The Growth Mechanism of Quasi One-Dimensional ZnO Nanostructures Synthesized by Carbon Reduction without Catalyst

2007 ◽  
pp. 2209-2213
Author(s):  
W.C. Liu ◽  
Wei Cai
Keyword(s):  
Growth Mechanism ◽  
Zno Nanostructures ◽  
One Dimensional ◽  
Carbon Reduction

SHAPE EVOLUTION IN ONE-DIMENSIONAL ZnO NANOSTRUCTURES GROWN FROM ZnO NANOPOWDER SOURCE: VAPOR–LIQUID–SOLID VERSUS VAPOR–SOLID GROWTH MECHANISMS

2011 ◽  
Vol 10 (01n02) ◽  
pp. 75-79 ◽  
Author(s):  
SOUMEN DHARA ◽  
P. K. GIRI
Keyword(s):  
Growth Mechanism ◽  
Growth Temperature ◽  
Shape Evolution ◽  
Zno Nanostructures ◽  
Growth Mechanisms ◽  
Vapor Liquid Solid ◽  
One Dimensional ◽  
Zno Nanopowder ◽  
Simultaneous Growth ◽  
Vapor Liquid

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.

The Growth Mechanism of Quasi One-Dimensional ZnO Nanostructures Synthesized by Carbon Reduction without Catalyst

2007 ◽  
Vol 546-549 ◽  
pp. 2209-2213
Author(s):  
W.C. Liu ◽  
Wei Cai
Keyword(s):  
Zinc Oxide ◽  
Xrd Analysis ◽  
Structure Characterization ◽  
Zno Nanostructures ◽  
One Dimensional ◽  
X Ray ◽  
Carbon Reduction ◽  
Transmission Electron ◽  
Solid Liquid ◽  
One Dimensional Nanostructures

In order to obtain quasi one-dimensional nanostructures, various methods have been developed for the preparation and many mechanisms have been put forward such as VS (vapor-solid), VLS (vapor-liquid-solid), SLS (solid-liquid-solid), and so on. In present study, the zinc oxide one-dimensional nanostructures synthesized by carbon reduction route without catalyst isn’t controlled by the conventional VLS mechanism because that there is no droplet at the growth end of the nanostructures. By using a variety of growth times and the ratios of the zinc oxide and the activated carbon, it can be deduced that the liquid zinc island formed firstly and then the ZnO nanostructures growth on them. The morphologies and microstructures of samples were characterized by scanning electron microscope (SEM) observations, X-ray diffraction (XRD) analysis, transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS). The structure characterization confirms that all the grown one-dimensional materials are hexagonal wurtzite ZnO.

Hydrothermal synthesis of a 3D double-sided comb-like ZnO nanostructure and its growth mechanism analysis

2016 ◽  
Vol 52 (53) ◽  
pp. 8231-8234 ◽  
Author(s):  
Wenqiang Li ◽  
Shiyong Gao ◽  
Lin Li ◽  
Shujie Jiao ◽  
Hongtao Li ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Growth Mechanism ◽  
Self Assembly ◽  
Three Dimensional ◽  
Mechanism Analysis ◽  
Two Dimensional ◽  
Zno Nanostructures ◽  
One Dimensional ◽  
Zno Nanostructure ◽  
2D Nanosheets

Self-assembly of two-dimensional (2D) nanosheets and one-dimensional (1D) nanorods into three-dimensional (3D) double-sided comb-like ZnO nanostructures has been successfully performed on Si and ITO substrates.

Review on one-dimensional ZnO nanostructures for electron field emitters

2013 ◽  
Vol 6 (4) ◽  
pp. 386-412 ◽  
Author(s):  
Meirong Sui ◽  
Ping Gong ◽  
Xiuquan Gu
Keyword(s):  
Zno Nanostructures ◽  
One Dimensional ◽  
Field Emitters ◽  
Electron Field

Growth and photocatalytic properties of one-dimensional ZnO nanostructures prepared by thermal evaporation

2009 ◽  
Vol 44 (10) ◽  
pp. 1954-1958 ◽  
Author(s):  
Hongwei Yan ◽  
Jianbo Hou ◽  
Zhengping Fu ◽  
Beifang Yang ◽  
Pinghua Yang ◽  
...  
Keyword(s):  
Thermal Evaporation ◽  
Photocatalytic Properties ◽  
Zno Nanostructures ◽  
One Dimensional

Catalytic growth of one-dimensional single-crystalline ZnO nanostructures on glass substrate by vapor transport

2017 ◽  
Vol 43 (1) ◽  
pp. 610-616 ◽  
Author(s):  
Forat H. Alsultany ◽  
Z. Hassan ◽  
Naser M. Ahmed ◽  
Munirah Abdullah Almessiere
Keyword(s):  
Glass Substrate ◽  
Vapor Transport ◽  
Zno Nanostructures ◽  
Catalytic Growth ◽  
Single Crystalline ◽  
One Dimensional

Preparation and growth mechanism of one-dimensional NdB6 nanostructures: nanobelts, nanoawls, and nanotubes

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 41891-41896 ◽  
Author(s):  
Wei Han ◽  
Yanming Zhao ◽  
Qinghua Fan ◽  
Qidong Li
Keyword(s):  
Chemical Vapor Deposition ◽  
Growth Mechanism ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
One Dimensional

1D NdB6 nanostructures (nanobelts, nanoawls, and nanotubes) have been synthesized through a chemical vapor deposition (CVD) process with a self-catalyzed mechanism.

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