pH-Response Quantum Dots with Orange–Red Emission for Monitoring the Residue, Distribution, and Variation of an Organophosphorus Pesticide in an Agricultural Crop

2021 ◽  
Vol 69 (9) ◽  
pp. 2689-2696 ◽  
Author(s):  
Qiaoting Yang ◽  
Qian Li ◽  
Haiyin Li ◽  
Feng Li
Keyword(s):  
Quantum Dots ◽  
Organophosphorus Pesticide ◽  
Agricultural Crop ◽  
Red Emission ◽  
Ph Response

The Emission Property of Phosphors LEDs Based on ZnCuInS/ZnSe/ZnS Quantum Dots

2014 ◽  
Vol 989-994 ◽  
pp. 623-625
Author(s):  
Ke Bi ◽  
Wen Yan Liu ◽  
Tian Yue Xu ◽  
Tie Qiang Zhang ◽  
Yu Zhang
Keyword(s):  
Quantum Dots ◽  
Photoluminescence Spectrum ◽  
Stokes Shift ◽  
Core Shell ◽  
Photoluminescence Properties ◽  
Red Emission ◽  
Light Emitting ◽  
Quantum Size ◽  
Gan Led ◽  
Photoluminescence Peak

.In this research, ZnCuInS/ZnSe/ZnS quantum dots (QDs) have been studied as an excellent red emitting source for blue GaN LED because of its non-toxic deep red emmission, and large Stokes shift properties. In the paper ZnCuInS/ZnSe/ZnS core/shell quantum dots were prepared with the particle size of 4.5nm. According to the measurement of photoluminescence spectrum emitted by ZnCuInS/ZnSe/ZnS core/shell quantum dots, the emitting peak of 700 nm and the full was achieved as red emitter.It was found that absorption edge and photoluminescence peak shifted to shorter wavelength with decreasing the nanocrystal size due to quantum size effect.Meanwhile, we were prepared ZnCuInS/ZnSe/ZnS core/shell quantum dot light emitting diodes and their photoluminescence properties were studied. After the suitable bias was applied on the films, increasing the ZnCuInS/ZnSe/ZnS QDs concentration in the blue GaN chips, red emission increased with decreasing LED’s blue light.

Highly-sensitive organophosphorus pesticide biosensors based on CdTe quantum dots and bi-enzyme immobilized eggshell membranes

The Analyst ◽  
2016 ◽  
Vol 141 (3) ◽  
pp. 1105-1111 ◽  
Author(s):  
Gao Xue ◽  
Zhao Yue ◽  
Zhang Bing ◽  
Tang Yiwei ◽  
Liu Xiuying ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Organophosphorus Pesticides ◽  
Organophosphorus Pesticide ◽  
Cdte Quantum Dots ◽  
Optical Biosensing ◽  
Highly Sensitive ◽  
Eggshell Membranes

An optical biosensing method using CdTe quantum dots (QDs) and bi-enzyme-immobilized eggshell membranes for the determination of organophosphorus pesticides (OPs) has been developed.

Photoluminescent Characteristics of ZnS Quantum Dots Synthesized in Non-Aqueous-Phase

2013 ◽  
Vol 750-752 ◽  
pp. 991-994
Author(s):  
Jing Liu ◽  
Ming Ying ◽  
Yu Ling Tan ◽  
Bo Xi
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Quantum Yield ◽  
Reaction Medium ◽  
Emission Spectra ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Zinc Blend ◽  
Red Emission ◽  
X Ray

ZnS quantum dots (ZnS QDs) synthesized in aqueous solution is easy to gather a mass, which always results in low quantum yield. So, in this study benzene was used as reaction medium in which ZnS QDs with different hues were synthesized, and the hues of ZnS QDs were depend on the molar ratio of Zn (CH3COO)2 and Na2S·9H2O. The results show the emission spectra of ZnS QDs shifts with the change of the precursor molar ratio but the absorption peak at 310nm is not. The emission peaks centered at 430nm and 580nm at higher molar ratio [Zn2+]/[S2-] with blue-violet emitting phosphors; but, ZnS QDs synthesized at higher molar ratio [S2-]/[Zn2+] have orange-red emission at 580nm only. The X-ray diffraction analysis shows the crystallinity of ZnS QDs is better at [Zn2+]/[S2-]=1:10, which are typical zinc blend with nanorod structure.

Pure red emission hybrid light-emitting devices based on the blend of CdSe/ZnS quantum dots and an n-type polymer

2012 ◽  
Vol 520 (24) ◽  
pp. 7153-7156 ◽  
Author(s):  
Gang Cheng ◽  
Dehua Hu ◽  
Ping Chen ◽  
Yu Duan ◽  
Yi Zhao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Red Emission ◽  
Light Emitting ◽  
Light Emitting Devices

A sandwich-type ECL immunosensor for sensitive determination of CEA content based on red emission carbon quantum dots as luminophores

2021 ◽  
Author(s):  
Yuefang Hu ◽  
Yuxin Chen ◽  
Quan Tang ◽  
Hanfu Liu
Keyword(s):  
Quantum Dots ◽  
Microwave Synthesis ◽  
Synthesis Method ◽  
Carbon Quantum Dots ◽  
Single Step ◽  
Red Emission ◽  
Sandwich Type ◽  
Sensitive Determination

A sandwich-type electrochemiluminescence (ECL) immunosensor was constructed using red-emitting carbon quantum dots (RCQDs) as luminophores. The RCQDs were prepared in a single step by the simple green microwave synthesis method...

Study of InGaN red emission multiple Quantum Dots

2005 ◽  
Author(s):  
Te-Chung Wang ◽  
Hao-Chung Kuo ◽  
Ching-En Tsai ◽  
Min-Ying Tsai ◽  
Jung-Tsung Hsu
Keyword(s):  
Quantum Dots ◽  
Multiple Quantum ◽  
Red Emission

P-210L:Late-News Poster: High-Performance Electroluminescence Devices Based on Size-Uniform Gigantic Red-Emission Quantum Dots

2016 ◽  
Vol 47 (1) ◽  
pp. 1487-1490
Author(s):  
Chih-Jung Chen ◽  
Chun-Yuan Huang ◽  
Jiun-Yi Lien ◽  
Sue-Lein Wang ◽  
Ray-Kuang Chiang
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Red Emission

Lead-free Mn-doped antimony halide perovskite quantum dots with bright deep-red emission

2021 ◽  
Vol 57 (21) ◽  
pp. 2677-2680
Author(s):  
Aifei Wang ◽  
Faheem Muhammad ◽  
Yao Liu ◽  
Zhengtao Deng
Keyword(s):  
Quantum Dots ◽  
Lead Free ◽  
Red Emission ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite ◽  
Mn Doped

Lead-free Mn2+ doped Cs3Sb2Clx/Br9−x (0 ≤ x ≤9) perovskite QDs with bright deep-red emission of 660 nm were synthesized.

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