A promising gold nanocluster fluorescent sensor for the highly sensitive and selective detection of S2−

Cui, Ma-Lin; Liu, Jiaming; Wang, Xinxing; Lin, Liping; Li, Jiao; Zheng, Zishan; Zhang, Lihong; Jiang, Shu-Lian

doi:10.1016/j.snb.2013.05.098

Cited by 87 publications

(41 citation statements)

References 57 publications

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“…These results implied that AuNPs with various surface coatings should have the same active site of Au(I), and thus their peroxidase-like activities could all be inhibited by S 2− . It should be noted that excess S 2− can also lead to aggregation of AuNPs [18,19], and thus the active sites may be reduced by increasing the size of AuNPs. To avoid this problem, the added amount of S 2− was carefully controlled to inhibit nearly 90% of the peroxidase-like activity (see Figure S2).…”

Section: Xps Measurements Of Aunps Without and With S 2− Additionmentioning

confidence: 99%

Revealing the Active Site of Gold Nanoparticles for the Peroxidase-Like Activity: The Determination of Surface Accessibility

Liu

Chen

et al. 2019

Catalysts

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Despite the fact that the enzyme-like activities of nanozymes (i.e., nanomaterial-based artificial enzymes) are highly associated with their surface properties, little is known about the catalytic active sites. Here, we used the sulfide ion (S2−)-induced inhibition of peroxidase-like activity to explore active sites of gold nanoparticles (AuNPs). The inhibition mechanism was based on the interaction with Au(I) to form Au2S, implying that the Au(I) might be the active site of AuNPs for the peroxidase-like activity. X-ray photoelectron spectroscopy (XPS) analysis showed that the content of Au(I) on the surface of AuNPs significantly decreased after the addition of S2−, which might be contributed to the more covalent Au–S bond in the formation of Au2S. Importantly, the variations of Au(I) with and without the addition of S2− for different surface-capped AuNPs were in good accordance with their corresponding peroxidase-like activities. These results confirmed that the accessible Au(I) on the surface was the main requisite for the peroxidase-like activity of AuNPs for the first time. In addition, the use of S2− could assist to determine available active sites for different surface modified AuNPs. This work not only provides a new method to evaluate the surface accessibility of colloidal AuNPs but also gains insight on the design of efficient AuNP-based peroxidase mimics.

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Section: Xps Measurements Of Aunps Without and With S 2− Additionmentioning

confidence: 99%

Revealing the Active Site of Gold Nanoparticles for the Peroxidase-Like Activity: The Determination of Surface Accessibility

Liu

Chen

et al. 2019

Catalysts

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“…GSH-Au NCs [60] were initially titrated with copper(II) phthalocyanine [Cu(PcTs)]; analysis of the results revealed their turn-off effect on each other, leading to the recovery of [Cu(PcTs)] fluorescence in the presence of CN − ions and the decrease in the fluorescence intensity of gold nanoclusters (Au NCs). Thereafter, researchers successfully applied BSA-protected Au NCs as probes for identifying anions, such as hypochlorite (HOCl), sulfide ion (S 2− ), nitrite ion (NO2 -), and pyrophosphate ion (P2O7 4-, PPi), with affordable linear detection ranges and limits [61][62][63][64]. Pyrophosphate ion (P2O7 4-, PPi) detection [64] was a fluorescent "turn-on" sensor via the BSA-Au NCs-Cu 2+ mediated complex system.…”

Section: Amentioning

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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“…With the rapid development of industrial and agricultural productions, the use of sulfur (S)‐containing substances such as coal and the unreasonable waste discharges as industrial outputs has caused serious environmental pollution, which is severely threatening human survival 1 . Toxic effects on aquatic organisms in rivers can be caused by a high S 2− concentration, thereby affecting the entire marine biological system 2 . Once S 2− concentrations exceed the average level in human bodies, a series of cardiovascular diseases such as liver damages, cancers, and other diseases will occur 3 .…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of up‐conversionCit‐NaYF₄:Yb,Tm @phenol‐formaldehyde resin@Ag composites for the sensitive detection ofS²⁻

Sun

Yang

Wang

et al. 2020

J of Applied Polymer Sci

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In this work, we synthesized the core-shell structure citric acid-modified upconversion luminescent nanoparticles (Cit-NaYF 4 :Yb,Tm) (denoted as UC)@ polymer of phenol-formaldehyde resin (PFR) particles. Ag nanoparticles were successfully loaded onto the PFR's shell by direct reduction of AgNO 3 in situ with rich hydroxyl groups in PFR and a new application of the UC@PFR@Ag composites for detection of S 2− was investigated. A good linear relationship between the fluorescence intensity of as-synthesis of UC@PFR@Ag composites and the concentration of S 2− could be found within the range of 2-100 nM (R 2 = 0.9929) with a limit of detection of 0.67 nM. The values of S 2− content in actual water samples obtained with the proposed method are much closer to unity as compared to the corresponding values obtained with the UV method.

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A promising gold nanocluster fluorescent sensor for the highly sensitive and selective detection of S2−

Cited by 87 publications

References 57 publications

Revealing the Active Site of Gold Nanoparticles for the Peroxidase-Like Activity: The Determination of Surface Accessibility

Revealing the Active Site of Gold Nanoparticles for the Peroxidase-Like Activity: The Determination of Surface Accessibility

Luminescent Metal Nanoclusters for Potential Chemosensor Applications

Facile synthesis of up‐conversionCit‐NaYF₄:Yb,Tm @phenol‐formaldehyde resin@Ag composites for the sensitive detection ofS²⁻

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A promising gold nanocluster fluorescent sensor for the highly sensitive and selective detection of S2−

Cited by 87 publications

References 57 publications

Revealing the Active Site of Gold Nanoparticles for the Peroxidase-Like Activity: The Determination of Surface Accessibility

Revealing the Active Site of Gold Nanoparticles for the Peroxidase-Like Activity: The Determination of Surface Accessibility

Luminescent Metal Nanoclusters for Potential Chemosensor Applications

Facile synthesis of up‐conversionCit‐NaYF4:Yb,Tm @phenol‐formaldehyde resin@Ag composites for the sensitive detection ofS2−

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Facile synthesis of up‐conversionCit‐NaYF₄:Yb,Tm @phenol‐formaldehyde resin@Ag composites for the sensitive detection ofS²⁻