Highly selective and sensitive fluorescence probe based on thymine-modified carbon dots for Hg2+ and l-cysteine detection

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 89121-89127 ◽  
Author(s):  
Hui Xu ◽  
Shanshan Huang ◽  
Caiyun Liao ◽  
Yang Li ◽  
Baozhan Zheng ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescence Probe ◽  
High Sensitivity ◽  
Sensitivity And Selectivity

The as-prepared thymine-modified carbon dots were applied to as a sensor for detecting Hg2+ and l-cysteine with high sensitivity and selectivity.

scholarly journals A highly selective and sensitive fluorescent probe for lactate dehydrogenase based on ultrabright adenosine monophosphate capped gold nanoclusters

RSC Advances ◽  
2017 ◽  
Vol 7 (22) ◽  
pp. 13438-13443 ◽  
Author(s):  
Jiao Liu ◽  
Hong-Wei Li ◽  
Yuqing Wu
Keyword(s):  
Lactate Dehydrogenase ◽  
Detection Limit ◽  
Fluorescent Probe ◽  
Fluorescence Probe ◽  
Gold Nanoclusters ◽  
High Sensitivity ◽  
Adenosine Monophosphate ◽  
Low Detection Limit ◽  
Sensitivity And Selectivity

The ultrabright AuNCs@AMP are used as fluorescence probe to detect lactate dehydrogenase (LDH) with high sensitivity and selectivity, showing an extremely low detection limit of 0.2 nM (26 pg μL−1, 0.8 U L−1).

Green preparation of carbon dots for Hg2+ detection and cell imaging

2020 ◽  
Vol 10 (11) ◽  
pp. 1777-1787
Author(s):  
Yadian Xie ◽  
Shanshan Wang ◽  
Ning Fu ◽  
Yan Yang ◽  
Xingliang Liu ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Carbon Dots ◽  
High Sensitivity ◽  
Amorphous Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carbon And Nitrogen ◽  
Transmission Electron ◽  
Sensitivity And Selectivity ◽  
Ft Ir

Carbon dots (CDs) also nitrogen-doped CDs (N-CDs) were produced by green hydrothermal synthesis using Pea and ethanediamine as the carbon and nitrogen source, separately. Transmission electron microscopy (TEM) images displayed that the prepared CDs and N-CDs were well dispersed, had a spherical morphology. X-ray diffraction (XRD) figures of CDs and N-CDs presented a graphitic amorphous structure. Fourier transform infrared spectroscopy (FT-IR) verified that CDs and N-CDs carried many different hydrophilic groups (for example hydroxyl, carboxyl/carbonyl, amide, amino groups) on the surface, X-ray photoelectron spectroscopy (XPS) together verified this result. However, the optical properties and fluorescence quantum yield for N-CDs were obviously superior to those of CDs. Furthermore, the prepared N-CDs displayed outstanding advantages including low toxicity, satisfactory biocompatibility, and excellent chemical stability. More prominently, the prepared N-CDs could detect Hg2+ ions with high sensitivity and selectivity in both water samples and HeLa cells.

Carbon dots–MnO2 nanocomposites for As(iii) detection in groundwater with high sensitivity and selectivity

2020 ◽  
Vol 12 (46) ◽  
pp. 5572-5580
Author(s):  
Xiaoyu He ◽  
Yong Li ◽  
Chao Yang ◽  
Liqiang Lu ◽  
Yulun Nie ◽  
...  
Keyword(s):  
Human Health ◽  
Carbon Dots ◽  
High Sensitivity ◽  
Environmental Safety ◽  
Sensitivity And Selectivity

As(iii) pollution has caused increasing concern due to its significant impact in environmental safety and human health.

scholarly journals A New Coumarin-Acridone Compound as a Fluorescence Probe for Fe3+ and Its Application in Living Cells and Zebrafish

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2115
Author(s):  
Jiayong Huang ◽  
Zhenshuo Yan ◽  
Peiling Qiu ◽  
Yufeng Mo ◽  
Qizhen Cao ◽  
...  
Keyword(s):  
Fluorescence Probe ◽  
High Resolution Mass Spectrometry ◽  
High Sensitivity ◽  
Cell Membrane Permeability ◽  
Buffer Solution ◽  
Intracellular Iron ◽  
Testing Metal ◽  
Imaging Results ◽  
Sensitivity And Selectivity ◽  
Low Cytotoxicity

A new coumarin-acridone fluorescent probe S was designed and synthesized, and the structure was confirmed with 1H/13C NMR spectrometry, single-crystal X-ray diffraction, and high-resolution mass spectrometry. This probe has high sensitivity and selectivity for Fe3+ over other testing metal ions at 420 or 436 nm in acetonitrile–MOPS (3-Morpholinopropanesulfonic Acid) buffer solution (20.0 μM, pH = 6.9, 8:2 (v/v)). Under physiological conditions, the probe displayed satisfying time stability with a detection limit of 1.77 µM. In addition, probe S was successfully used to detect intracellular iron changes through a fluorescence-off mode, and the imaging results of cells and zebrafish confirmed their low cytotoxicity and satisfactory cell membrane permeability, as well as their potential biological applications.

