DNA-AgNCs as a fluorescence turn-off probe for dual functional detection of H2O2 and Fe(II) ions

Lin, Xi; Xuan, Dongliang; Li, Feifei; Liu, Can; Fan, Pengfei; Xiao, Fubin; Liang, Hao; Yang, Shengyuan

doi:10.1016/j.saa.2019.117894

Cited by 24 publications

(8 citation statements)

References 20 publications

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“…The uorescence spectra showed the maximum emission at 528 nm under the maximum excitation . 37 These results indicated that uorescent DNA-AgNCs was successfully manufactured.…”

Section: Characterization Of Agnp/swcnts and Dna-agncsmentioning

confidence: 85%

A self-cascade system based on Ag nanoparticle/single-walled carbon nanotube nanocomposites as an enzyme mimic for ultrasensitive detection of l-cysteine

Li¹,

Hu²,

Su³

et al. 2023

Anal. Methods

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“…The uorescence spectra showed the maximum emission at 528 nm under the maximum excitation . 37 These results indicated that uorescent DNA-AgNCs was successfully manufactured.…”

Section: Characterization Of Agnp/swcnts and Dna-agncsmentioning

confidence: 85%

A self-cascade system based on Ag nanoparticle/single-walled carbon nanotube nanocomposites as an enzyme mimic for ultrasensitive detection of l-cysteine

Li¹,

Hu²,

Su³

et al. 2023

Anal. Methods

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“…Rapidly and accurately detecting hydrogen peroxide (H 2 O 2 ) plays critical roles in clinical diagnostics, environmental monitoring, the food industry, and biotechnology. − At present, several analytical methods are being used to detect H 2 O 2 , such as fluorescence, spectroscopy, chromatography, and electrochemistry. , Among them, the electrochemical sensing technology, relying on the electrical signal produced by the interaction between electroactive materials and analytes, has quickly aroused widespread interest because of its advantages of low cost, high sensitivity, rapid response, easy integration, and miniaturization. , As a typical electroactive material, noble metal nanoparticles (PtNPs, AuNPs, AgNPs, etc.) have brought about widespread attention owing to their high electrochemical activity, which can significantly improve the conductivity of electrodes and promote electron transfer during the reduction of H 2 O 2 . − Up to now, numerous highly sensitive H 2 O 2 electrochemical sensing materials have been prepared through integrating noble metal nanoparticles onto three-dimensional (3D) electrodes with high specific surface area, greatly increasing the number of exposed electrocatalytic active centers. − However, in the detection and quantification of H 2 O 2 , such H 2 O 2 electrochemical sensing materials usually suffer from inferior stability and selectivity .…”

Section: Introductionmentioning

confidence: 99%

Au Nanoparticles@UiO-66 Composite Film-Coated Carbon Cloth Substrate for High-Performance H₂O₂ Electrochemical Sensing

Chai

Wang

et al. 2023

Inorg. Chem.

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Due to the strong oxidizability of H2O2, rapid, accurate, sensitive, and stable sensors of hydrogen peroxide (H2O2) have attracted wide attention in the chemical industry, food, medicine, household detergents, and environmental monitoring fields. Here, a high-performance H2O2 electrochemical sensing platform is proposed based on an Au nanoparticles@UiO-66 film coated on a carbon cloth (CC) electrode (Au NPs@UiO-66/CC electrode). The Au NPs@UiO-66/CC electrode was prepared through solvothermal growth of a UiO-66 film on a functionalized three-dimensional CC electrode, followed by in situ deposition of Au NPs into the UiO-66 film under a periodic galvanostatic pulse current. The in situ preparation strategy greatly improves the electrical interaction between Au NPs@UiO-66 and the CC substrate without sacrificing the electrochemical activity of the Au NPs@UiO-66/CC electrode. Meanwhile, thanks to the high specific surface area of the three-dimensional Au NPs@UiO-66/CC electrode, the optimized Au NPs@UiO-66/CC electrode illustrates excellent electrochemical detection capability for H2O2 with an extensive linear range (0.1–21 mM), high sensitivity (1048.01 μA mM–1 cm–2), and lower limit of detection [0.033 μM (S/N = 3)] and limit of quantification [0.109 μM (S/N = 3)]. At the same time, the encapsulated structure of Au NPs in the UiO-66 film also endows the composite electrode with specific sensing performance owing to the regular opening channels of the UiO-66 films that prevent large-size interferents from reacting to the electrochemically active Au NPs. Together with all these advantages, the proposed sensing platform would exhibit great potential for electrochemical sensors and bioelectronics.

