CdTe Quantum Dots in Buffers: Influence of Dispersion Time, pH Value, and Ion Concentration on Photoluminescence Properties

2012 ◽  
Vol 18 (1) ◽  
pp. 176-181 ◽  
Author(s):  
Aiyu Zhang ◽  
Qian Ma ◽  
Zhimin Yuan ◽  
Ping Yang
Keyword(s):  
Quantum Dots ◽  
Ph Value ◽  
Cdte Quantum Dots ◽  
Ion Concentration ◽  
Photoluminescence Properties

Application of CdTe Quantum Dots to Development Fingerprints on Adhesive Surfaces

2011 ◽  
Vol 694 ◽  
pp. 874-880 ◽  
Author(s):  
Rui Qin Yang ◽  
Yong Gang Wang ◽  
Bin Bin Xia ◽  
Yan Ji Wang ◽  
Jian Jun Liu
Keyword(s):  
Quantum Dots ◽  
Fluorescence Spectroscopy ◽  
Fluorescence Intensity ◽  
Development Time ◽  
Ph Value ◽  
Development Rate ◽  
Water Soluble ◽  
Cdte Quantum Dots ◽  
Cdte Qds ◽  
Effective Development

Water-soluble fluorescent CdTe quantum dots were synthesized using TGA (Thiolglycolic acid) as the stabilizer and characterized by fluorescence spectroscopy. This fluorescent material was applied to development fingerprints deposited on the sticky side of adhesives. The development conditions such as development time, temperature and pH value of QDs solution were investigated. The comparison experimental with traditional methods and development rate were also studied. The results show that this material exhibited strong visible fluorescence under excitation at 365 nm. CdTe QDs can detect fingerprints on different adhesive surfaces. In addition, the development rate of fingerprints on the adhesive side of cellulose tape was discussed and the effective development rate for 30-days-aged fingerprints can reach to 72%. Furthermore, the developed fingerprints have higher and stable fluorescence intensity, weaker background interference and better contrast between fingerprints and the substrate. CdTe QDs is a promising reagent for fingerprints development on adhesive surfaces.

Photoluminescence properties of a novel conjugate of water-soluble CdTe quantum dots to guanine

2010 ◽  
Vol 130 (4) ◽  
pp. 648-653 ◽  
Author(s):  
Xuejiao Feng ◽  
Qingkun Shang ◽  
Hongjian Liu ◽  
Wenlan Wang ◽  
Zhidan Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Soluble ◽  
Cdte Quantum Dots ◽  
Photoluminescence Properties

Synthesis and Photoluminescence of ZnS Quantum Dots

2008 ◽  
Vol 8 (3) ◽  
pp. 1312-1315 ◽  
Author(s):  
Yu Hua Wang ◽  
Zhong Chen ◽  
Xiao Qun Zhou
Keyword(s):  
Quantum Dots ◽  
Ph Value ◽  
Broad Band ◽  
Surface States ◽  
Average Diameter ◽  
Zinc Sulphide ◽  
Photoluminescence Properties ◽  
Strong Broad Band ◽  
Zinc Blende ◽  
Transmission Electron

Single-phase zinc sulphide (ZnS) quantum dots were synthesized by a chemical method. The influence of the pH value of the Zn(CH3COO)2 solution on the size and photoluminescence properties of the ZnS quantum dots was evaluated. X-ray power diffraction, transmission electron microscopy, and ultraviolet-visible spectroscopy were used to characterize the structure, size, surface states, and photoluminescence properties of ZnS quantum dots. The results showed that the crystal structure of ZnS quantum dots was a cubic zinc blende structure, and their average diameter was about 3.0 nm. ZnS quantum dots with good distribution and high purity were obtained. A strong broad band centered at about 320 nm was observed in the excitation spectrum of ZnS quantum dots. Their emission spectrum peaking at about 408 nm, was due mostly to the trap-state emission. The relative integrated emission intensity of ZnS quantum dots decreased as the pH value of the Zn(CH3COO)2 solution increased, which could be ascribed to the increase in average diameter of the ZnS quantum dots as the pH value of Zn(CH3COO)2 solution increased.

Effect of Adenine on the Photoluminescence Properties and Stability of Water-Soluble CdTe Quantum Dots

2009 ◽  
Vol 113 (17) ◽  
pp. 6929-6935 ◽  
Author(s):  
Xuejiao Feng ◽  
Qingkun Shang ◽  
Hongjian Liu ◽  
Hongdan Wang ◽  
Wenlan Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Soluble ◽  
Cdte Quantum Dots ◽  
Photoluminescence Properties ◽  
Stability Of Water

Fluorescenсе Properties of Complexes of Coumarin Derivatives/CdTe Quantum Dots under Interaction with Ammonia Molecules in Microconcentrations

2016 ◽  
Vol 8 (4(1)) ◽  
pp. 04032-1-04032-5
Author(s):  
V. P. Mitsai ◽  
◽  
A. G. Misyura ◽  
S. V. Kryvets ◽  
Ya. P. Lazorenko ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cdte Quantum Dots ◽  
Coumarin Derivatives

scholarly journals Crystalline borophene quantum dots and their derivative boron nanospheres

2021 ◽  
Author(s):  
Huiqi Wang ◽  
Duo An ◽  
Mei Wang ◽  
Liwen Sun ◽  
Ying Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hydrazine Hydrate ◽  
High Power ◽  
Photoluminescence Properties ◽  
Chemical Exfoliation ◽  
One Step

Crystalline borophene quantum dots with two-photo fluorescence and their derivative boron nanospheres with hydrazine hydrate-dependent photoluminescence properties were prepared by efficient high-power sonication method combined with chemical exfoliation and one-step...

Electrostatic repulsion strategy for highly selective and sensitive “switch–on” fluorescence sensor of ascorbic acid based on the cysteamine-coated CdTe quantum dots and cerium (IV)

2021 ◽  
Author(s):  
Yifei Guo ◽  
Jingjing Du ◽  
Jianjun Li ◽  
Ran Yang ◽  
Peter B. de Harrington ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Hydrothermal Method ◽  
Cadmium Chloride ◽  
Fluorescence Sensor ◽  
Cdte Quantum Dots ◽  
Electrostatic Repulsion ◽  
Functional Monomer ◽  
Simple Hydrothermal Method ◽  
Cdte Qds

In this work, cysteamine-coated CdTe quantum dots (CA-CdTe QDs) were synthesized by a simple hydrothermal method employing cadmium chloride as the cadmium source and cysteamine hydrochloride as the functional monomer....

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