The synthesis of gold nanoclusters with high stability and their application in fluorometric detection for Hg2+ and cell imaging

Xie, Ruyan; Su, Daizhong; Song, Ying; Sun, Peng; Mao, Baodong; Tian, Miaomiao; Chai, Fang

doi:10.1016/j.talanta.2023.124573

Cited by 13 publications

(2 citation statements)

References 36 publications

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“…The hollow assembly nanospheres with significantly reduced fluorescence quenching caused by QD aggregation present promising applications in drug delivery and biological imaging. In addition, the fluorescence enhancement of nanoclusters also has great potential in improving sensor sensitivity and improving photocatalytic efficiency. − …”

Section: Discussionmentioning

confidence: 99%

Fluorescence Enhancement of CdS:Ag Quantum Dots Co-Assembled with Au Nanoparticles in a Hollow Nanosphere Form

Zhu,

Ji,

et al. 2024

Langmuir

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Colloidal quantum dots (QDs) have exceptional fluorescence properties. Overcoming aggregation-induced quenching and enhancing the fluorescence of colloidal QDs have remained a challenging issue in this field. In this study, composite hollow nanospheres composed of Au nanoparticles (NPs) and CdS:Ag-doped QDs were successfully constructed through controlled microemulsion-based cooperative assembly. This method harnessed the localized surface plasmon resonance (LSPR) effect of Au NPs nearby doped QDs, resulting in enhanced doped QD fluorescence and the observation of the Purcell effect. The composite hollow nanospheres show a fluorescence enhancement compared to that of the pure CdS:Ag QDs. The enhanced fluorescence was demonstrated to come from the synergetic enhancement of the absorption and emission transition of the doped QDs. This approach provides a feasible technological pathway to address the challenge of improving the fluorescence performance of the doped QDs.

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Section: Discussionmentioning

confidence: 99%

Fluorescence Enhancement of CdS:Ag Quantum Dots Co-Assembled with Au Nanoparticles in a Hollow Nanosphere Form

Zhu,

Ji,

et al. 2024

Langmuir

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“…Metal nanoclusters (MNCs) possessing inherent intriguing features, viz., molecule-like discrete energy levels, ultrasmall size, and remarkable fluorescence (Fl), continue gaining attention among researchers. − Their exceptional inherent properties render them an extensive platform for offering various applications like sensing toxic metal ions − and hazardous molecules, , bioimaging, photodynamic theory, catalysis, and optoelectronics . MNCs, particularly with red or near-infrared (NIR) emission, possess remarkable advantages in contrast to lower wavelength emitting MNCs due to their beneficial properties like deep cell penetrating power, minimizing the possibility of light scattering, and bypassing autofluorescence, − augmenting their utilization for various applications ranging from sensing of environmental contaminants to biologically hazardous molecules. − MNCs capped by proteins offer excellent biocompatibility and optical stability. − Following the first report of bovine serum albumin (BSA)-capped gold nanoclusters (AuNCs), several other proteins, e.g., lysozyme (LYS), ovalbumin, insulin, pea protein, and pepsin, have been utilized for capping many other MNCs.…”

Section: Introductionmentioning

confidence: 99%

BSA-Capped Dual-Emissive Silver Nanoclusters for Detection of IO₄^– and Cu²⁺ Ions

Sarkar,

Nandi,

Barnwal

et al. 2023

ACS Appl. Nano Mater.

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Dual-emissive protein-capped metal nanoclusters are emerging nanoprobes for ratiometric sensing. Here, we report dual-emissive bovine serum albumin (BSA)-capped silver nanoclusters (AgNCs) with a blue emission band at 450 nm and a far-red emission band at 680 nm. The blue emission is attributed to the BSA capping, while the far-red emission originates from the AgNCs. The intensity ratio of the two bands is susceptible to the presence of IO4 – and Cu2+, allowing selective detection of these analytes with a limit of detection (LOD) of 18.8 and 21.6 nM, respectively. These two analytes display different effects on the emission bands. The blue emission band increases with simultaneous diminution of the far-red band in the presence of IO4 –; however, only the far-red emission band decreases in the presence of Cu2+ without altering the blue emission. Both the analytes manifested distinct visual changes in the emission color of the AgNCs solution under a UV lamp, which can also be evident from the shift of the Commission Internationale d’Eclairage (CIE) coordinates from (0.48, 0.32) to (0.18, 0.17) and (0.24, 0.25) for IO4 – and Cu2+, respectively. IO4 – induced a conformational change in BSA, intensifying the blue emission band along with a dynamic quenching of the AgNCs’ emission at 680 nm. In contrast, Cu2+ triggered only a metal exchange method-based quenching of the 680 nm emission with almost no effect on the BSA capping. A smartphone-based on-site detection of IO4 – and Cu2+ was also achieved. Inspired by the contrasting fluorescence (Fl) response signals of AgNCs toward IO4 – concentration, a simple logic gate circuit was constructed. This investigation will provide important insight into the one-pot synthesis of dual-emissive silver nanoclusters and the ratiometric detection mechanism of IO4 – and Cu2+.

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Detection and elimination of tetracycline: Constructing multi-mode carbon dots for ultra-sensitive visual assay and CDs/TiO2 for photocatalytic degradation

Xie,

Song,

Wang

et al. 2024

Applied Surface Science

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The synthesis of gold nanoclusters with high stability and their application in fluorometric detection for Hg2+ and cell imaging

Cited by 13 publications

References 36 publications

Fluorescence Enhancement of CdS:Ag Quantum Dots Co-Assembled with Au Nanoparticles in a Hollow Nanosphere Form

Fluorescence Enhancement of CdS:Ag Quantum Dots Co-Assembled with Au Nanoparticles in a Hollow Nanosphere Form

BSA-Capped Dual-Emissive Silver Nanoclusters for Detection of IO₄^– and Cu²⁺ Ions

Detection and elimination of tetracycline: Constructing multi-mode carbon dots for ultra-sensitive visual assay and CDs/TiO2 for photocatalytic degradation

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The synthesis of gold nanoclusters with high stability and their application in fluorometric detection for Hg2+ and cell imaging

Cited by 13 publications

References 36 publications

Fluorescence Enhancement of CdS:Ag Quantum Dots Co-Assembled with Au Nanoparticles in a Hollow Nanosphere Form

Fluorescence Enhancement of CdS:Ag Quantum Dots Co-Assembled with Au Nanoparticles in a Hollow Nanosphere Form

BSA-Capped Dual-Emissive Silver Nanoclusters for Detection of IO4– and Cu2+ Ions

Detection and elimination of tetracycline: Constructing multi-mode carbon dots for ultra-sensitive visual assay and CDs/TiO2 for photocatalytic degradation

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BSA-Capped Dual-Emissive Silver Nanoclusters for Detection of IO₄^– and Cu²⁺ Ions