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“…The excess or lack of AA would reduce the metabolism and redox and thus lead to various diseases [ 9 , 10 ]. Generally, the fluorescent materials applied for metal ions and AA detection are divided into several groups, including gold and silver nanoclusters [ 11 , 12 ], organic dyes [ 13 , 14 ], and so on [ 15 , 16 ]. However, most of the materials have suffered from sophisticated material preparation procedures, high toxicity, and poor water solubility, especially when dealing with living systems.…”

Section: Introductionmentioning

confidence: 99%

One-Step Synthesis of Nitrogen/Fluorine Co-Doped Carbon Dots for Use in Ferric Ions and Ascorbic Acid Detection

et al. 2022

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Carbon dots (CDs) have caught enormous attention owing to their distinctive properties, such as their high water solubility, tunable optical properties, and easy surface modification, which can be generally used for the detection of heavy metals and organic pollutants. Herein, nitrogen and fluorine co-doped carbon dots (NFCDs) were designed via a rapid, low-cost, and one-step microwave-assisted technique using DL-malic acid and levofloxacin. The NFCDs emitted intense green fluorescence under UV lighting, and the optical emission peak at 490 nm was observed upon a 280 nm excitation, with a high quantum yield of 21.03%. Interestingly, the spectral measurements illustrated excitation-independent and concentration-independent single-color fluorescence owing to the presence of nitrogen and fluorine elements in the surface functional groups. Additionally, the NFCDs were applied for the selective detection of Fe3+ and ascorbic acid based on the “turn-off” mode. The detection limits were determined as 1.03 and 4.22 µM, respectively. The quenching mechanisms were explored using the static quenching mechanism and the inner filter effect. Therefore, a NFCDs fluorescent probe with single color emission was successfully developed for the convenient and rapid detection of Fe3+ and ascorbic acid in environments.

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DNA-AgNCs as a fluorescence turn-off probe for dual functional detection of H2O2 and Fe(II) ions

Cited by 24 publications

References 20 publications

A self-cascade system based on Ag nanoparticle/single-walled carbon nanotube nanocomposites as an enzyme mimic for ultrasensitive detection of l-cysteine

A self-cascade system based on Ag nanoparticle/single-walled carbon nanotube nanocomposites as an enzyme mimic for ultrasensitive detection of l-cysteine

Au Nanoparticles@UiO-66 Composite Film-Coated Carbon Cloth Substrate for High-Performance H₂O₂ Electrochemical Sensing

One-Step Synthesis of Nitrogen/Fluorine Co-Doped Carbon Dots for Use in Ferric Ions and Ascorbic Acid Detection

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DNA-AgNCs as a fluorescence turn-off probe for dual functional detection of H2O2 and Fe(II) ions

Cited by 24 publications

References 20 publications

A self-cascade system based on Ag nanoparticle/single-walled carbon nanotube nanocomposites as an enzyme mimic for ultrasensitive detection of l-cysteine

A self-cascade system based on Ag nanoparticle/single-walled carbon nanotube nanocomposites as an enzyme mimic for ultrasensitive detection of l-cysteine

Au Nanoparticles@UiO-66 Composite Film-Coated Carbon Cloth Substrate for High-Performance H2O2 Electrochemical Sensing

One-Step Synthesis of Nitrogen/Fluorine Co-Doped Carbon Dots for Use in Ferric Ions and Ascorbic Acid Detection

Contact Info

Product

Resources

About

Au Nanoparticles@UiO-66 Composite Film-Coated Carbon Cloth Substrate for High-Performance H₂O₂ Electrochemical Sensing