate dihydrate salt

2012 ◽  
Vol 27 (11) ◽  
pp. 1445-1451 ◽  
Author(s):  
Mehmet Can Akgun ◽  
Yunus Eren Kalay ◽  
Husnu Emrah Unalan
Keyword(s):  
Zinc Oxide ◽  
Zinc Acetate ◽  
Zinc Acetate Dihydrate ◽  
Nanowire Growth ◽  
Acetate Dihydrate ◽  
Zinc Oxide Nanowire ◽  
Image Position

Abstract

SPECTROSCOPIC ELLIPSOMETRY STUDIES ON ZINC OXIDE THIN FILMS DEPOSITED BY SOL–GEL METHOD WITH VARIOUS PRECURSOR CONCENTRATIONS

2019 ◽  
Vol 26 (03) ◽  
pp. 1850158 ◽  
Author(s):  
MARYAM MOTALLEBI AGHGONBAD ◽  
HASSAN SEDGHI
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Optical Properties ◽  
Spectroscopic Ellipsometry ◽  
Zinc Acetate ◽  
Optical Band Gap ◽  
Zinc Acetate Dihydrate ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Acetate Dihydrate

Zinc Oxide thin films were deposited on glass substrates by sol–gel spin coating method. Zinc acetate dihydrate, 2-methoxyethanol and monoethanolamine were used as precursor, solvent and stabilizer, respectively. Zinc acetate dihydrate was used with different molar concentrations of 0.15, 0.25 and 0.5 M. Optical properties of ZnO thin films such as dielectric constants, absorption coefficient, Urbach energy and optical band gap energy were calculated by spectroscopic ellipsometry (SE) method. The effect of zinc acetate concentration on optical properties of ZnO thin films is investigated. ZnO thin film with Zn concentration of 0.25 M had the highest optical band gap. Wemple DiDomenico oscillator model was used for calculation of the energy of effective dispersion oscillator, the dispersion energy, the high frequency dielectric constant, the long wavelength refractive index and the free carrier concentration.

Hydrothermal zinc oxide nanowire growth with different zinc salts

2012 ◽  
Vol 27 (18) ◽  
pp. 2401-2407 ◽  
Author(s):  
Mehmet Can Akgun ◽  
Aysegul Afal ◽  
Husnu Emrah Unalan
Keyword(s):  
Zinc Oxide ◽  
Nanowire Growth ◽  
Zinc Salts ◽  
Zinc Oxide Nanowire ◽  
Image Position

Abstract

scholarly journals Biosynthesis, characterization, and antibacterial activity of ZnO nanoaggregates using aqueous extract from Anacardium occidentale leaf: comparative study of different precursors

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Eric Kwabena Droepenu ◽  
Ebenezer Aquisman Asare ◽  
Boon Siong Wee ◽  
Rafeah Binti Wahi ◽  
Frederick Ayertey ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Antibacterial Activity ◽  
Comparative Study ◽  
Aqueous Extract ◽  
Zinc Chloride ◽  
Zinc Acetate ◽  
Zinc Acetate Dihydrate ◽  
Inhibition Zone ◽  
Anacardium Occidentale ◽  
Acetate Dihydrate

