Mechanism of growth of ZnO single crystals from hydrothermal alkali solutions

Demianets, L. N.; Костомаров, Д. В.; Kuz'mina, I. P.; Pushko, S. V.

doi:10.1134/1.1529962

Cited by 97 publications

(70 citation statements)

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“…A wide band gap (∼ 3.3 eV at room temperature) [33] compound semiconductor, ZnO demonstrates such properties as piezoelectricity, luminescence [33,34] and thermoelectricity [21]. Although ZnO is available as single crystals [35][36][37], polycrystalline ZnO is also important for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Hybrid processing and anisotropic sintering shrinkage in textured ZnO ceramics

Keskinbora¹,

Suzuki²,

Özer³

et al. 2010

Science and Technology of Advanced Materials

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We have studied the combined effects of the templated grain growth and magnetic alignment processes on sintering, anisotropic sintering shrinkage, microstructure development and texture in ZnO ceramics. Suspensions of 0-10 vol % ZnO template particles were slip cast in a 12 T rotating magnetic field. Sintering and texture characteristics were investigated via thermomechanical analysis and electron backscatter diffraction, respectively. Sintering as well as texture characteristics depend on template concentration. For the studied ZnO system, there is a critical template concentration (2 vol % in this study) above which densification is limited by the templates owing to constrained sintering. Below this limit, the densification is enhanced and the anisotropic shrinkage is reduced, which is attributed to densifying characteristics of the templates.

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Section: Introductionmentioning

confidence: 99%

Hybrid processing and anisotropic sintering shrinkage in textured ZnO ceramics

Keskinbora¹,

Suzuki²,

Özer³

et al. 2010

Science and Technology of Advanced Materials

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“…Supersaturation allows a growth zone to be attained [58]. KOH is thought to be preferable to NaOH, because K + has a larger ion radius and thus a lower probability of incorporation into the ZnO lattice [58,59]. Furthermore, it has been suggested that Na + is attracted by the OH − around the nanocrystal and forms a virtual capping layer, thus, inhibiting the nanocrystal growth [60].…”

Section: Growth In General Alkaline Solutionsmentioning

confidence: 99%

“…Generally speaking, the solubility of ZnO in an alkali solution increases with the alkali concentration and temperature. Supersaturation allows a growth zone to be attained [58]. KOH is thought to be preferable to NaOH, because K + has a larger ion radius and thus a lower probability of incorporation into the ZnO lattice [58,59].…”

Section: Growth In General Alkaline Solutionsmentioning

confidence: 99%

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One-dimensional ZnO nanostructures: Solution growth and functional properties

2011

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One-dimensional (1D) ZnO nanostructures have been studied intensively and extensively over the last decade not only for their remarkable chemical and physical properties, but also for their current and future diverse technological applications. This article gives a comprehensive overview of the progress that has been made within the context of 1D ZnO nanostructures synthesized via wet chemical methods. We will cover the synthetic methodologies and corresponding growth mechanisms, different structures, doping and alloying, positioncontrolled growth on substrates, and finally, their functional properties as catalysts, hydrophobic surfaces, sensors, and in nanoelectronic, optical, optoelectronic, and energy harvesting devices.

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“…This then explained 1D nanostructure fashion in solutions. An alkaline solution is necessary for the growth of ZnO nanostructures because normally divalent metal ions do not hydrolyze in acidic media [159][160] and can also be derived in a number of ways: The frequently explored alkali compounds are NaOH and KOH. In general, the ZnO solubility in an alkali solution has been reported to increase with the concentration of alkali and temperature which under a necessary condition of supersaturation, the attainment of growth zone is possible [156].…”

Section: Zno Growth In General Alkaline Solutionsmentioning

confidence: 99%