One-step synthesis of orange fluorescent copper nanoclusters for sensitive and selective sensing of Al3+ ions in food samples

Hu, Xue; Mao, Xuanxiang; Zhang, Xiaodan; Huang, Yuming

doi:10.1016/j.snb.2017.03.050

Cited by 91 publications

(34 citation statements)

References 56 publications

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“…The XPS results show the main peaks of Cu 0 (nZVCu) at a binding energy of 2p 3/2 (932.4 eV) and 2p 1/2 (952.3 eV) which confirm the successful formation of nZVCu, consistent to the previous studies. The XPS results showing small peaks at 943.2 and 962.4 eV which may be ascribed to 3d 9 shell of the Cu ions, which suggest the presence of a small concentration of oxides of copper and is inconsistent with the XRD results. [35,36]…”

Section: ¼ Kl Bcosqcontrasting

confidence: 59%

“…[6] To date, many biosensors based on copper and copper oxide nanomaterials have been extensively explored for enhanced H 2 O 2 reduction. [7][8][9] There is considerable interest in the use of ionic liquid owing to its specific characteristics, such as low volatility, relatively high ionic conductivity, chemical and thermal stability and its ability to dissolve a variety of compounds through appropriate modification of the anions and cations. [10] Inspired by the unique features of room temperature ionic liquid (RT-ILs), RT-ILs have been employed as an appealing medium for the preparation and stabilization of reactive catalytic species or reaction intermediates through their interaction with metals to achieve a good catalytic performance of the system which is not possible in common solvents.…”

Section: Introductionmentioning

confidence: 99%

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Colorimetric Sensing of Hydrogen Peroxide Using Ionic‐Liquid‐Sensitized Zero‐Valent Copper Nanoparticle (nZVCu)

et al. 2020

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In this study, a stable ionic liquid (IL) mediated zero-valent copper nanoparticle (nZVCu), namely IL-nZVCu, has been evaluated for catalytic properties towards H 2 O 2 -mediated TMB (3, 3',5,5'-tetramethylbenzidine) reaction under normal conditions of temperature and pH. The various analytical techniques like Fourier Transform Infrared Spectroscopy (FT-IR), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), X-ray powder diffraction (XRD), scanning electron microscope (SEM), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) were used to confirm the structure and nano size of nZVCu. The simple protic IL 1-hydrogen-3-methylimidazolium acetate (HmimOAc) with its cation 1-methylimidazole and anion acetate was synthesized, characterized, and coated on nZVCu to prepared IL-nZVCu. As a novel mimic peroxidase, IL-nZVCu could quickly catalyze the oxidation reaction of specific chromogenic substrate TMB, when H 2 O 2 acts as an oxidant, followed by a remarkable color change in the solution measured by UV/Vis Spectrophotometry. The enhanced catalytic activity and significant color change were greatly dependent on the catalyst dosage, the volume of IL taken, incubation time, H 2 O 2 concentration, and TMB concentration. Also, IL-nZVCu showed no response toward ascorbic acid, cholesterol, dopamine, urea and uric acid. Based on these findings, IL-nZVCu could be effectively used for visual colorimetric sensing of H 2 O 2 with a limit of detection (LOD) of 44 μM over the dynamic linear range from 40 μM to 1000 μM concentration.

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Section: ¼ Kl Bcosqcontrasting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Colorimetric Sensing of Hydrogen Peroxide Using Ionic‐Liquid‐Sensitized Zero‐Valent Copper Nanoparticle (nZVCu)

et al. 2020

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“…The development of diverse fluorescent Cu NCs toward sensory application is a more exciting concept. In this context, Prof. Huang's research group attested dithiothreitol (DTT)-capped Cu NCs (DTT-Cu NCs) with orange fluorescence for the determination of Al 3+ ions [134]. The detection mechanism was based on the aggregation-induced fluorescence enhancement with Al 3+ ions.…”

Section: Sensor Applications Of Cu Ncsmentioning

confidence: 99%

Luminescent Metal Nanoclusters for Potential Chemosensor Applications

Shellaiah

Sun

2017

Chemosensors

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Studies of metal nanocluster (M-NCs)-based sensors for specific analyte detection have achieved significant progress in recent decades. Ultra-small-size (<2 nm) M-NCs consist of several to a few hundred metal atoms and exhibit extraordinary physical and chemical properties. Similar to organic molecules, M-NCs display absorption and emission properties via electronic transitions between energy levels upon interaction with light. As such, researchers tend to apply M-NCs in diverse fields, such as in chemosensors, biological imaging, catalysis, and environmental and electronic devices. Chemo-and bio-sensory uses have been extensively explored with luminescent NCs of Au, Ag, Cu, and Pt as potential sensory materials. Luminescent bi-metallic NCs, such as Au-Ag, Au-Cu, Au-Pd, and Au-Pt have also been used as probes in chemosensory investigations. Both metallic and bi-metallic NCs have been utilized to detect various analytes, such as metal ions, anions, biomolecules, proteins, acidity or alkalinity of a solution (pH), and nucleic acids, at diverse detection ranges and limits. In this review, we have summarized the chemosensory applications of luminescent M-NCs and bi-metallic NCs.

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“…Values for the relevant core-level binding energies were obtained from curve tting of the photoelectron emission lines using a symmetrical Gaussian-Lorentzian function. Two components could be tted for chromium: Al-O bond (73.7-74.5 eV) 29,30 and Cr(OH) 3 (577.3 AE 0.2 eV). [31][32][33] 3 Results and discussion Fig.…”

Section: Characterization Experimentsmentioning

confidence: 99%