Multicolor colorimetric assay for copper ion detection based on the etching of gold nanorods

Zhou, Hang‐Yu; Li, Peng; Tian, Tao; Zhang, Weiyi; Chen, Guoying; Zhang, Hao; Yang, Feng‐Qing

doi:10.1007/s00604-022-05515-y

Cited by 14 publications

(4 citation statements)

References 35 publications

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“…Cu 2+ plays a vital role in different metabolic processes in living organisms, but high concentrations of Cu 2+ entering the human body can have serious toxic effects [ 25 ]. The intensity of the red fluorescence emission of Ce6 at 652 nm gradually decreased with the continuous addition of Cu 2+ ( Figure 6 A).…”

Section: Resultsmentioning

confidence: 99%

“…Cu 2+ plays a vital role in different metabolic processes in living organisms, but high concentrations of Cu 2+ entering the human body can have serious toxic effects [25]. The A-C); fluorescence spectra were recorded from 600 to 700 nm at an excitation wavelength of 400 nm (excitation/emission slit width: 2.5/10 nm, scan speed: 1200 nm/min, PMT Voltage: 400 V).…”

Section: Sensitivity Of Ce6 For As(iii) Cu 2+ and As(v) Detectionmentioning

confidence: 99%

“…Currently, there are many techniques available for copper and arsenic detection, such as atomic absorption/emission spectrometry (AAS/AES) [ 10 , 11 , 12 ], atomic fluorescence spectroscopy (AFS) [ 13 , 14 ], X-ray fluorescence spectroscopy (XRF) [ 15 , 16 ], inductively coupled plasma–mass spectrometry (ICP–MS) [ 17 , 18 ], electrochemistry [ 19 , 20 , 21 ], ultraviolet–visible absorption spectrometry (UV–Vis)/colorimetry [ 22 , 23 , 24 , 25 ], and fluorescence spectroscopy [ 26 , 27 , 28 , 29 ], etc. These methods have their characteristics and advantages for testing different environmental samples, but the drawbacks of some methods, such as AAS/AES and ICP–MS, which require expensive and large instruments and specialized operators, limit their applications [ 27 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

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Detection of Arsenic(V) by Fluorescence Sensing Based on Chlorin e6-Copper Ion

Luo,

Chen,

Wang

et al. 2024

Molecules

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The high toxicity of arsenic (As) can cause irreversible harm to the environment and human health. In this study, the chlorin e6 (Ce6), which emits fluorescence in the infrared region, was introduced as the luminescence center, and the addition of copper ion (Cu2+) and As(V) provoked a regular change in fluorescence at 652 nm, whereas that of As(III) was 665 nm, which was used to optionally detect Cu2+, arsenic (As(III), and As(V)). The limit of detection (LOD) values were 0.212 μM, 0.089 ppm, and 1.375 ppb for Cu2+, As(III), and As(V), respectively. The developed method can be used to determine Cu2+ and arsenic in water and soil with good sensitivity and selectivity. The 1:1 stoichiometry of Ce6 with Cu2+ was obtained from the Job plot that was developed from UV–visible spectra. The binding constants for Cu2+ and As(V) were established to be 1.248 × 105 M−1 and 2.35 × 1012 M−2, respectively, using B–H (Benesi–Hildebrand) plots. Fluorescence lifetimes, B–H plots, FT–IR, and 1H-NMR were used to postulate the mechanism of Cu2+ fluorescence quenching and As(V) fluorescence restoration and the interactions of the two ions with the Ce6 molecule.

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Section: Resultsmentioning

confidence: 99%

Section: Sensitivity Of Ce6 For As(iii) Cu 2+ and As(v) Detectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Detection of Arsenic(V) by Fluorescence Sensing Based on Chlorin e6-Copper Ion

Luo,

Chen,

Wang

et al. 2024

Molecules

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“…Under optimal reaction conditions, the peak shift of Au NBPs was linear in the logarithm of Fe 2+ concentration in the range of 10 nM–10 μM with a detection limit of 1.29 nM. Zhou et al proposed an effective, selective and multicolor colorimetric detection method for Cu 2+ based on the modulation of peroxidase-like nano-enzyme-mediated etching of Au NRs [ 75 ]. The Cu 2+ –sarcosine complex was chosen as a nano-enzyme that could catalyze the generation of TMB 2+ from TMB in the presence of H 2 O 2 , etching Au NRs, and then achieving the determination of Cu 2+ based on the blueshift of the longitudinal LSPR peak of Au NRs.…”

Section: Sensing Strategy Based On the Lspr Properties Of Au Npsmentioning

confidence: 99%

Chromogenic Mechanisms of Colorimetric Sensors Based on Gold Nanoparticles

Cui

Zhao

2023

Biosensors

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The colorimetric signal readout method is widely used in visualized analyses for its advantages, including visualization of test results, simple and fast operations, low detection cost and fast response time. Gold nanoparticles (Au NPs), which not only exhibit enzyme-like activity but also have the advantages of tunable localized surface plasmon resonance (LSPR), high stability, good biocompatibility and easily modified properties, provide excellent platforms for the construction of colorimetric sensors. They are widely used in environmental monitoring, biomedicine, the food industry and other fields. This review focuses on the chromogenic mechanisms of colorimetric sensors based on Au NPs adopting two different sensing strategies and summarizes significant advances in Au NP-based colorimetric sensing with enzyme-like activity and tunable LSPR characteristics. In addition, the sensing strategies based on the LSPR properties of Au NPs are classified into four modulation methods: aggregation, surface modification, deposition and etching, and the current status of visual detection of various analytes is discussed. Finally, the review further discusses the limitations of current Au NP-based detection strategies and the promising prospects of Au NPs as colorimetric sensors, guiding the design of novel colorimetric sensors.

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