Controlling the extremely preferred orientation texturing of sol–gel derived ZnO thin films with sol and heat treatment parameters

Ebrahimifard, Reza; Abdizadeh, Hossein; Golobostanfard, Mohammad Reza

doi:10.1007/s10971-019-05157-2

Cited by 20 publications

(11 citation statements)

References 25 publications

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“…The intensities of the diffraction peaks are all comparable even with increasing Bi concentration, indicating that the amount of the Bi dopant in the lattice is not sufficient to have any effect on the overall crystal structure of the ZnO host. The intensity of the (002) peak is comparable to that of (100), suggesting growth along the planar axis, [22] which is in good accord with the observed morphology (Figure 1).…”

Section: Resultssupporting

confidence: 83%

Structural and Optical Properties of Bismuth-doped ZnO Nanoparticles Synthesized by Co-precipitation

Sermsrithong

Jaidaew

Promjantuk

et al. 2022

IJE

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Bismuth-doped zinc oxide (ZnO) nanoparticles can serve as efficient photocatalysts for various reactions. Herein, we synthesized and discussed the growth mechanisms of Bi-doped ZnO nanoflakes using co-precipitation with Bi concentrations ranging from 0 to 3 %. The resulting ZnO were hexagonal nanosheets with diameters ranging from 80 nm (ZnO) to 200 nm (ZnO: Bi 3%). The dominant crystal structure matches hexagonal wurtzite with a small presence of Bi2O3 diffraction peaks. The estimated crystallite sizes range from ~ 33 nm to ~ 45 nm, indicating multiple crystalline regions in each nanoflake. Nevertheless, as sheet resistance monotonically decreases with the Bi concentration, the higher number of grain boundaries likely has a lower effect on the conductivity compared to an increase in free carriers and larger grain size in the samples with higher Bi concentration. The bandgap decreases from ~ 3.13 eV to ~ 2.96 eV, likely due to the shrinkage effect from electron-electron or electron-impurity interaction that lowers the conduction band of ZnO.

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Section: Resultssupporting

confidence: 83%

Structural and Optical Properties of Bismuth-doped ZnO Nanoparticles Synthesized by Co-precipitation

Sermsrithong

Jaidaew

Promjantuk

et al. 2022

IJE

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“…It is possible to influence the growth rate in a certain crystallographic direction. It allows to obtain thin ZnO films with preferential orientation in the structure [ 22 , 23 ], and to apply new methods for the formation of nanopatterns [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Self-Organization Effects of Thin ZnO Layers on the Surface of Porous Silicon by Formation of Energetically Stable Nanostructures

et al. 2023

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The formation of complex surface morphology of a multilayer structure, the processes of which are based on quantum phenomena, is a promising domain of the research. A hierarchy of pore of various sizes was determined in the initial sample of porous silicon by the atomic force microscopy. After film deposition by spray pyrolysis, ZnO nanoclusters regularly distributed over the sample surface were formed. Using the electron paramagnetic resonance (EPR) method it was determined that the localization of paramagnetic centers occurs more efficiently as a result of the ZnO deposition. An increase in the number of deposited layers, leads to a decrease in the paramagnetic center relaxation time, which is probably connected with the formation of ZnO nanocrystals with energetically stable properties. The nucleation and formation of nanocrystals is associated with the interaction of particles with an uncompensated charge. There is no single approach to determine the mechanism of this process. By the EPR method supplemented with the signal cyclic saturation, spectral manifestations from individual centers were effectively separated. Based on electron paramagnetic resonance and photoluminescence studies it was revealed that the main transitions between energy levels are due to oxygen vacancies and excitons.

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“…In thin films, polycrystalline ZnO can produce a piezoelectric response when textured (i.e. grains are aligned in a common direction) [17][18][19][20][21][22] as the preferential orientation of the c-axis produces a collective response. However, untextured polycrystalline ZnO and other untextured polycrystalline piezoelectric films are generally considered to have no piezoelectric response as the random orientation of each grain results in a net-zero change in electric displacement.…”

Section: Introductionmentioning

confidence: 99%

Microstructure-driven mechanical and electromechanical phenomena in additively manufactured nanocrystalline zinc oxide

Gallivan,

Aitken,

Chamoun-Farah

et al. 2023

Nanotechnology

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Advances in nanoscale additive manufacturing (AM) offer great opportunities to expand nanotechnologies; however, the size effects in these printed remain largely unexplored. Using both in-situ nanomechanical and electrical experiments and MD simulations, this study investigates additively manufactured nano-architected nanocrystalline ZnO (nc-ZnO) with ~7 nm grains and dimensions spanning 0.25-4 µm. These nano-scale ceramics are fabricated through printing and subsequent burning of metal ion-containing hydrogels to produce oxide structures. Electromechanical behavior is shown to result from random ordering in the microstructure and can be modeled through a statistical treatment. A size effect in the failure behavior of AM nc-ZnO is also observed and characterized by the changes in deformation behavior and suppression of brittle failure. MD simulations provide insights to the role of grain boundaries and grain boundary plasticity on both electromechanical behavior and failure mechanisms in nc-ZnO. The frameworks developed in this paper extend to other AM nanocrystalline materials and provide quantification of microstructurally-drive limitations to precision in materials property design.

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Controlling the extremely preferred orientation texturing of sol–gel derived ZnO thin films with sol and heat treatment parameters

Cited by 20 publications

References 25 publications

Structural and Optical Properties of Bismuth-doped ZnO Nanoparticles Synthesized by Co-precipitation

Structural and Optical Properties of Bismuth-doped ZnO Nanoparticles Synthesized by Co-precipitation

Self-Organization Effects of Thin ZnO Layers on the Surface of Porous Silicon by Formation of Energetically Stable Nanostructures

Microstructure-driven mechanical and electromechanical phenomena in additively manufactured nanocrystalline zinc oxide

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