scholarly journals Abnormal gas pressure sensitivity of the visible emission in ZnO quantum dots prepared by improved sol–gel method: the role of surface polarity

RSC Advances ◽  
2017 ◽  
Vol 7 (48) ◽  
pp. 29992-29997 ◽  
Author(s):  
Xiaoman Ma ◽  
Honggang Ye ◽  
Xiangyang Duan ◽  
Chu Li ◽  
Gaoming Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Sol Gel ◽  
Gas Pressure ◽  
Visible Emission ◽  
Pressure Sensitivity ◽  
Surface Polarity ◽  
Band Bending ◽  
Gel Method ◽  
Zno Quantum Dots

Polar surface induced band bending leads to the abnormal gas pressure sensitivity of visible emission in ZnO quantum dots.

Studies on Optical Properties of CdS/ZnO Quantum Dots Prepared by Sol-Gel Method

2011 ◽  
Vol 364 ◽  
pp. 129-133 ◽  
Author(s):  
Liyana Mohd Lawi Ruhana ◽  
Taqiyuddin Mawardi Ayob Muhammad ◽  
Radiman Shahidan ◽  
Irman Abdul Rahman ◽  
Bohari M. Yamin
Keyword(s):  
Quantum Dots ◽  
Sol Gel ◽  
Emission Spectra ◽  
Blue Shift ◽  
Mixture Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Transmission Electron ◽  
Zno Quantum Dots ◽  
Zno Qds

CdS/ZnO quantum dots (QDs) were prepared at a temperature of 293 K by the sol-gel method with Triethanolamine (TEA) as a capping agent. The effect of CdS/ZnO mixture ratio of 1:9, 1:1 and 9:1 on the optical absorption and fluorescence spectra were investigated by UV-Vis and Fluorescence spectroscopy. By increasing ZnO composition, a blue-shift of absorption edge and emission spectra were observed. The band gap for 1:9, 1:1 and 9:1 were found to be 4.13, 3.93 and 3.11 eV, respectively. The morphology of the CdS/ZnO QDs for each mixing ratio was obtained by transmission electron microscope (TEM). The size of the QDs was found to be in the range of 5-10 nm with some agglomerated particles.

Dual role of the reactant MOH (M=Li, Na or K) in the growth of ZnO quantum dots under a sol–gel process: promoter and inhibitor

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 50173-50179 ◽  
Author(s):  
Song Li ◽  
Song Ye ◽  
Tianhua Liu ◽  
Zhuang Guo ◽  
Huiyun Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Sol Gel ◽  
Dual Role ◽  
Synthesis Process ◽  
Sol Gel Process ◽  
Zno Quantum Dots ◽  
Sol Gel Synthesis

ZnO quantum dots (QDs) with tunable size and photoluminescence can be achieved simply by controlling their growth during the sol–gel synthesis process.

A sol–gel method for preparing ZnO quantum dots with strong blue emission

2011 ◽  
Vol 131 (10) ◽  
pp. 2072-2077 ◽  
Author(s):  
Zhong Chen ◽  
Xiao Xia Li ◽  
Guoping Du ◽  
Nan Chen ◽  
Andy Y.M. Suen
Keyword(s):  
Quantum Dots ◽  
Sol Gel ◽  
Blue Emission ◽  
Gel Method ◽  
Sol Gel Method ◽  
Strong Blue Emission ◽  
Zno Quantum Dots

Band gap variation of size-controlled ZnO quantum dots synthesized by sol–gel method

2005 ◽  
Vol 409 (4-6) ◽  
pp. 208-211 ◽  
Author(s):  
Kuo-Feng Lin ◽  
Hsin-Ming Cheng ◽  
Hsu-Cheng Hsu ◽  
Li-Jiaun Lin ◽  
Wen-Feng Hsieh
Keyword(s):  
Quantum Dots ◽  
Band Gap ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Zno Quantum Dots ◽  
Size Controlled

Insights into the role of strontium in toluene catalytic combustion over La1-xSrxCoO3 perovskites catalysts

2022 ◽  
Author(s):  
Mo Liu ◽  
Xiaoli Yang ◽  
ZiMeng Tian ◽  
Huimin Wang ◽  
Liangtao Yin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Combustion ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
A Site

A series of LaCoO3 pervoskite catalysts substituted by Sr in A site (La1-xSrxCoO3) were prepared via a facile sol-gel method. The catalytic activity of these pervoskite catalysts for the deep...

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