High-Sensitivity Fluorescence Lifetime Thermal Sensing Based on CdTe Quantum Dots

Small ◽  
2012 ◽  
Vol 8 (17) ◽  
pp. 2652-2658 ◽  
Author(s):  
P. Haro-González ◽  
L. Martínez-Maestro ◽  
I. R. Martín ◽  
J. García-Solé ◽  
D. Jaque
Keyword(s):  
Quantum Dots ◽  
Fluorescence Lifetime ◽  
High Sensitivity ◽  
Cdte Quantum Dots ◽  
Thermal Sensing

Detection of glutathione with an “off–on” fluorescent biosensor based on N-acetyl-l-cysteine capped CdTe quantum dots

The Analyst ◽  
2015 ◽  
Vol 140 (19) ◽  
pp. 6748-6757 ◽  
Author(s):  
Xuanping Tan ◽  
Jidong Yang ◽  
Qin Li ◽  
Qiong Yang
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
High Sensitivity ◽  
Cdte Quantum Dots ◽  
Fluorescent Biosensor

This paper reports a quantum dot (QD)-based “off–on” fluorescent biosensor specifically for the determination of glutathione (GSH) with high sensitivity.

Use of CdTe quantum dots for high temperature thermal sensing

RSC Advances ◽  
2014 ◽  
Vol 4 (47) ◽  
pp. 24612-24618 ◽  
Author(s):  
Yangyang Li ◽  
Ben Q. Li
Keyword(s):  
Quantum Dots ◽  
High Temperature ◽  
Cdte Quantum Dots ◽  
Temperature Measurements ◽  
Electromechanical Systems ◽  
High Temperature Range ◽  
Temperature Range ◽  
Thermal Sensing

Thermal sensitive photoluminescence of CdTe quantum dots was used for micro-electromechanical systems temperature measurements in the high temperature range.

Facile Synthesis and Properties of Aqueous CdTe Quantum Dots for High-Sensitive Copper (II) Ion Detection

NANO ◽  
2017 ◽  
Vol 12 (12) ◽  
pp. 1750151 ◽  
Author(s):  
Yue Zheng ◽  
Hengshan Tang ◽  
Xiaoyu Wang ◽  
Ya Di ◽  
Kunling Lu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Limit Of Detection ◽  
Tap Water ◽  
High Sensitivity ◽  
Cdte Quantum Dots ◽  
Reaction Conditions ◽  
One Pot ◽  
Sensing System ◽  
Cdte Qds ◽  
Transmission Electron

The synthesis of aqueous MPA-capped CdTe quantum dots (QDs) via a facile one-pot route was developed. The particle size, optical properties and crystal structure of the as-synthesis QDs were investigated by transmission electron microscopy (TEM), Fourier transform infrared (FTIR), UV-vis absorption and photoluminescence (PL) spectra, respectively. Meanwhile, the effect of reaction conditions, including reaction time, pH and the quantity of sodium citrate (SC) on the growth of CdTe QDs were discussed. Then, the obtained CdTe QDs were successfully used for the detection of trace Cu[Formula: see text] with high sensitivity and excellent selectivity. The fluorescence intensity of CdTe QDs with Cu[Formula: see text] concentration showed a linear relationship in the range from [Formula: see text] mol/L to [Formula: see text][Formula: see text]mol/L. The correlation coefficient (R) is 0.9980 and limit of detection (LOD) is [Formula: see text][Formula: see text]mol/L. Moreover, the concentration of Cu[Formula: see text] in tap water samples was determined based on this sensing system and the recovery test was satisfactory.

scholarly journals Measuring anti-bunching Effect from Single Dye Molecules and Single Quantum Dots

2016 ◽  
Vol 26 (1) ◽  
pp. 67
Author(s):  
Nguyen Thi Thanh Bao ◽  
Dinh Van Trung ◽  
Dang Tuyet Phuong
Keyword(s):  
Quantum Dots ◽  
Single Molecule ◽  
Fluorescence Lifetime ◽  
Rhodamine B ◽  
Quantum Effect ◽  
Direct Proof ◽  
Second Order ◽  
Cdte Quantum Dots ◽  
Dye Molecules ◽  
Antibunching Effect

Antibunching is a quantum effect demonstrating clearly the quantum nature of the radiation field. Its detection through measurements of the second order correlation function is a direct proof of the presence of single molecule or single nano particle. In this paper we present the experimental setup of the Hanbury Brown - Twiss interferometer and the measurement results of the antibunching effect from single Rhodamine B dye molecules and single CdTe quantum dots in dilute solution. By fitting the second order correlation data, we derive a fluorescence lifetime of approximately 2 ns for Rhodamine B and 45 ns for CdTe quantum dots. Our results demonstrate an alternative way for determining the fluorescence lifetime using the antibunching effect.

scholarly journals A Novel Photoelectrochemical Aptamer Sensor Based on CdTe Quantum Dots Enhancement and Exonuclease I-Assisted Signal Amplification for Listeria monocytogenes Detection

Foods ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 2896
Author(s):  
Liangliang Zhu ◽  
Hongshun Hao ◽  
Chao Ding ◽  
Hanwei Gan ◽  
Shuting Jiang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Listeria Monocytogenes ◽  
Signal Amplification ◽  
High Sensitivity ◽  
Cdte Quantum Dots ◽  
Exonuclease I ◽  
Photosensitive Material ◽  
Construction Strategy ◽  
Aptamer Sensor ◽  
High Sensitivity Detection

To achieve the rapid detection of Listeria monocytogenes, this study used aptamers for the original identification and built a photoelectrochemical aptamer sensor using exonuclease-assisted amplification. Tungsten trioxide (WO3) was used as a photosensitive material, was modified with gold nanoparticles to immobilize complementary DNA, and amplified the signal by means of the sensitization effect of CdTe quantum dots and the shearing effect of Exonuclease I (Exo I) to achieve high-sensitivity detection. This strategy had a detection limit of 45 CFU/mL in the concentration range of 1.3 × 101–1.3 × 107 CFU/mL. The construction strategy provides a new way to detect Listeria monocytogenes.

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
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