Growth mechanisms of one-dimensional zinc oxide hierarchical structures

Here we report on the growth and evolution of ZnO nanowires grown from ZnO nanopowder as a source material using a horizontal muffle furnace. The shape evolution has been studied with variation in growth temperature and zinc vapor pressure. The structural analysis on these nanostructures shows c-axis oriented aligned growth. Scanning electron microscopy imaging of these nanostructures revealed the shape evolution from nanowires to nanoribbons and then to nanorods as the growth temperature increases from 650°C to 870°C. At 650°C, only vertical nanowires have been observed and with increase in growth temperature nanowires transform to nanoribbons and then to nanorods at 870°C. And we also observed simultaneous growth of nanorods and nanoribbons under a specific growth condition. We believe that these nanowires and nanorods were formed by vapor–liquid–solid growth mechanism (catalyst-mediated growth), whereas nanoribbons were grown by vapor–solid growth mechanism (without the aid of a metal catalyst). We observed simultaneous occurrence of vapor–liquid–solid and vapor–solid growth mechanisms at a particular growth temperature. These ZnO nanowires exhibit bound exciton related UV emission at ~379 nm, and defect-emission band in the visible region. Possible growth mechanism, shape evolution, and simultaneous growth of two types of one-dimensional ZnO nanostructures under the same growth condition are discussed.

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SIMULATION OF SINGLE CRYSTAL ONE DIMENSIONAL ZnO RODS ARRAY GROWTH PROCESS

10.29003/m2497.mmmsec-2021/150-151 ◽

2021 ◽

Author(s):

Andrey Sharapov ◽

Igor Matyushkin

Keyword(s):

Zinc Oxide ◽

Single Crystal ◽

Gas Phase ◽

Growth Process ◽

Silicon Oxide ◽

Phase Growth ◽

One Dimensional ◽

Zno Rods

In this work, the formation of zinc oxide arrows by gas-phase growth on the surface of silicon oxide is simulated.

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Synthesis and Application of One-Dimensional La(OH)3Nanostructures: An Overview

Journal of Chemistry ◽

10.1155/2014/305986 ◽

2014 ◽

Vol 2014 ◽

pp. 1-9 ◽

Cited By ~ 4

Author(s):

Xiang Xiao ◽

Yu Huang ◽

Fan Dong

Keyword(s):

Physical Properties ◽

Electronic Structures ◽

Growth Mechanisms ◽

One Dimensional ◽

New Directions ◽

Potential Applications ◽

Transition Modes ◽

Semiconductor Nanomaterials ◽

Comprehensive Introduction ◽

Solvothermal Methods

One-dimensional (1D) semiconductor nanomaterials are of particular importance owing to their unique properties and potential applications. This review attempts to provide a comprehensive introduction of 1D La(OH)3nanostructures including nanowires, nanoneedles, nanobelts, and nanorods. Firstly, various strategies developed to fabricate the 1D La(OH)3nanostructures are discussed, such as precipitation and composite-hydroxide-mediated, hydrothermal, and solvothermal methods, accompanying the description of the corresponding growth mechanisms. Then, the unique properties such as novel physical properties of 1D La(OH)3nanostructures resulting from their unique electronic structures and numerous transition modes involving the 4f shells of these ions are represented in detail. Also, the wide applications in photocatalyst, capacitors, and photoluminescence based on the unique properties are discussed. Finally, the paper ends with a summary and some perspectives on the challenges and new directions in this emerging area.

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Synthesis and Properties of SnO2 One-Dimensional Nanomaterials on Pt-Coated Substrates

Materials Science Forum ◽

10.4028/www.scientific.net/msf.517.21 ◽

2006 ◽

Vol 517 ◽

pp. 21-24

Author(s):

Hyoun Woo Kim ◽

S.H. Shim

Keyword(s):

Electron Microscopy ◽

Thermal Evaporation ◽

Light Emission ◽

Growth Mechanisms ◽

X Ray Diffraction ◽

Rutile Structure ◽

One Dimensional ◽

X Ray ◽

Transmission Electron ◽

Tetragonal Rutile Structure

We have synthesized the belt-like structures of tin oxide (SnO2) by carrying out the thermal evaporation of solid Sn powders. We have analyzed the samples with scanning electron microscopy, X-ray diffraction, transmission electron microscopy and photoluminescence (PL). The obtained nanobelts were single crystalline with a tetragonal rutile structure. PL spectrum exhibited the visible light emission. We have discussed the possible growth mechanisms.

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