Preparation and properties of ZnO nanostructures by electrochemical anodization method

He, S.; Zheng, Maojun; Yao, Lujun; Yuan, Xiangwei; Li, Mei; i, L; Shen, Wei

doi:10.1016/j.apsusc.2009.10.104

Cited by 119 publications

(62 citation statements)

References 48 publications

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“…From the values of the contact angle and the SEM images, we can observe that the value of the contact angle is directly correlated with the surface structure of the film. The reason of the increment of contact angel has been explicated in terms of the quantity of air spaces observed in the nanoscale in an earlier work [11,15]. The trapped air pressure balances the gravity of the water droplet, and the surface tension of the water tries to keep the shape of the droplet spherical.…”

Section: Contact Angle Measurementmentioning

confidence: 99%

Antibacterial activity of ZnO films prepared by anodizing

2016

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In the present work, anodizing of zinc foil was investigated in NaOH and oxalic acid electrolytes under the influence of different concentrations of the electrolyte, while temperature and voltage were kept constant. Anodized zinc plates were characterized using scanning electron microscope (SEM), UV-Vis diffuse reflectance spectroscopy (DRS UV-Vis), and X-ray diffraction (XRD) analysis. Characterization of anodized Zn plates using SEM showed that their morphology was significantly influenced by the type and concentration of anodizing electrolyte. XRD analysis indicated that the ZnO thin films were of hexagonal wurtzite structures. From contact angle measurements, it has been observed that the contact angle of anodized film is higher than that of pure zinc foil. Antibacterial results suggest that the parent zinc foil did not show the antibiotic activity, but the anodized zinc oxide is effective both toward Gram-positive bacteria and Gramnegative bacteria.

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Section: Contact Angle Measurementmentioning

confidence: 99%

Antibacterial activity of ZnO films prepared by anodizing

2016

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“…Different synthesis methods, such as solid-state reaction [18], coprecipitation [19][20][21], sol-gel [22][23][24], hydrothermal [25][26][27], pyrosol [28,29], microemulsion [30][31][32], combustion [13], and electrochemical methods [33,34] have been used in order to obtain the europium-doped zinc oxide nanoparticles. The precipitation/coprecipitation method, as compared to other chemical or physical methods, is an inexpensive method which allows the synthesis of a wide range of nanoparticles with different and controlled sizes and shapes [19,20,[35][36][37].…”

Section: Introductionmentioning

confidence: 99%

A valence states approach for luminescence enhancement by low dopant concentration in Eu-doped ZnO nanoparticles

et al. 2015

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The paper presents a simple, reproducible, controllable, and direct wet chemical synthesis method for Zn 1-x Eu x O nanoparticles. The full understanding of decomposition mechanism of the as-obtained oxalate precipitate was achieved based on the thermal analysis correlated with the evolved gas analysis and FTIR spectroscopy. The structure, morphology, and optical luminescent properties of the Zn 1-x Eu x O nanoparticles have been investigated by X-ray diffraction, Raman spectroscopy, HRTEM, SAED, XPS, and PL. The XRD studies reveal the formation of a hexagonal wurtzite-type structure. The presence of Eu 2 O 3 cubic structure can be observed up to 0.5 mol% Eu, suggesting that the solubility of the divalent or trivalent Eu into the ZnO lattice is limited. The formation of Eu 2 O 3 secondary phase at higher Eu concentration is sustained by Raman spectroscopy and XPS, as well. The TEM investigations of the Eu-doped ZnO samples illustrate the presence of aggregates with different shapes and dimensions formed by agglomerated spherical and polyhedral nanoparticles with sizes ranging from 20 to 120 nm. The effect of europium concentration on the structural and morphological characteristics, as well as on the luminescent properties was studied with special emphasis on the europium chemical states-Eu 2? and Eu 3? . The PL measurements sustain the presence of both divalent and trivalent europium ions into the ZnO host lattice and, at the same time, an increase of its defects density induced by the dopant presence.

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“…ZnO nanostructures have been prepared by various experimental techniques such as a thermal vapor transport method (Cai et al 2011), spray pyrolysis (Dedova et al 2007b;Krunks et al 2008), chemical vapour deposition (CVD), electrochemical deposition (He et al 2010), pulsed laser deposition (PLD) (Valerini et al 2008), sol-gel (Bahadur et al 2007) etc. Among these techniques, spray pyrolysis is a simple, convenient, lowcost technique for large area coatings (Ravichandran & Philominathan 2008a).…”

Section: Introductionmentioning

confidence: 99%

Fabrication of ZnO nanorods by simplified spray pyrolysis

Yılmaz¹,

Turgut²,

Aydın³

et al. 2015

Bitlis Eren University Journal of Science and Technology

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ZnO layers were deposited by a simple and cost-effective spray pyrolysis using zinc chloride aqueous solutions on glass substrates at 600 °C. The structural properties of nanorods were characterized by Xray diffraction (XRD), scanning electron microscopy (SEM). XRD studies showed that the films were at polycrystalline form and oriented along (002) direction preferentially and other observed orientations were (102), (103) and (004). The standard and the calculated lattice constants are in consistence. It was also observed that the deposited films were ZnO with hexagonal structure andsurfaces of the films are found to be nonhomogeneous with hexagonal shaped rods.

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Preparation and properties of ZnO nanostructures by electrochemical anodization method

Cited by 119 publications

References 48 publications

Antibacterial activity of ZnO films prepared by anodizing

Antibacterial activity of ZnO films prepared by anodizing

A valence states approach for luminescence enhancement by low dopant concentration in Eu-doped ZnO nanoparticles

Fabrication of ZnO nanorods by simplified spray pyrolysis

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