Low-temperature growth of ZnO nanostructure networks

Zhang, B. P.; Wakatsuki, K.; Bình, Nguyễn Thanh; Segawa, Y.; Usami, Noritaka

doi:10.1063/1.1759077

Cited by 48 publications

(49 citation statements)

References 16 publications

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“…Much effort has been devoted to the development of ZnO nanostructures by different methods. 1-D ZnO nanostructures have been synthesized by chemical vapor deposition (CVD) [10], thermal evaporation [11], pulsed laser deposition (PLD) [12]. All these methods need either complex procedures, sophisticated equipments or rigid experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

Low temperature hydrothermal growth and optical properties of ZnO nanorods

Yang¹,

Zheng

Zhai

et al. 2008

Cryst. Res. Technol.

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Well-faceted hexagonal ZnO nanorods have been synthesized by a simple hydrothermal method at relative low temperature (90°C) without any catalysts or templates. Zinc oxide (ZnO) nanorods were grown in an aqueous solution that contained Zinc chloride and ammonia (25%). Most of the ZnO nanorods show the perfect hexagonal cross section and well-faceted top and side surfaces. The diameter of ZnO nanorods decreased with the reaction time prolonging. The samples have been characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) measurement. XRD pattern confirmed that the as-prepared ZnO was the single-phase wurtzite structure formation. SEM results showed that the samples were rod textures. The surface-related optical properties have been investigated by photoluminescence (PL) spectrum and Raman spectrum. Photoluminescence measurements showed each spectrum consists of a weak band ultraviolet (UV) band and a relatively broad visible light emission peak for the samples grown at different time. It has been found that the green emission in Raman measurement may be related to surface states.

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Section: Introductionmentioning

confidence: 99%

Low temperature hydrothermal growth and optical properties of ZnO nanorods

Yang¹,

Zheng

Zhai

et al. 2008

Cryst. Res. Technol.

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“…Carbothermal reduction [10][11][12] and MOCVD technique [13,14] are widely used to synthesize this nanostructure. The former involves the reaction of ZnO powder with carbon, in which precise control of the Au catalyst thickness and a rather high growth temperature (875-1125 1C) are needed.…”

mentioning

confidence: 99%

On the formation of well-aligned ZnO nanowall networks by catalyst-free thermal evaporation method

Yin

Chen

Dai

et al. 2007

Journal of Crystal Growth

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Two-dimensional ZnO nanowall networks were grown on ZnO-coated silicon by thermal evaporation at low temperature without catalysts or additives. All of the results from scanning electronic spectroscope, X-ray diffraction and Raman scattering confirmed that the ZnO nanowalls were vertically aligned and c-axis oriented. The room-temperature photoluminescence spectra showed a dominated UV peak at 378 nm, and a much suppressed orange emission centered at $590 nm. This demonstrates fairly good crystal quality and optical properties of the product. A possible three-step, zinc vapor-controlled process was proposed to explain the growth of well-aligned ZnO nanowall networks. The pre-coated ZnO template layer plays a key role during the synthesis process, which guides the growth direction of the synthesized products. r

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“…The thickness of the ZnO nanotube array film was about 300 nm. The key step in this process is the formation of oriented nanowires and their self-assembly to hexagonal circle shapes, as reported by Zhang and colleagues [367]. The nanowires grew subsequently in nanotubular structure, although not all of the nanowire circle planes were parallel to the horizontal plane, due to the roughness of F-SnO 2 surface.…”

Section: Semiconductorsmentioning

confidence: 76%

Nanostructured Materials Synthesized Using Electrochemical Techniques

Oliveira

Freitas

Mattoso

et al. 2008

Nanostructured Materials in Electrochemistry

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The visualization and/or handling of atom clusters, or even individual atoms, has been achieved during the past 25 years. One of the most practical instruments for this purpose is the tunneling microscope, which was invented during the 1980s. On such a small scale, materials properties are not the same as those of a macroscopicsized substance. The first occasion on which a scientist proposed atom handling was in 1959, when Professor Richard Feynman [1], during a lecture at the California Institute Technology, suggested that in the near future engineers would be able to take atoms and place them exactly where they wanted to, without -of courseinfringing the laws of Nature. Today, Professor Feynmans lecture, which was entitled There is Plenty of Room at the Bottom, is considered a milestone of the current technological and scientific era.We can define nanoscience as the study of the phenomena and handling of structures on the atomic, molecular and macromolecular scale, where at least one dimension is significantly less than the others. And nanotechnology includes the design, characterization, and production of devices and systems on a nanometer scale. This definition of nanotechnology is wide-ranging, it is not a specific technology, all of the techniques based on physics, chemistry, biology, materials science and engineering -and/or using computers -leading to the development of materials and tools in such a way that the common point among them is the reduced dimension in which they operate. Among these applications are: increased storage and processing capacity for computers; the creation of new mechanisms for drug delivery; and the production of materials which are both lighter and more resistant than metals and plastics. Additional benefits of nanotechnology developments include energy saving, environmental protection, and the more efficient use of increasingly scarce raw materials.Today, these new investigations into material fabrication are focused mainly on nanostructured devices or, at least, microdevices. The most-often used technique for j117 Nanostructured Materials in Electrochemistry. Edited by Ali Eftekhari

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Low-temperature growth of ZnO nanostructure networks

Cited by 48 publications

References 16 publications

Low temperature hydrothermal growth and optical properties of ZnO nanorods

Low temperature hydrothermal growth and optical properties of ZnO nanorods

On the formation of well-aligned ZnO nanowall networks by catalyst-free thermal evaporation method

Nanostructured Materials Synthesized Using Electrochemical Techniques

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