Three-Dimensional Architectures of (NH4,Na)3AlF6Solid Solution: Synthesis, Shape Evolution, and Growth Mechanism

2010 ◽  
Vol 10 (9) ◽  
pp. 3869-3878 ◽  
Author(s):  
Cheng-Fa Mu ◽  
Qi-Zhi Yao ◽  
Gen-Tao Zhou ◽  
Sheng-Quan Fu
Keyword(s):  
Growth Mechanism ◽  
Three Dimensional ◽  
Shape Evolution ◽  
Solution Synthesis

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.

Calcite crystallization in the cement system: morphological diversity, growth mechanism and shape evolution

2018 ◽  
Vol 20 (20) ◽  
pp. 14174-14181 ◽  
Author(s):  
Jinyang Jiang ◽  
Qi Zheng ◽  
Dongshuai Hou ◽  
Yiru Yan ◽  
Heng Chen ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
Morphological Diversity ◽  
Low Ph ◽  
Shape Evolution ◽  
Engineering Construction ◽  
Cement System

Carbonation plays an indispensable role in engineering construction, embracing mineralization, CO2 sequestration and low pH induced corrosion, but the essential mechanism of carbonation occurring in calcium silicate hydrate or portlandite can hardly be interpreted.

scholarly journals Observing the three-dimensional terephthalic acid supramolecular growth mechanism on a stearic acid buffer layer by molecular simulation methods

RSC Advances ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 1319-1330
Author(s):  
Chia-Hao Su ◽  
Hui-Lung Chen ◽  
Shih-Jye Sun ◽  
Shin-Pon Ju ◽  
Tsu-Hsun Hou ◽  
...  
Keyword(s):  
Phase Separation ◽  
Stearic Acid ◽  
Buffer Layer ◽  
Molecular Simulation ◽  
Growth Mechanism ◽  
Terephthalic Acid ◽  
Three Dimensional ◽  
Layer By Layer ◽  
Simulation Methods ◽  
Growth Mechanisms

The terephthalic acid (TPA) supramolecular growth mechanisms on the stearic acid (STA) buffer layer, such as the phase separation and layer-by-layer (LBL) mechanisms, were considered by molecular simulations.

Crooked Ag2Te nanowires with rough surfaces: facile microwave-assisted solution synthesis, growth mechanism, and electrical performances

2014 ◽  
Vol 38 (1) ◽  
pp. 59-62 ◽  
Author(s):  
Jian Pei ◽  
Gang Chen ◽  
Dechang Jia ◽  
Yaoguang Yu ◽  
Jingxue Sun ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Rough Surfaces ◽  
Solution Synthesis ◽  
Microwave Assisted

Initial Stages of GaAs Epitaxy on Si

1988 ◽  
Vol 116 ◽  
Author(s):  
O. K. Biegelsen ◽  
F. A. Ponce ◽  
B. S. Krusor ◽  
J. C. Tramontana ◽  
R. D. Yingling ◽  
...  
Keyword(s):  
Interfacial Reaction ◽  
Growth Mechanism ◽  
Three Dimensional ◽  
Nucleation And Growth ◽  
Heteroepitaxial Growth ◽  
Island Growth ◽  
Passivating Layer ◽  
Gaas On Si ◽  
Graded Thickness ◽  
Substrate Temperatures

AbstractThe initial stages of heteroepitaxial growth of GaAs on Si have been observed using a technique of graded-thickness sample deposition. We find that an initial uniform passivating layer is grown, followed by three-dimensional nucleation determined by Ga diffusion and clustering, followed in turn by an interfacial reaction limited island growth mechanism. Results for various substrate temperatures and substrate orientations are consistent with the simple models of nucleation and growth.

Tem Characterization of Highly Oriented Diamond Films on (001) Silicon Synthesized by Bias Enhanced Nucleation Technique

1996 ◽  
Vol 458 ◽  
Author(s):  
Seung-Joon Jeon ◽  
Arun Kumar Chawla ◽  
Young-Joon Baik ◽  
Changmo Sung
Keyword(s):  
Surface Morphology ◽  
Growth Mechanism ◽  
Silicon Substrate ◽  
Three Dimensional ◽  
Diamond Films ◽  
Nucleation And Growth ◽  
Texture Formation ◽  
Tem Characterization ◽  
Nucleation And Growth Mechanism

ABSTRACTHighly oriented diamond films were deposited on a (001) silicon substrate by bias enhanced MPCVD technique. Three-dimensional TEM characterizations were carried out to understand the nucleation and growth mechanism of diamond grains. The surface morphology, defects, and misorientations of diamond films were compared as a function of synthesizing temperatures and thickness of the films. From our experimental results the texture formation mechanism of diamond films is discussed.

Controllable hydrothermal synthesis, growth mechanism, and properties of ZnO three-dimensional structures

2010 ◽  
Vol 34 (4) ◽  
pp. 732 ◽  
Author(s):  
Yangang Sun ◽  
Junqing Hu ◽  
Na Wang ◽  
Rujia Zou ◽  
Jianghong Wu ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Growth Mechanism ◽  
Three Dimensional

Low Temperature Synthesis of Cu2O Crystals: Shape Evolution and Growth Mechanism

2010 ◽  
Vol 10 (1) ◽  
pp. 99-108 ◽  
Author(s):  
Yongming Sui ◽  
Wuyou Fu ◽  
Haibin Yang ◽  
Yi Zeng ◽  
Yanyan Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Growth Mechanism ◽  
Shape Evolution ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis
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