Asymmetric twinning crystals of Zinc oxide formed in a hydrothermal process

Xu, Haiyan; Wang, Hao; Zhang, Yongcai; Wang, Shu; Zhu, Ming‐Qiang; Yan, Hui

doi:10.1002/crat.200310053

Cited by 24 publications

(16 citation statements)

References 13 publications

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“…LiOH, NaOH, etc) [28]. There are reports of modifications of the ZAH dehydration or dissolution and subsequent condensation for the growth of ZnO nanostructures [29][30][31]. The search for primary clusters to serve as building blocks for various nanostructures has been going on for quite some time.…”

Section: Zah Based Sol-gel Synthesis Of Zno Nanostructuresmentioning

confidence: 99%

Hydrothermal growth of ZnO nanostructures

Baruah

Dutta

2009

Science and Technology of Advanced Materials

1,020

492

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One-dimensional nanostructures exhibit interesting electronic and optical properties due to their low dimensionality leading to quantum confinement effects. ZnO has received lot of attention as a nanostructured material because of unique properties rendering it suitable for various applications. Amongst the different methods of synthesis of ZnO nanostructures, the hydrothermal method is attractive for its simplicity and environment friendly conditions. This review summarizes the conditions leading to the growth of different ZnO nanostructures using hydrothermal technique. Doping of ZnO nanostructures through hydrothermal method are also highlighted.

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Section: Zah Based Sol-gel Synthesis Of Zno Nanostructuresmentioning

confidence: 99%

Hydrothermal growth of ZnO nanostructures

Baruah

Dutta

2009

Science and Technology of Advanced Materials

1,020

492

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“…Normally aqueous solutions are used, and the process is then referred to as a hydrothermal growth process. Some of the solution-phase synthesis processes include a zinc acetate hydrate (ZAH)-derived nanocolloidal sol-gel route [12], ZAH in an alcoholic solution with sodium hydroxide (NaOH) or tetra methyl ammonium hydroxide (TMAH) [13][14][15], template-assisted growth [16], spray pyrolysis [17,18] and electrophoresis [19] for fabricating nanostructured thin films.…”

Section: Introductionmentioning

confidence: 99%

Growth of ZnO nanowires on nonwoven polyethylene fibers

Baruah

Thanachayanont

Dutta

2008

Science and Technology of Advanced Materials

122

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We report the growth of ZnO nanowires on nonwoven polyethylene fibers using a simple hydrothermal method at a temperature below the boiling point of water. The ZnO nanowires were grown from seed ZnO nanoparticles affixed onto the fibers. The seed ZnO nanoparticles, with diameters of about 6-7 nm, were synthesized in isopropanol by reducing zinc acetate hydrate with sodium hydroxide. The growth process was carried out in a sealed chemical bath containing an equimolar solution of zinc nitrate hexahydrate and hexamethylene tetramine at a temperature of 95 • C over a period of up to 20 h. The thickness and length of the nanowires can be controlled by using different concentrations of the starting reactants and growth durations. A 0.5 mM chemical bath yielded nanowires with an average diameter of around 50 nm, while a 25 mM bath resulted in wires with a thickness of up to about 1 µm. The length of the wires depends both on the concentration of the precursor solution as well as the growth duration, and in 20 h, nanowires as long as 10 µm can be grown. The nonwoven mesh of polyethylene fibers covered with ZnO nanowires can be used for novel applications such as water treatment by degrading pollutants by photocatalysis. Photocatalysis tests carried out on standard test contaminants revealed that the polyethylene fibers with ZnO nanowires grown on them could accelerate the photocatalytic degradation process by a factor of 3.

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“…2 Very recently, we reported that annealing at 900°C could completely transform the ZnO nanorods with diameters of ϳ10 nm and lengths of ϳ100 nm into twinning morphologies comprising two quasispheres. 8 While twinning is a common feature in jointed ZnO nanostructures, [9][10][11][12][13][14][15] especially in that prepared by thermal evaporation, [12][13][14][15] the present work reveals that the annealed products of ZnO nanorods are indeed twinning free. The lattice images of two jointed grains show the same plane, but the alignment is random.…”

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confidence: 52%

ZnO quasibicrystals formed by thermal annealing

Yan

Zhu

Chen

2008

Applied Physics Letters

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Atmospheric annealing could melt the nanorods with diameters of ϳ10 nm at ϳ600°C, and completely change them into jointed grains at 610°C. Most of the jointed grains are quasibicrystals with nearly symmetric morphologies but twinning free structures, much different from the commonly observed ZnO twinning crystals. The quasibicrystals would also be formed when annealing ZnO nanoparticles, which may be a common thermal behavior of ZnO low dimensional nanostructures and should be considered when preparing ZnO nanoscale devices and ceramics.

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Asymmetric twinning crystals of Zinc oxide formed in a hydrothermal process

Cited by 24 publications

References 13 publications

Hydrothermal growth of ZnO nanostructures

Hydrothermal growth of ZnO nanostructures

Growth of ZnO nanowires on nonwoven polyethylene fibers

ZnO quasibicrystals formed by thermal annealing

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