Dual-emission quantum dots nanocomposites bearing an internal standard and visual detection for Hg2+

The Analyst ◽  
2012 ◽  
Vol 137 (5) ◽  
pp. 1125 ◽  
Author(s):  
Xiangying Sun ◽  
Bin Liu ◽  
Yibang Xu
Keyword(s):  
Quantum Dots ◽  
Visual Detection ◽  
Internal Standard ◽  
Dual Emission

Instant Visual Detection of Trinitrotoluene Particulates on Various Surfaces by Ratiometric Fluorescence of Dual-Emission Quantum Dots Hybrid

2011 ◽  
Vol 133 (22) ◽  
pp. 8424-8427 ◽  
Author(s):  
Kui Zhang ◽  
Haibo Zhou ◽  
Qingsong Mei ◽  
Suhua Wang ◽  
Guijian Guan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Visual Detection ◽  
Ratiometric Fluorescence ◽  
Dual Emission

scholarly journals Dual-Emission Fluorescence Probe Based on CdTe Quantum Dots and Rhodamine B for Visual Detection of Mercury and Its Logic Gate Behavior

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 713
Author(s):  
Yuefeng Gao ◽  
Sai Xu ◽  
Zhijian Liu ◽  
Kezhen Yu ◽  
Xinxiang Pan
Keyword(s):  
Quantum Dots ◽  
Rhodamine B ◽  
Visual Detection ◽  
Fluorescence Probe ◽  
Limit Of Detection ◽  
Logic Gate ◽  
Cdte Quantum Dots ◽  
Fluorescence Signal ◽  
Dual Emission ◽  
Cdte Qds

It is urgent that a convenient and sensitive technique of detecting Hg2+ be developed because of its toxicity. Conventional fluorescence analysis works with a single fluorescence probe, and it often suffers from signal fluctuations which are influenced by external factors. In this research, a novel dual-emission probe assembled through utilizing CdTe quantum dots (QDs) and rhodamine B was designed to detect Hg2+ visually. Only the emission of CdTe QDs was quenched after adding Hg2+ in the dual-emission probe, which caused an intensity ratio change of the two different emission wavelengths and hence facilitated the visual detection of Hg2+. Compared to single emission QDs-based probe, a better linear relationship was shown between the variation of fluorescence intensity and the concentration of Hg2+, and the limit of detection (LOD) was found to be11.4 nM in the range of 0–2.6 μM. Interestingly, the intensity of the probe containing Hg2+ could be recovered in presence of glutathione (GSH) due to the stronger binding affinity of Hg2+ towards GSH than that towards CdTe QDs. Based on this phenomenon, an IMPLICATION logic gate using Hg2+/GSH as inputs and the fluorescence signal of QDs as an output was constructed.

Single-layered graphene quantum dots with self-passivated layer from xylan for visual detection of trace chromium(Vl)

2021 ◽  
pp. 131833
Author(s):  
Jihai Cai ◽  
Guangda Han ◽  
Junli Ren ◽  
Chuanfu Liu ◽  
Jianlong Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Visual Detection ◽  
Graphene Quantum Dots

scholarly journals Design and Synthesis of Heterostructured Quantum Dots with Dual Emission in the Visible and Infrared

ACS Nano ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. 539-547 ◽  
Author(s):  
Qianglu Lin ◽  
Nikolay S. Makarov ◽  
Weon-kyu Koh ◽  
Kirill A. Velizhanin ◽  
Claudiu M. Cirloganu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Dual Emission ◽  
Design And Synthesis
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