Quantum Dots (QDs) Based Fluorescent Sensor for the Selective Determination of Nimesulide

2013 ◽  
Vol 23 (3) ◽  
pp. 473-478 ◽  
Author(s):  
Divya Thomas ◽  
Laina Lonappan ◽  
Leena Rajith ◽  
Soumya T. Cyriac ◽  
Krishnapillai Girish Kumar
Keyword(s):  
Quantum Dots ◽  
Fluorescent Sensor ◽  
Selective Determination

S doped silicon quantum dots with high quantum yield as a fluorescent sensor for determination of Fe3+ in water

2020 ◽  
Vol 110 ◽  
pp. 110461
Author(s):  
Xiaoshuo Zhang ◽  
Chunhua Li ◽  
Sheliang Zhao ◽  
Huiyun Pang ◽  
Yong Han ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Fluorescent Sensor ◽  
High Quantum Yield ◽  
Silicon Quantum Dots ◽  
High Quantum ◽  
Doped Silicon

UV-emitting polyelectrolyte-modified MoS2 quantum dots for selective determination of nitrophenol in water samples based on inner filter effect

2020 ◽  
Vol 98 (5) ◽  
pp. 222-227
Author(s):  
Keke Ning ◽  
Guoqiang Xiang ◽  
Cuicui Wang ◽  
Jingxing Wang ◽  
Xiaohong Qiao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Samples ◽  
Sodium Molybdate ◽  
Inner Filter Effect ◽  
Pond Water ◽  
Emission Peak ◽  
Selective Determination ◽  
Uv Emission ◽  
Filter Effect

In this work, poly(sodium 4-styrenesulfonate) (PSS) modified molybdenum disulfide quantum dots (MoS2-PSS QDs) were synthesized via a simple hydrothermal method using l-cysteine and anhydrous sodium molybdate as precursors and PSS as a modification reagent, and a selective and sensitive fluorescent sensing method for the determination of p-nitrophenol (p-NP) based on their UV emission was developed. The obtained MoS2-PSS QDs have an obvious UV emission peak (390 nm) with quantum yield of 5.13%. The strong absorption peak of p-NP at 400 nm has large spectral overlap with the UV emission peak (390 nm) of MoS2-PSS QDs. Because of this p-NP absorption, the fluorescence of MoS2-PSS QDs at 390 nm is quenched with the introduction of p-NP via the inner filter effect (IFE) and the decreased fluorescence intensity was linearly proportional to the p-NP concentration in the range of 1–20 μmol/L, leading to a detection limit of 0.13 μmol/L for p-NP. The MoS2 QDs-based fluorescent probe for p-NP is sensitive and selective and was successfully applied in the determination of p-NP in the pond water samples with satisfactory results.

Fluorescence suppression of MPA stabilized CdTe QDs for direct determination of propranolol

2017 ◽  
Vol 9 (6) ◽  
pp. 929-936 ◽  
Author(s):  
Fan Zhang ◽  
Miaomiao Chen ◽  
Haiqing Zhang ◽  
Huayu Xiong ◽  
Wei Wen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Fluorescent Sensor ◽  
Direct Determination ◽  
Cdte Quantum Dots ◽  
Mercaptopropionic Acid ◽  
Cdte Qds

A sensitive, convenient and rapid fluorescent sensor for effectively and directly detecting propranolol was proposed based on the fluorescence suppression of 3-mercaptopropionic acid stabilized CdTe quantum dots.

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