Label-free turn-on fluorescent detection of melamine based on the anti-quenching ability of Hg2+ to gold nanoclusters

Dai, Haichao; Shi, Yan; Wang, Yilin; Sun, Yujing; Hu, Jianfeng; Ni, Pengjuan; Li, Zhuang

doi:10.1016/j.bios.2013.09.034

Cited by 77 publications

(32 citation statements)

References 39 publications

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“…This work used human urine samples for real-time monitoring, and the recoveries ranged from 95% to 104%. Dai et al presented a metal-mediated approach, in which Hg 2+ -mediated BSA-Au NCs were used for determination of melamine [71]. The sensor LOD decreased to 0.15 mM (which is 130 times lower than the estimated value by the US Food and Drug Administration).…”

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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Section: Amentioning

confidence: 99%

Luminescent Metal Nanoclusters for Potential Chemosensor Applications

Shellaiah

Sun

2017

Chemosensors

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“…A number of methods have been reported to synthesize Au NCs by using specific capping agents such as thiol ligands [42], or using templates such as DNA [7,43] and polymers [44]. These Au NCs have been used in the determination of various heavy metals such as Hg 2+ [8,34,35,45,46], Ag + [14,15,38], Cu 2+ [30], Fe 3+ [47], As 3+ [48], and Pb 2+ [49] with advances of being simple, rapid, and economical. Thus it is possible to utilize Au NCs as a fluorescent probe for selective determination of Ag + and Hg 2+ , which is valuable for monitoring the relevant environment and human health [10,50].…”

Section: Introductionmentioning

confidence: 99%

Cytidine-stabilized gold nanocluster as a fluorescence turn-on and turn-off probe for dual functional detection of Ag+ and Hg2+

Zhang

Jiang

Wang

2015

Analytica Chimica Acta

127

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“…Numerous methods have been reported for the determination of melamine, such as capillary electrophoresis [6], high performance liquid chromatography [7], gas chromatographymass spectrometry [8], fluorescence [9], colorimetric method [10,11] surface enhanced Raman scattering [12] or electrochemical technique [13]. Relative to other methods, electrochemical technique has great advantages, such as fast response, time saving, simple operation and high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Determination of melamine in food contact materials using an electrode modified with gold nanoparticles and reduced graphene oxide

Chen

Cheng

et al. 2015

Microchim Acta

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We describe an electrochemical sensor for melamine based on a glassy carbon electrode (GCE) modified with reduced graphene oxide that was decorated with gold nanoparticles (AuNP/rGO). The AuNPs/rGO nanocomposite was synthesized by co-reduction of Au(III) and graphene oxide and characterized by transmission electron microscopy, Raman spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The response of the modified GCE to melamine was investigated by using hexacyanoferrate as an electrochemical reporter. It is found that the electrochemical response to hexacyanoferrate is increasingly suppressed by increasing concentration of melamine. This is attributed to competitive adsorption of melamine at the AuNP/rGO composite through the interaction between the amino groups of melamine and the AuNPs. The presence of rGO, in turn, provides a platform for a more uniform distribution of the AuNPs and enhances the electron transfer rate of the redox reaction. The findings were used to develop a sensitive method for the determination of melamine. Under optimized conditions, the redox peak current of hexacyanoferrate at a working voltage of 171 mV (vs. SCE) is linearly related to the concentration of melamine in 5.0 to 50 nM range. The method was successfully applied to the determination of melamine in food contact materials.

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Label-free turn-on fluorescent detection of melamine based on the anti-quenching ability of Hg2+ to gold nanoclusters

Cited by 77 publications

References 39 publications

Luminescent Metal Nanoclusters for Potential Chemosensor Applications

Luminescent Metal Nanoclusters for Potential Chemosensor Applications

Cytidine-stabilized gold nanocluster as a fluorescence turn-on and turn-off probe for dual functional detection of Ag+ and Hg2+

Determination of melamine in food contact materials using an electrode modified with gold nanoparticles and reduced graphene oxide

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