A gold-silver bimetallic nanocluster-based fluorescent probe for cysteine detection in milk and apple

Zhang, Baowen; Chen, Lianfang; Zhang, Maosen; Deng, Caixia; Yang, Xiupei

doi:10.1016/j.saa.2022.121345

Cited by 20 publications

(5 citation statements)

References 45 publications

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“…The Ag 3d pattern exhibited two peaks at 374.1 eV (Ag 3d 3/2 ) and 368.1 eV (Ag 3d 5/2 ), and the latter was deconvoluted into Ag (I) at 368.4 eV and Ag (0) at 367.7 eV (Figure 3E). The predominant Ag species in the GSH@AuAg NCs was identified as Ag (I) (∼63.7%), indicating the successful doped synthesis of GSH@AuAg NCs [25,26]. FT-IR studies of GSH-AuAg NCs also demonstrated the presence of GSH.…”

Section: Synthesis and Characterization Of Gsh@auag Ncsmentioning

confidence: 92%

NaBH4-Mediated Co-Reduction Synthesis of Glutathione Stabilized Gold/Silver Nanoclusters for Detection of Magnesium Ions

Chen

Zhu

et al. 2023

Chemosensors

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The content of magnesium ions (Mg2+) in drinking water is relatively high and the excessive Mg2+ ingestion may lead to pathological lesions in the human body system. At present, the detection of Mg2+ still relies on costly devices or/and complex organic fluorescence probes. To solve this problem, this work proposed a NaBH4-mediated co-reduction strategy for the synthesis of glutathione-stabilized bimetallic AuAg nanoclusters (GSH@AuAg NCs) with performance recognition to Mg2+. The preparation of GSH@AuAg NCs was simple and rapid and could be performed at mild conditions. The reaction parameters and sampling orders were optimized to understand the formation mechanism of GSH@AuAg NCs. The GSH@AuAg NCs exhibited a sensitive “light on” fluorescence response to Mg2+ due to the re-molding of the interfacial physicochemical environment following the Mg2+ coordination, which affected the surface charge transfer process, and thus led to a novel method for fluorescence detection of Mg2+ with admirable selectivity for Mg2+. The proposed method showed a detection limit of 0.2 μM, and its practical utility for the detection of Mg2+ in a real sample of purified drinking water was also demonstrated, confirming its practicability in monitoring the Mg2+ concentration in drinking water.

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Section: Synthesis and Characterization Of Gsh@auag Ncsmentioning

confidence: 92%

NaBH4-Mediated Co-Reduction Synthesis of Glutathione Stabilized Gold/Silver Nanoclusters for Detection of Magnesium Ions

Chen

Zhu

et al. 2023

Chemosensors

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“…43 It is therefore significant to selectively and sensitively detect the additional cysteine levels in food matrices like milk. Several analytical methods such as electrochemical determination, 44,45 colourimetric determination, 46 Fourier transform infrared spectroscopy, 47 and fluorescence probes have been applied, [48][49][50][51] however, to the best of our knowledge, there is no reported SERS-based sensing technique for the direct detection of cysteine in a milk sample, especially detecting the cysteine in the undiluted milk sample.…”

Section: Introductionmentioning

confidence: 99%

Lubricin (PRG-4) anti-fouling coating for surface-enhanced Raman spectroscopy biosensing: towards a hierarchical separation system for analysis of biofluids

Han,

Silva,

Russo

et al. 2024

Analyst

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“…19 Gold nanoclusters have the advantages of a large Stokes shift, 20 good biocompatibility, 21 good catalytic performance, 22 and low toxicity. 5 Our research group 23 has focused on the development of new gold nanoclusters and observed that gold nanoclusters can achieve better fluorescence and stability by doping with Ag due to bimetallic synergism 24 synthesized AuAg NCs show much better practical applications.…”

Section: ■ Introductionmentioning

confidence: 99%

Chameleon-like Response Mechanism of Gold–Silver Bimetallic Nanoclusters Stimulated by Sulfur Ions and Their Application in Visual Fluorescence Sensing

Zhang,

Wang,

Wang

et al. 2024

Anal. Chem.

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Herein, 2-mercapto-5-benzimidazolesulfonate acid sodium salt dihydrate (MBZS)-protected gold−silver bimetallic nanoclusters, named MBZS-AuAg NCs, were synthesized. Interestingly, we found that MBZS-AuAg NCs solutions can exhibit different fluorescence color changes under sulfide stimulation. A series of modern analytical testing techniques were used to explore the interaction mechanism between MBZS-AuAg NCs and sulfide. Sulfide ions can not only cause MBZS-AuAg NCs to exhibit rich fluorescence color changes similar to those of a chameleon but also have four linear relationships between the response intensity and sulfide concentration. A widerange sulfide fluorescence sensing platform was constructed based on four linear segments with different fluorescence color responses. This sensing platform can be directly used for the determination of S 2− with a detection limit as low as 11 nM. The portable test paper based on MBZS-AuAg NCs can realize the visual and rapid detection of gaseous hydrogen sulfide with a detection limit of 100 ppb (v/v). The wide detection range of the proposed method not only allows it to be used as an alternative method for sulfide detection in environmental samples but also has potential applications in the rapid detection and early warning of hydrogen sulfide gas in industrial and mining scenarios.

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A gold-silver bimetallic nanocluster-based fluorescent probe for cysteine detection in milk and apple

Cited by 20 publications

References 45 publications

NaBH4-Mediated Co-Reduction Synthesis of Glutathione Stabilized Gold/Silver Nanoclusters for Detection of Magnesium Ions

NaBH4-Mediated Co-Reduction Synthesis of Glutathione Stabilized Gold/Silver Nanoclusters for Detection of Magnesium Ions

Lubricin (PRG-4) anti-fouling coating for surface-enhanced Raman spectroscopy biosensing: towards a hierarchical separation system for analysis of biofluids

Chameleon-like Response Mechanism of Gold–Silver Bimetallic Nanoclusters Stimulated by Sulfur Ions and Their Application in Visual Fluorescence Sensing

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