Glutathione-stabilized Cu nanoclusters as fluorescent probes for sensing pH and vitamin B1

Luo, Yawen; Miao, Hong; Yang, Xiaoming

doi:10.1016/j.talanta.2015.07.001

Cited by 96 publications

(34 citation statements)

References 44 publications

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“…In recent years, metal nanoparticles have been paid attention because of their special features such as localized surface plasmon resonance (LSPR), quantum effects, chemical properties, chemical stability and catalytic activity which vary from their bulk properties of metals [28,29,30]. Metal nanoparticles such as silver (Ag 0 ) and gold (Au 0 ) are generally used in pharmaceuticals and electronics, and as biosensors and catalysts due to their versatile features like low toxicity, good biocompatibility, good stability, distance-dependent optical property, high extinction coefficient and strong LSPR properties [31,32,33,34]. However, there are several researcher have suggest that silver nanoparticles can allegedly cause adverse effects on humans as well as the environment.…”

Section: Introductionmentioning

confidence: 99%

L-cysteine modified silver nanoparticles for selective and sensitive colorimetric detection of vitamin B1 in food and water samples

Khalkho

Kurrey

Deb

et al. 2020

Heliyon

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The use of L-cysteine modified silver nanoparticles (Cys-capped AgNPs) as a colorimetric probe for determination of vitamin B1 (thiamine) is described in the present work. This method is based on the measurement of red shift of localized surface plasmon resonance (LSPR) band of Cys-capped AgNPs in the region of 200-800 nm. The color of Cys-capped AgNPs was changed from yellow to colorless by the addition of vitamin B1. The mechanism for detection of vitamin B1 is based on the electrostatic interaction between positively charged vitamin B1, which causes the red shift of LSPR band from 390 nm to 580 nm. The interaction between Cys-capped AgNPs and vitamin B1 was theoretically explored by density function theory (DFT) using LANL2DZ basis sets with help of Gaussian 09 (C.01) program. The morphology, size distribution and optical properties of Cys-capped AgNPs were characterized by transmission electron microscope (TEM), UV-Visible spectrophotometry, Fourier transform infrared spectroscopy (FTIR) and dynamic light scattering (DLS) techniques. The method is linear in the range of 25-500 μg mL À1 with correlation coefficient (R 2) 0.992 and limit of detection of 7.0 μg mL À1. The advantages of using Cys-capped AgNPs as a chemical sensor in colorimetry assay are being simple, low cost and selective for detection of vitamin B1 from food (peas, grapes and tomato) and environmental (river, sewage and pond) water samples.

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Section: Introductionmentioning

confidence: 99%

L-cysteine modified silver nanoparticles for selective and sensitive colorimetric detection of vitamin B1 in food and water samples

Khalkho

Kurrey

Deb

et al. 2020

Heliyon

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“…In addition, the amino groups in glutathione are also reacted as reductive agents to synthesize Cu nanoclusters. Therefore, glutathione is not only a reductive agent but also a protective agent [31][32][33], which is greatly helpful for the preparation of Cu nanoclusters with high stability and fluorescence quantum yields. The selected reaction parameters, such as reaction time, temperature, pH, glutathione concentration and copper precursors, pose great influences on Cu nanoclusters preparation.…”

Section: Preparation and Characterization Of Cu Nanoclustersmentioning

confidence: 99%

Portable smartphone-integrated paper sensors for fluorescence detection of As(III) in groundwater

Liu

Yang

et al. 2020

R. Soc. open sci.

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Arsenic contamination in groundwater is a supreme environmental problem, and levels of this toxic metalloid must be strictly monitored by a portable, sensitive and selective analytical device. Herein, a new system of smartphone-integrated paper sensors with Cu nanoclusters was established for the effective detection of As(III) in groundwater. For the integration system, the fluorescence emissive peak of Cu nanoclusters at 600 nm decreased gradually with increasing As(III) addition. Meanwhile, the fluorescence colour also changed from orange to colourless, and the detection limit was determined as 2.93 nM (0.22 ppb) in a wide detection range. The interfering ions also cannot influence the detection selectivity of As(III). Furthermore, the portable paper sensors based on Cu nanoclusters were fabricated for visual detection of As(III) in groundwater. The quantitative determination of As(III) in natural groundwater has also been accomplished with the aid of a common smartphone. Our work has provided a portable and on-site detection technique toward As(III) in groundwater with high sensitivity and selectivity.

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“…In this work, it was thought that the above observations were attributed to the aggregation of AuNPs induced by the electrostatic interactions between negatively charged AuNPs due to the citrate capping on their surface and positively charged VB1 molecules under the experimental conditions. 13,17 Mechanism studies for the colorimetric detection of VB1 with AuNPs…”

Section: Uv-vis Absorption Spectra Of Aunps-vb1 Systemmentioning

confidence: 99%

“…Up to now, various methods have been employed to assay VB1, such as high performance liquid chromatography (HPLC), 10 chemiluminescence (CL) method, 11 absorption spectrometric assay, 12,13 potentiometric assay, 14 uorimetry, [15][16][17][18][19][20] resonance Rayleigh scattering spectral method 21 and so on. Among these analytical techniques, the problems like inevitable use of organic solvents in HPLC and CL, poor reproducibility of potentiometric assay, expensive instruments for resonance Rayleigh scattering spectral method, special competitive reaction between VB1 and uorescent materials with the metal ions in some extent limited their wide applications.…”

Section: Introductionmentioning

confidence: 99%

Rapid and visual readout of vitamin B1 based on the electrostatic interaction induced aggregation of gold nanoparticles

et al. 2018

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Glutathione-stabilized Cu nanoclusters as fluorescent probes for sensing pH and vitamin B1

Cited by 96 publications

References 44 publications

L-cysteine modified silver nanoparticles for selective and sensitive colorimetric detection of vitamin B1 in food and water samples

L-cysteine modified silver nanoparticles for selective and sensitive colorimetric detection of vitamin B1 in food and water samples

Portable smartphone-integrated paper sensors for fluorescence detection of As(III) in groundwater

Rapid and visual readout of vitamin B1 based on the electrostatic interaction induced aggregation of gold nanoparticles

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