The selective deprotonation of carbon quantum dots for fluorescent detection of phosphate and visualization of latent fingerprints

Nanoscale ◽  
2021 ◽  
Author(s):  
Li Yang ◽  
Qi Zhang ◽  
Ying Han ◽  
Hongjuan Li ◽  
Shiguo Sun ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Rapid Determination ◽  
Carbon Quantum Dots ◽  
Water Soluble ◽  
Fluorescent Detection ◽  
Latent Fingerprints ◽  
Fluorescent Sensing ◽  
Turn On ◽  
Sensing Platform

We developed a water-soluble, stable and selective “turn-on” fluorescent sensing platform based on carbon quantum dots (CQDs) for rapid determination of the phosphate (Pi) in aqueous solutions and visualization of...

Rapid determination of melamine in milk using water-soluble CdTe quantum dots as fluorescence probes

2011 ◽  
pp. 1-12 ◽  
Author(s):  
Minwei Zhang† ◽  
Hong Ping† ◽  
Xianyi Cao ◽  
Hongkun Li ◽  
Fengrui Guan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Rapid Determination ◽  
Water Soluble ◽  
Cdte Quantum Dots ◽  
Fluorescence Probes

Graphitic carbon quantum dots as a fluorescent sensing platform for highly efficient detection of Fe3+ ions

RSC Advances ◽  
2013 ◽  
Vol 3 (11) ◽  
pp. 3733 ◽  
Author(s):  
Yong-Lai Zhang ◽  
Lei Wang ◽  
Heng-Chao Zhang ◽  
Yang Liu ◽  
Hai-Yu Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
Graphitic Carbon ◽  
Fluorescent Sensing ◽  
Highly Efficient ◽  
Efficient Detection ◽  
Sensing Platform

Large-scale synthesis of soluble graphitic hollow carbon nanorods with tunable photoluminescence for the selective fluorescent detection of DNA

2016 ◽  
Vol 40 (2) ◽  
pp. 1571-1579 ◽  
Author(s):  
Kumud Malika Tripathi ◽  
Amit Kumar Sonker ◽  
Anshu Bhati ◽  
Jagannath Bhuyan ◽  
Anupriya Singh ◽  
...  
Keyword(s):  
Large Scale ◽  
Water Soluble ◽  
Fluorescent Detection ◽  
High Yield ◽  
Dna Molecules ◽  
Selective Determination ◽  
Turn On ◽  
Large Scale Synthesis ◽  
Hollow Carbon

A high-yield synthesis of water-soluble photoluminescent carbon nanorods is described. The wsCNRs were used for the selective determination of DNA molecules via a fluorescent turn-off/turn-on mechanism.

β-Cyclodextrin functionalized carbon quantum dots as sensors for determination of water-soluble C60 fullerenes in water

The Analyst ◽  
2016 ◽  
Vol 141 (9) ◽  
pp. 2682-2687 ◽  
Author(s):  
Angelina Cayuela ◽  
M. Laura Soriano ◽  
Miguel Valcárcel
Keyword(s):  
Quantum Dots ◽  
Direct Determination ◽  
Carbon Quantum Dots ◽  
Water Soluble ◽  
Soluble C ◽  
Water Soluble C ◽  
C60 Fullerenes

A selective photoluminescence method based on Carbon Quantum Dots (CQDs) functionalized with carboxymethyl-β-cyclodextrin for the direct determination of water-soluble C60 fullerene has been developed.

