Synthesis and characterization of high-purity, single phase hexagonal Bi2Te3 nanostructures

RSC Advances ◽  
2015 ◽  
Vol 5 (32) ◽  
pp. 24930-24935 ◽  
Author(s):  
L. Giri ◽  
G. Mallick ◽  
A. C. Jackson ◽  
M. H. Griep ◽  
S. P. Karna
Keyword(s):  
High Purity ◽  
Solvothermal Synthesis ◽  
Single Phase ◽  
Electrical Characterization ◽  
Synthesis And Characterization ◽  
High Current ◽  
Pellet Surface ◽  
Hexagonal Nanoplates

Schematic solvothermal synthesis of Bi2Te3 (a) producing Bi2Te3 hexagonal nanoplates (TEM) (b) which was converted into pellet (c). The electrical characterization (d) of the Bi2Te3 pellet surface showed significantly high current (more than 100 times) than through the pellet.

Synthesis and characterization of high purity, single phase GaN powder

1995 ◽  
Vol 10 (4) ◽  
pp. 266-268 ◽  
Author(s):  
Cengiz M. Balkas ◽  
Cem Basceri ◽  
Robert F. Davis
Keyword(s):  
High Purity ◽  
Single Phase ◽  
Tube Furnace ◽  
Synthesis And Characterization ◽  
Optimum Temperature ◽  
X Ray Diffraction ◽  
Crushed Material ◽  
X Ray ◽  
Scanning Electron

Synthesis of high-purity, single-phase gallium nitride (GaN) powder has been achieved by reacting molten Ga with flowing ammonia (NH3) in a hot wall tube furnace. The optimum temperature, NH3 flow rate, and position of the boat in the hot wall tube furnace relative to the NH3 inlet for the complete reaction to pure GaN for our system were 975 °C, 400 standard cubic centimeters per minute (seem) and 50 cm, respectively. The X-ray diffraction (XRD) data revealed the GaN to be single phase with a = 3.1891 Å, c = 5.1855 Å, in space group P63mc, Z=2 and Dx =6.089 g cm−3. Scanning electron microscopy revealed a particle size distribution in the crushed material between 1 and 5 μm with most of the particles being ≍1 μm.

Solvothermal Synthesis and Characterization of an One-Dimensional Zinc Phosphate

2002 ◽  
Vol 37 (2-3) ◽  
pp. 169-175 ◽  
Author(s):  
K. Yanxiong ◽  
L. Jianmin ◽  
Z. Yugen ◽  
H. Gaofei ◽  
J. Zheng ◽  
...  
Keyword(s):  
Solvothermal Synthesis ◽  
Zinc Phosphate ◽  
Synthesis And Characterization ◽  
One Dimensional

Solvothermal Synthesis and Characterization of a New Titanium Phosphate with a One-Dimensional Chiral Chain

2001 ◽  
Vol 13 (1) ◽  
pp. 203-207 ◽  
Author(s):  
Yanghong Guo ◽  
Zhan Shi ◽  
Jihong Yu ◽  
Jidong Wang ◽  
Yunling Liu ◽  
...  
Keyword(s):  
Solvothermal Synthesis ◽  
Titanium Phosphate ◽  
Synthesis And Characterization ◽  
One Dimensional

Hydrothermal Synthesis and Characterization of Nanocrystalline Gd2Sn2O7:Eu3+ Phosphors

2011 ◽  
Vol 239-242 ◽  
pp. 2851-2854 ◽  
Author(s):  
Jin Yu Yang ◽  
Yu Chang Su ◽  
Zhuo Chen ◽  
Xue Ying Liu
Keyword(s):  
Single Phase ◽  
Concentration Quenching ◽  
Synthesis And Characterization ◽  
Photoluminescence Properties ◽  
Excitation Spectra ◽  
Pyrochlore Type ◽  
Co Precipitation ◽  
Synthesized Materials ◽  
Quenching Phenomenon

Phase-pure Eu3+doped Gd2Sn2O7nanocrystals have been successfully synthesized via a co-precipitation processes combined with hydrothermal treatment. The crystal structure, particle size, morphologies, composition, and photoluminescence properties of the as-synthesized products were investigated by XRD, SEM, TEM, EDS and PL. The samples were single-phase cubic pyrochlore-type nanocrystals with a typical size of about 30 - 60 nm. All the samples exhibited irregular flower like secondary nanostructure assembled by primary nanoparticles. Photoluminescence properties of Gd2Sn2O7:Eu3+were investigated, and the results revealed that the as-synthesized materials displayed intense and prevailing emission located at 580 - 630 nm. The excitation spectra indicated that an energy transfer from Gd3+to Eu3+occurred. Meanwhile, the concentration quenching phenomenon was observed in Gd2Sn2O7:Eu3+nanocrystals.

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