Structural and vibrational properties of ZnO nanoparticles synthesized by the chemical precipitation method

Sahai, Anshuman; Goswami, Navendu

doi:10.1016/j.physe.2013.12.009

Cited by 122 publications

(46 citation statements)

References 29 publications

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“…Raman spectrum of ZnO powder (Fig. 7d) is characterized by a strong band at about 438 cm −1 corresponding to the E 2 mode, which is the strongest Raman mode in the wurtzite crystal structure of ZnO [16]. The Raman band at about 329 cm −1 is assigned to acoustic mode, while the weak Raman bands at about 381 cm −1 and 410 cm −1 are assigned to overtone of A 1 and E 1 transverse optical phonons [17].…”

Section: Resultsmentioning

confidence: 98%

Synthesis and characterization of Al2O3/ZnO coatings formed by plasma electrolytic oxidation

Stojadinović

Tadić

Radić

et al. 2015

Surface and Coatings Technology

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Section: Resultsmentioning

confidence: 98%

Synthesis and characterization of Al2O3/ZnO coatings formed by plasma electrolytic oxidation

Stojadinović

Tadić

Radić

et al. 2015

Surface and Coatings Technology

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“…As it mentioned, traditionally to determine CSD size in ZnO, authors use Scherrer equation [18,21,22]. Despite that, to estimation of substructural characteristics, we use the method of Williamson-Hall method.…”

Section: Resultsmentioning

confidence: 99%

“…Traditionally, determining of the crystallites size is carried out using electron microscopy or X-ray diffraction with the help of Scherrer equation [18,21,22]. This leads to some overstatement of the results, because the authors neglected the presence of micro strain in the films.…”

Section: /2cosmentioning

confidence: 99%

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Growth Time Effect on the Structural and Sub-Structural Properties of Chemically-Deposited ZnO Films

Berestok

Kurbatov

Opanasyuk

et al. 2015

AMR

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Abstract. Nanostructured ZnO films are obtained by chemical bath deposition from zinc nitrate, hexamethylenetetramine and ammonia. The evolution of the structural and sub-structural properties of the films is characterized using high resolution scanning electron microscopy (SEM) and X-ray diffraction analysis. In particular, we detail here the influence of condensation time on the crystal phase, texture quality, lattice constants, grain size, coherent scattering domain size (CSD), microstrain, stress and concentration of dislocations. Obtained condensates have the wurtzite structure with lattice parameters in the range a = 0.3248-0.3254 nm and c = 0.5206-0.5214 nm, depending on the condensation time. The grain size and microstrain in the direction perpendicular to the crystallographic planes (002) are in the range L ~ 26-42 nm and ε ~ (0.59-3.09)⋅10 -3 , respectively. Furthermore, the effects of deposition time on microstrain, stress and concentration of dislocations in the layers is established. By adjusting the condensation time, we are able to produce ZnO films with controlled structural properties: from nanorods to continuous nanostructured films.

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“…In general, ZnO nanostructures have two emission bands, the relatively weak and narrow ultra violet (UV) emission band and the much stronger, broader emission band located at around 400-600 nm. 47 Several works both theoretically and experimentally have reported the mechanism behind the origin of the broad visible emission from ZnO. 48 The origin of the visible emission is due to the recombination of a photogenerated electron from a shallow level which is very close to the conduction band with the deep traps in the single ionized oxygen vacancy sites and/or the single negatively charged interstitial oxygen ions.…”

Section: Optical Propertiesmentioning

confidence: 99%

Microstructure, vibrational and visible emission properties of low frequency ultrasound (42 kHz) assisted ZnO nanostructures

et al. 2016

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Size and shape tuneable ZnO nanostructures were prepared by a low frequency ultrasound (42 kHz) route using various organic solvents as the reaction media. The crystalline nature, lattice parameters and microstructural parameters such as microstrain, stress and energy density of the prepared ZnO nanostructures were revealed through X-ray diffraction (XRD) analysis. The organic solvents influenced the size and morphology of the ZnO nanostructures, and interesting morphological changes involving a spherical to triangular shaped transition were observed. The visible emission properties and lattice vibrational characteristics of the nanostructures were drastically modified by the changes in size and shape. Raman spectral measurements revealed the presence of multiphonon processes in the ZnO nanostructures. The intensity of the visible emission band was found to vary with the size and morphology of the structures. The strongest visible emission band corresponded to the structure with the largest surface/volume ratio and could be attributed to surface oxygen vacancies. The control over the size and morphology of ZnO nanostructures has been presented as a means of determining the intensity of the visible emission band.

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Structural and vibrational properties of ZnO nanoparticles synthesized by the chemical precipitation method

Cited by 122 publications

References 29 publications

Synthesis and characterization of Al2O3/ZnO coatings formed by plasma electrolytic oxidation

Synthesis and characterization of Al2O3/ZnO coatings formed by plasma electrolytic oxidation

Growth Time Effect on the Structural and Sub-Structural Properties of Chemically-Deposited ZnO Films

Microstructure, vibrational and visible emission properties of low frequency ultrasound (42 kHz) assisted ZnO nanostructures

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