A simple and sensitive label-free fluorescence sensing of heparin based on Cdte quantum dots

Luminescence ◽  
2015 ◽  
Vol 31 (4) ◽  
pp. 958-964 ◽  
Author(s):  
B. Rezaei ◽  
M. Shahshahanipour ◽  
Ali A. Ensafi
Keyword(s):  
Quantum Dots ◽  
Cdte Quantum Dots ◽  
Label Free ◽  
Fluorescence Sensing

scholarly journals PEGylation of protein-imprinted nanocomposites sandwiching CdTe quantum dots with enhanced fluorescence sensing selectivity

RSC Advances ◽  
2019 ◽  
Vol 9 (65) ◽  
pp. 38165-38173
Author(s):  
Xiao Han ◽  
Wenyan Han ◽  
Shiting Zhang ◽  
Zhiqiang Liu ◽  
Guoqi Fu
Keyword(s):  
Quantum Dots ◽  
Cdte Quantum Dots ◽  
Fluorescence Sensing ◽  
Enhanced Fluorescence

PEGylated CdTe quantum dots containing protein-imprinted nanocomposites showing enhanced fluorescence sensing selectivity.

Fluorescence Gas Sensor Using CdTe Quantum Dots Film to Detect Volatile Organic Compounds

2010 ◽  
Vol 663-665 ◽  
pp. 276-279 ◽  
Author(s):  
Norhayati Abu Bakar ◽  
Aidhia Rahmi ◽  
Akrajas Ali Umar ◽  
Muhamad Mat Salleh ◽  
Muhammad Yahaya
Keyword(s):  
Quantum Dots ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Cdte Quantum Dots ◽  
Fiber Optic Probe ◽  
Fluorescence Sensing ◽  
Organic Vapors ◽  
Volatile Organic ◽  
Wet Chemical ◽  
Optic Probe

This paper reports a study on fluorescence sensing properties of cadmium telluride (CdTe) quantum dots (QDs) film under exposure of volatile organic compounds; ethanol, 2-propanol and acetone. The high luminescence QDs were synthesized using a wet-chemical process. CdTe QDs film was deposited onto the surface of fiber optic probe by drop-casting method. The fluorescence properties of the film were studied by observing the change of photoluminescence (PL) spectra of the films in nitrogen (N2) and after exposing in organic vapors. It was observed that the PL of the film was quenched by the presence of the organic vapors. The amount and the rate of quenching are depended on the kind of the organic vapors

scholarly journals Label-Free Fluorescent Aptasensor for Ochratoxin—A Detection Based on CdTe Quantum Dots and (N-Methyl-4-pyridyl) Porphyrin

Toxins ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 447 ◽  
Author(s):  
Li Liu ◽  
Zafar Iqbal Tanveer ◽  
Keqiu Jiang ◽  
Qingwen Huang ◽  
Jinghui Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ochratoxin A ◽  
Cdte Quantum Dots ◽  
Random Coil ◽  
Label Free ◽  
Promising Tool ◽  
Cdte Qds ◽  
G Quadruplex ◽  
Sensitive Determination ◽  
Fluorescent Aptasensor

With the widespread contamination of ochratoxin A (OTA), it is of significant importance for detecting OTA in foods and traditional Chinese medicine (TCM). In this study, a novel label-free fluorescent aptasensor utilizing the interaction between OTA-triggered antiparallel G-quadruplex and (N-methyl-4-pyridy) porphyrin (TMPyP) for the rapid and sensitive determination of OTA was established. The fluorescence of CdTe quantum dots (QDs) could be quenched by TMPyP. In the presence of analyte (OTA), the aptamer could recognize OTA and transform from a random coil to the antiparallel G-quadruplex. The interaction between G-quadruplex and TMPyP could release CdTe QDs from TMPyP, and thus recover the fluorescence of CdTe QDs. Under optimized conditions, the detection limit of the designed aptasensor was 0.16 ng mL−1, with a linear range of 0.2 to 20 ng mL−1. Furthermore, this aptasensor showed high selectivity toward OTA against other structural analogs and other mycotoxins, and was successfully applied in Astragalus membranaceus samples. The presented aptasensor for OTA detection could be a promising tool for the field monitoring of food and TCM.

Label-free and turn-on fluorescent cyanide sensor based on CdTe quantum dots using silver nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 40088-40093 ◽  
Author(s):  
Ali A. Ensafi ◽  
N. Kazemifard ◽  
B. Rezaei
Keyword(s):  
Quantum Dots ◽  
Silver Nanoparticles ◽  
Trace Amount ◽  
Fluorescence Sensor ◽  
Cdte Quantum Dots ◽  
Label Free ◽  
Turn On

A turn-on fluorescence sensor is introduced for determination of trace amount of cyanide, based on glutathione-capped Cd–Te quantum dots.

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

A label-free fluorescent aptasensor based on HCR and G-quadruplex DNAzymes for the detection of prostate-specific antigen

The Analyst ◽  
2021 ◽  
Author(s):  
Ruirui Zhao ◽  
Lu Zhao ◽  
Haidi Feng ◽  
Xiaoliang Chen ◽  
Huilin Zhang ◽  
...  
Keyword(s):  
Prostate Specific Antigen ◽  
Specific Antigen ◽  
Label Free ◽  
Fluorescence Sensing ◽  
Sensing Platforms ◽  
G Quadruplex ◽  
Fluorescent Aptasensor

Fluorescence sensing platforms based on HCR and G-quadruplex DNAzyme amplification strategies for the detection of prostate-specific antigen.

Sign in / Sign up

Export Citation Format

Share Document