Valine-derived carbon dots with colour-tunable fluorescence for the detection of Hg2+ with high sensitivity and selectivity

2015 ◽  
Vol 39 (8) ◽  
pp. 6201-6206 ◽  
Author(s):  
Chunfang Zhang ◽  
Zhongbo Hu ◽  
Li Song ◽  
Yanyan Cui ◽  
Xiangfeng Liu
Keyword(s):  
Carbon Dots ◽  
High Sensitivity ◽  
Sensitivity And Selectivity ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Green and yellow fluorescent carbon dots with high sensitivity and selectivity for Hg2+ were synthesized from H3PO4 oxidation of valine.

Highly selective and sensitive sensing for Al3+ and F− based on green photoluminescent carbon dots

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 97346-97351 ◽  
Author(s):  
Xiang-Ying Sun ◽  
Lu-Lu Wu ◽  
Jiang-Shan Shen ◽  
Xue-Gong Cao ◽  
Cunjin Wen ◽  
...  
Keyword(s):  
Metal Ions ◽  
Carbon Dots ◽  
High Sensitivity ◽  
Sensitivity And Selectivity

A novel sensor for metal ions by mean of CDs with a PL enhancement response, which shows high sensitivity and selectivity. Furthermore, the CDs-Al3+ ions system could be employed to probe F− anions based on a PL “on–off” model.

CdSe Quantum Dots Decorated by 3-Aminobenzeneboronic Acid as Fluorescence Probe for Glucose

2011 ◽  
Vol 306-307 ◽  
pp. 1338-1341
Author(s):  
Shao Wei Wang ◽  
Xia Ona Zhang ◽  
Jing Hua Yu
Keyword(s):  
Quantum Dots ◽  
Fluorescence Probe ◽  
High Sensitivity ◽  
Cdse Quantum Dots ◽  
Optimal Conditions ◽  
Cdse Qds ◽  
Relative Standard ◽  
Sensitivity And Selectivity

A simple route to the production of high-quality CdSe quantum dots (QDs) is presented. The characterization of CdSe QDs was measured by Zetasizer Nano ZS, ultraviolet-visible spectoscopy and fluorospectrophotometer. The CdSe QDs were decorated by 3-Aminobenzeneboronic acid to obtain good fluorescent characteristic. Under the optimal conditions, the decreased normalized absorbance was linear to the concentration of glucose from 1.0×10−7 to 2.9×10−6 mol·L-1with a detection limit of 5.0´10-8mol·L-1. The relative standard deviation (RSD) for the determination of 1.0×10-7mol·L-1was 1.4 % by 11 replicate determination. In this paper, the fluorescent behavior of glucose with the decorated CdSe QDs was studied, and it is found that the system has a high sensitivity and selectivity for analysis of glucose.

scholarly journals Highly selective fluorescent carbon dots probe for mercury(ii) based on thymine–mercury(ii)–thymine structure

RSC Advances ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 3982-3988 ◽  
Author(s):  
Yong Li ◽  
Zhan-Yao Zhang ◽  
Hao-Fan Yang ◽  
Guang Shao ◽  
Feng Gan
Keyword(s):  
Carbon Dots ◽  
Fluorescent Sensor ◽  
High Sensitivity ◽  
Sensitivity And Selectivity ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

A novel thymine-functional fluorescent sensor was developed for Hg2+detection with high sensitivity and selectivity.

scholarly journals A Significant Fluorescent Aptamer Sensor Based on Carbon Dots and Graphene Oxide for Highly Selective Detection of Progesterone

2021 ◽  
Author(s):  
Hanyue Cui ◽  
Huan Lu ◽  
Li Li ◽  
Ya-ping Ding ◽  
Yao Fu
Keyword(s):  
Graphene Oxide ◽  
Carbon Dots ◽  
Energy Transfer Process ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
High Sensitivity ◽  
High Specificity ◽  
Optimal Conditions ◽  
Sensitivity And Selectivity ◽  
Aptamer Sensor

Abstract In this paper, a fluorescent aptamer sensor was constructed based on the carbon dots and graphene oxide. This sensor combines the excellent fluorescence performance of carbon dots with the high specificity of aptamers to detect progesterone with high sensitivity and selectivity. In the absence of progesterone, the carbon dots-aptamer system and graphene oxide form a fluorescence resonance energy transfer process(FRET), which quenches the fluorescence of the carbon dots. When progesterone is added, the aptamer specifically binds to progesterone, resulting the fluorescence of the carbon dots is recovered. At optimal conditions, the fluorescence intensity recovered by the carbon dots has a linear relationship with the concentration of progesterone in the range of 0.1-120 nM, and the detection limit is 3.3×10 -11 M. Besides, the sensor has satisfactory detection results of progesterone in milk, indicating that this method has a enormous potential for application in food safety.

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