Abstract Background Various parts of Anacardium occidentale plant possess curative qualities like antidiabetic, anti-inflammatory, antibacterial, antifungal, and antioxidant. Aqueous extract of this plant leaf was used in biosynthesizing zinc oxide (ZnO) nanoaggregates using two precursors of zinc salt (zinc acetate dihydrate [Zn(CH3COO)2∙2H2O] and zinc chloride [ZnCl2]). The synthesized ZnO samples were used in a comparative study to investigate the antibacterial activity against selected Gram-positive and Gram-negative microbes [Staphylococcus aureus, Exiguobacterium aquaticum (Gram +ve) and Escherichia coli, Klebsiella pneumoniae, Acinetobacter baumannii (Gram −ve)]. The synthesized ZnO nanoaggregates from the two precursors were characterized using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive x-ray spectroscopy (EDX) techniques. Results Micrographs of SEM and TEM confirmed nanoparticles agglomerated into aggregates. While spherical nanoaggregates were identified in samples prepared from Zn(CH3COO)2∙2H2O, flake-like structures were identified in samples synthesized from ZnCl2. Particle size determined by TEM was 107.03 ± 1.54 nm and 206.58 ± 1.86 nm for zinc acetate dihydrate and zinc chloride precursors respectively. ZnO nanoaggregate synthesized using zinc acetate as precursor gave higher antibacterial activity than its counterpart, zinc chloride with K. pneumonia recording the highest inhibition zone of 2.08 ± 0.03 mm (67.53%) whereas S. aureus recorded the least inhibition zone of 1.06 ± 0.14 mm (34.75%) for ZnO nanoaggregate from zinc chloride precursor. Also, antibacterial activity increases with increasing concentration of the extract in general. However, A. baumannii, E. aquaticum, and K. pneumoniae did not follow the continuity trend with regards to the 250 ppm and 500 ppm concentrations. Conclusion Biosynthesis of ZnO nanoaggregates using aqueous extract of A. occidentale leaf from zinc acetate dihydrate and zinc chloride as precursors was successful with the formation of nanospheres and nanoflakes. The study suggested that A. occidentale sp. could be an alternative source for the production of ZnO nanoparticles and are efficient antibacterial compounds against both Gram +ve and Gram −ve microbes with its promising effect against infectious bacteria.

Mask Design Platform for Zinc Oxide Nanowire Growth

2013 ◽  
Vol 795 ◽  
pp. 393-396 ◽  
Author(s):  
R. Haarindra Prasad ◽  
U. Hashim ◽  
Tijjani Adam
Keyword(s):  
Zinc Oxide ◽  
Vertical Direction ◽  
Critical Dimension ◽  
Nanowire Growth ◽  
Silicon Sample ◽  
Vapor Liquid Solid Mechanism ◽  
Mask Design ◽  
Oxide Deposition ◽  
Zinc Oxide Nanowire ◽  
Chrome Mask

This paper mainly represent the simple and effective method to design the chrome mask for patterning theplatformfor zinc oxide nanowire growth. The most essential aspect that need to be considered in designing the chrome mask is the critical dimension of the mask. Hence, the mask is design by usingAutoCADsoftware to design the desired size and length dimension of the mask. Fabrication and development of zinc oxide consist of a series of major steps. The silicon sample will be initially cleaned, followed by zinc oxide deposition and the zinc oxide nanowire will be growth in vertical direction by using VLS (Vapor-Liquid-Solid) mechanism. The nanowire will be patterned by using the chrome mask which design the platform of the nanowire formation. The initial design of the chrome mask is measured and compared to the fabricated chrome mask to detect the efficiency and the accuracy of the pattern transfer process. Our aim is to develop a comprehensive platform for prominent zinc oxide nanowire growth leading to novel and efficient functional of zinc oxide nanowire devices.

A Solution Processed ZnO Thin Film

2012 ◽  
Vol 239-240 ◽  
pp. 1585-1588 ◽  
Author(s):  
Yuh Chung Hu ◽  
David T.W. Lin ◽  
Hai Lin Lee ◽  
Pei Zen Chang
Keyword(s):  
Thin Film ◽  
Aqueous Solution ◽  
Zinc Oxide ◽  
Low Cost ◽  
Zinc Acetate Dihydrate ◽  
Oxide Thin Film ◽  
Zno Thin Film ◽  
Acetate Dihydrate ◽  
Zinc Oxide Thin Film ◽  
Environmentally Friendly Process

The effect of Zinc-Oxide (ZnO) thin film annealed in different ambiences is presented. To achieve low cost and environmentally friendly process, ZnO aqueous solution is synthesized by dissolving zinc acetate dihydrate in deionized water directly. Zinc oxide aqueous solution of high solubility and stability is presented. High quality and dense Zinc oxide thin film is formed by spin coating. Annealing temperatures are in the range of 300 °C~500 °C, and annealing ambiences of both air and N2 are discussed.

Enthalpy of formation of zinc acetate dihydrate

2011 ◽  
Vol 43 (6) ◽  
pp. 980-982 ◽  
Author(s):  
James T. Hughes ◽  
Alexandra Navrotsky
Keyword(s):  
Enthalpy Of Formation ◽  
Zinc Acetate ◽  
Zinc Acetate Dihydrate ◽  
Acetate Dihydrate
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