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.

In-line single-phase extraction for direct determination of total iron in oils using CdTe quantum dots and a flow-batch system

2015 ◽  
Vol 7 (18) ◽  
pp. 7707-7714 ◽  
Author(s):  
Marcelo B. Lima ◽  
Stéfani Iury E. Andrade ◽  
Inakã S. Barreto ◽  
Mário César U. Araújo
Keyword(s):  
Quantum Dots ◽  
Single Phase ◽  
Direct Determination ◽  
Total Iron ◽  
Cdte Quantum Dots ◽  
Phase Extraction ◽  
Batch System ◽  
System P ◽  
Novel Method

In this work, a novel method for direct determination of total iron in viscous samples is presented.

A novel multi-commutated method for the determination of hydroxytyrosol in enriched foods using mercaptopropionic acid-capped CdTe quantum dots

2013 ◽  
Vol 30 (9) ◽  
pp. 1485-1492 ◽  
Author(s):  
E.J. Llorent-Martínez ◽  
L. Molina-García ◽  
M.L. Fernández-de Córdova ◽  
J.L.M. Santos ◽  
S.S.M. Rodrigues ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cdte Quantum Dots ◽  
Mercaptopropionic Acid

A novel and sensitive turn-on fluorescent biosensor for the determination of thioctic acid based on Cu2+-modulated N-acetyl-l-cysteine capped CdTe quantum dots

RSC Advances ◽  
2015 ◽  
Vol 5 (55) ◽  
pp. 44173-44182 ◽  
Author(s):  
Xuanping Tan ◽  
Qin Li ◽  
Xiaoning Zhang ◽  
Yizhong Shen ◽  
Jidong Yang
Keyword(s):  
Quantum Dots ◽  
Aqueous Media ◽  
Fluorescence Sensor ◽  
Cdte Quantum Dots ◽  
Thioctic Acid ◽  
Fluorescent Biosensor ◽  
Turn On ◽  
Cdte Qds

A new fluorescence sensor for the determination of thioctic acid (TA) in aqueous media based on the recovered fluorescence of N-acetyl-l-cysteine capped CdTe quantum dots [NALC-CdTe QDs]–Cu2+ system was proposed.

Photoluminescent nanoprobes based on thiols capped CdTe quantum dots for direct determination of thimerosal in vaccines

Talanta ◽  
2021 ◽  
Vol 221 ◽  
pp. 121545
Author(s):  
Amidou Tall ◽  
Karolayne Rocha da Costa ◽  
Maria Janaína de Oliveira ◽  
Issa Tapsoba ◽  
Uéslen Rocha ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Direct Determination ◽  
Cdte Quantum Dots

l-Cysteine-capped CdTe quantum dots as a fluorescent probe for sequential detection of lysozyme and trypsin

2017 ◽  
Vol 41 (10) ◽  
pp. 4138-4144 ◽  
Author(s):  
Fanping Shi ◽  
Siyu Liu ◽  
Xingguang Su
Keyword(s):  
Quantum Dots ◽  
Fluorescent Probe ◽  
Fluorescence Assay ◽  
Cdte Quantum Dots ◽  
Sequential Detection ◽  
Sequential Determination ◽  
Cdte Qds

A fluorescence assay for the sequential determination of lysozyme and trypsin was established based on l-cysteine capped CdTe quantum dots. Lysozyme with positive charges can interact with l-cysteine capped CdTe quantum dots. Lysozyme can be hydrolyzed into small fragments in the presence of trypsin, and the interaction between l-cysteine-capped CdTe QDs and lysozyme would be inhibited, which could be used for trypsin quantification.

A novel competitive-displacement fluorescence assay for l-penicillamine based on the reaction between the target and N-acetyl-l-cysteine-capped CdTe quantum dots for copper ions

2018 ◽  
Vol 10 (19) ◽  
pp. 2263-2271 ◽  
Author(s):  
Yunmei Huang ◽  
Jidong Yang ◽  
Haiyan Yuan ◽  
Yuan Guo ◽  
Xiaoqing Zeng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Fluorescent Probes ◽  
Copper Ions ◽  
Fluorescence Assay ◽  
Cdte Quantum Dots ◽  
Competitive Displacement ◽  
Cdte Qds

CdTe quantum dots (CdTe QDs) were modified by N-acetyl-l-cysteine (NALC) as novel fluorescent probes and successfully utilized for the determination of l-penicillamine.

scholarly journals CdTe Quantum Dots Modified with Cysteamine: A New Efficient Nanosensor for the Determination of Folic Acid

Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4548 ◽  
Author(s):  
Doris E. Ramírez-Herrera ◽  
Ana Patricia Reyes-Cruzaley ◽  
Giselle Dominguez ◽  
Francisco Paraguay-Delgado ◽  
Antonio Tirado-Guízar ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Folic Acid ◽  
Fluorescence Quenching ◽  
Low Cost ◽  
Water Soluble ◽  
Cdte Quantum Dots ◽  
Photoluminescence Intensity ◽  
Beverage Samples ◽  
Cdte Qds

In this paper, we report the synthesis, characterization, and application of a new fluorescent nanosensor based on water-soluble CdTe quantum dots (QDs) coated with cysteamine (CA) for the determination of folic acid (FA). CdTe/CA QDs were characterized by high-resolution transmission electron microscopy, the zeta potential, and Fourier-transform infrared (FT-IR), UV-visible, and fluorescence spectroscopy. CdTe QDs coated with mercaptopropionic acid (MPA) and glutathione (GSH) were prepared for comparison purposes. The effect of FA on the photoluminescence intensity of the three thiol-capped QDs at pH 8 was studied. Only CdTe/CA QDs showed a notable fluorescence quenching in the presence of FA. Then, a nanosensor based on the fluorescence quenching of the CdTe QDs at pH 8 was explored. Under optimum conditions, the calibration curve showed a linear fluorescence quenching response in a concentration range of FA from 0.16 to 16.4 μM (R2 = 0.9944), with a detection limit of 0.048 μM. A probable mechanism of fluorescence quenching was proposed. The nanosensor showed good selectivity over other possible interferences. This method has been applied for FA quantification in orange beverage samples with excellent results (recoveries from 98.3 to 103.9%). The good selectivity, sensitivity, low cost, and rapidity make CdTe /CA QDs a suitable nanosensor for FA determination.

Sign in / Sign up

Export Citation Format

Share Document