A turn-on fluorescent nanoprobe based on N-doped silicon quantum dots for rapid determination of glyphosate

2020 ◽  
Vol 187 (6) ◽  
Author(s):  
Xianfeng Wang ◽  
Yixia Yang ◽  
Danqun Huo ◽  
Zhong Ji ◽  
Yi Ma ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Rapid Determination ◽  
Silicon Quantum Dots ◽  
Turn On ◽  
Fluorescent Nanoprobe ◽  
Doped Silicon

Carboxylic Carbon Quantum Dots as a Fluorescent Sensing Platform for DNA Detection

2016 ◽  
Vol 8 (3) ◽  
pp. 1951-1957 ◽  
Author(s):  
Adeline Huiling Loo ◽  
Zdenek Sofer ◽  
Daniel Bouša ◽  
Pavel Ulbrich ◽  
Alessandra Bonanni ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Dna Detection ◽  
Carbon Quantum Dots ◽  
Fluorescent Sensing ◽  
Sensing Platform

“Turn-on” fluorescent detection of cyanide based on polyamine-functionalized carbon quantum dots

RSC Advances ◽  
2014 ◽  
Vol 4 (8) ◽  
pp. 3685-3689 ◽  
Author(s):  
Yongqiang Dong ◽  
Ruixue Wang ◽  
Wanrong Tian ◽  
Yuwu Chi ◽  
Guonan Chen
Keyword(s):  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
Fluorescent Detection ◽  
Turn On

scholarly journals Carbon Quantum Dots Prepared with Chitosan for Synthesis of CQDs/AuNPs for Iodine Ions Detection

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1043 ◽  
Author(s):  
Juanjuan Song ◽  
Li Zhao ◽  
Yesheng Wang ◽  
Yun Xue ◽  
Yujia Deng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Color Change ◽  
Colorimetric Method ◽  
High Sensitivity ◽  
Hydrothermal Carbonization ◽  
Carbon Quantum Dots ◽  
Water Soluble ◽  
Synthetic Process ◽  
Iodide Ions

Water-soluble and reductive carbon quantum dots (CQDs) were fabricated by the hydrothermal carbonization of chitosan. Acting as a reducing agent and stabilizer, the as-prepared CQDs were further used to synthesize gold nanoparticles (AuNPs). This synthetic process was carried out in aqueous solution, which was absolutely “green”. Furthermore, the CQDs/AuNPs composite was used to detect iodine ions by the colorimetric method. A color change from pink to colorless was observed with the constant addition of I− ions, accompanied by a decrease in the absorbance of the CQDs/AuNPs composite. According to the absorbance change, a favorable linear relationship was obtained between ΔA and I− concentration in the range of 20–140 μM and 140–400 μM. The detection limit of iodide ions, depending on the 3δ/slope, was estimated to be 2.3 μM, indicating high sensitivity to the determination of iodide. More importantly, it also showed good selectivity toward I− over other anion ions, and was used for the analysis of salt samples. Moreover, TEM results indicated that I− ions induced the aggregation of CQDs/AuNPs, resulting in changes in color and absorbance.

LUMINESCENT DETERMINATION OF SUGAR IN NATURAL HONEY

2020 ◽  
Vol 0 (4) ◽  
pp. 29-32
Author(s):  
B.M. GAREEV ◽  
◽  
A.M. ABDRAKHMANOV ◽  
G.L. SHARIPOV ◽  
◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laboratory Test ◽  
Aqueous Solutions ◽  
Analytical Method ◽  
Sugar Content ◽  
Carbon Quantum Dots ◽  
Photoluminescence Intensity ◽  
Sucrose Content ◽  
Natural Honey

The photoluminescence of carbon quantum dots synthesized from natural honey and mixtures of honey and sugar has been studied. An increase in the sugar content leads to a decrease in the photoluminescence intensity without changing the shape of the luminescence spectrum of these quantum dots aqueous solutions, which is associated with a decrease in the yield of their synthesis in the sugar presence. The discovered effect can be used to detect sugar in honey. When examining five different market samples of flower honey using this method, two of them showed a significant decrease in the photoluminescence intensity. A laboratory test for compliance with GOST 19792-2017 Standard requirements established an excess of the sucrose content in these samples. Luminescent determination of sugar in honey does not require complicated equipment and can be used to develop a new analytical method for determining the sugar content in counterfeit natural honey.

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