Two-dimensional Acetate-based Light Lanthanide Fluoride Nanomaterials (F–Ln, Ln = La, Ce, Pr, and Nd): Morphology, Structure, Growth Mechanism, and Stability

2019 ◽  
Vol 141 (33) ◽  
pp. 13134-13142 ◽  
Author(s):  
Leitao Zhang ◽  
Weimin Kang ◽  
Qiang Ma ◽  
Yingfang Xie ◽  
Yunling Jia ◽  
...  
2011 ◽  
Vol 131 (5) ◽  
pp. 1082-1085 ◽  
Author(s):  
J.B. Wang ◽  
H.L. Yan ◽  
X.L. Zhong ◽  
X.L. Yuan ◽  
T. Sekiguchi

Nano Letters ◽  
2003 ◽  
Vol 3 (7) ◽  
pp. 919-923 ◽  
Author(s):  
Mingliang Tian ◽  
Jinguo Wang ◽  
James Kurtz ◽  
Thomas E. Mallouk ◽  
M. H. W. Chan

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1344 ◽  
Author(s):  
Sang-Chae Jeon ◽  
John G. Fisher ◽  
Suk-Joong L. Kang ◽  
Kyoung-Seok Moon

The grain growth behavior of 0.95(Na0.5Bi0.5)TiO3 –0.05BaTiO3 (mole fraction, NBT–5BT) grains was investigated with excess Bi2O3 addition. The powder compacts of NBT–5BT were sintered at 1200 °C for various sintering times and with various amounts of Bi2O3 (0.1, 1.5, 4.0 and 10.0 mol%). When Bi2O3 was added to round-edged cubic NBT–5BT, the grain shape changed to a more faceted cube and the amount of liquid phase increased during sintering. A more faceted cubic grain shape indicates an increase in the critical driving force for appreciable growth of grains. However, obvious abnormal grain growth did not appear in any of the NBT–5BT samples with excess Bi2O3. The amount of liquid phase increased as the amount of Bi2O3 increased. Therefore, the rate of grain growth could be decreased by the increasing the distance for the diffusion of atoms. These observations allowed us to conclude that the growth of Bi2O3-excess NBT–5BT grains is governed by the growth of facet planes via the two-dimensional nucleation grain growth mechanism during changing grain shape and amount of liquid.


Author(s):  
Lan Meng ◽  
Yanlu Yu ◽  
Wei Yan ◽  
Heng Li ◽  
Qiang Zhao ◽  
...  

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1640 ◽  
Author(s):  
Yina Wang ◽  
Lei Zhang ◽  
Chenhui Su ◽  
Hang Xiao ◽  
Shanshan Lv ◽  
...  

The in-situ observation is of great significance to the study of the growth mechanism and controllability of two-dimensional transition metal dichalcogenides (TMDCs). Here, the differential reflectance spectroscopy (DRS) was performed to monitor the growth of molybdenum disulfide (MoS2) on a SiO2/Si substrate prepared by chemical vapor deposition (CVD). A home-built in-situ DRS setup was applied to monitor the growth of MoS2 in-situ. The formation and evolution of monolayer MoS2 are revealed by differential reflectance (DR) spectra. The morphology, vibration mode, absorption characteristics and thickness of monolayer MoS2 have been confirmed by optical microscopy, Raman spectroscopy, ex-situ DR spectra, and atomic force microscopy (AFM) respectively. The results demonstrated that DRS was a powerful tool for in-situ observations and has great potential for growth mechanism and controllability of TMDCs prepared by CVD. To the best of the authors’ knowledge, it was the first report in which the CVD growth of two-dimensional TMDCs has been investigated in-situ by reflectance spectroscopy.


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