Glutathione-protected fluorescent gold nanoclusters for sensitive and selective detection of Cu2+

Zhang, Guomei; Li, Yinghui; Xu, Jie; Zhang, Caihong; Shuang, Shaomin; Dong, Chuan; Choi, Martin M.F.

doi:10.1016/j.snb.2013.04.023

Cited by 86 publications

(46 citation statements)

References 40 publications

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“…(I 0 -I)/I 0 linearly increased with C Cu 2+ from 0.02 to 34 μM with a calibration function of (I 0 − I)/I 0 = 0.0278C − 0.0151 (C in μM, R = 0.9984). Table 1 shows a comparison of figures of merits of some reported optical methods for Cu 2+ determination [8,9,15,[18][19][20][21][22][23][24][25]. Our method displays comparable high sensitivity and wide linear range.…”

Section: Resultsmentioning

confidence: 99%

“…The reversibility and recyclability of BSA-Cu NCs-Cu 2+ sensor Although the fluorescence of the BSA-Cu NCs was quenched by Cu 2+ , the quenched fluorescence could be recovered to its A thiourea-based luminol derivative 0-500 and 500-7000 0.27 [25] Glutathione-protected fluorescent gold nanoclusters 100-6250 86 [8] BSA-protected gold nanoclusters complexed with polyelectrolytes 100,000,000-500,000,000…”

Section: Resultsmentioning

confidence: 99%

“…5). Therefore, we further investigated the Cu NCs sensing behavior to three kinds of metal ions, Cu 2+ , Hg 2+ and Fe 3+ in aqueous solution [8].…”

Section: Selectivity Of the Fluorescent Sensor For Cu 2+mentioning

confidence: 99%

“…The allowed concentration of Cu 2+ in drinking water is less than 2 mg/L (32 μM), according to guidelines for drinking water quality of the World Health Organization [3]. Thus, the development of sensitive, selective and flexible methods for the detecting of Cu 2+ ions is highly demanded and of great significance [4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Copper nanoclusters coated with bovine serum albumin as a regenerable fluorescent probe for copper(II) ion

et al. 2014

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We show that copper nanoclusters coated with bovine serum albumin are viable probes for fluorometric determination of Cu(II) ion. The effect is attributed to the paramagnetic nature of Cu(II) bound to BSA. The ions Hg(II) and Fe(III) also give a strong effect but can be discerned by addition of EDTA. The probe can be regenerated by adding an excess of EDTA. The method is capable of detecting Cu(II) in the 0.02-34 μM, and the limit of detection is 1nM. The method was applied to the determination of Cu(II) in spiked water samples. It is rapid, simple, and fairly sensitive. The method may also be applied to detect Hg(II) and Fe(III) if Cu(II) is absent.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…5). Therefore, we further investigated the Cu NCs sensing behavior to three kinds of metal ions, Cu 2+ , Hg 2+ and Fe 3+ in aqueous solution [8].…”

Section: Selectivity Of the Fluorescent Sensor For Cu 2+mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Copper nanoclusters coated with bovine serum albumin as a regenerable fluorescent probe for copper(II) ion

et al. 2014

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“…Due to their molecule-like behavior including discrete electronic states and size-dependent fluorescence, which have been extensively applications in various fields including analysis [19,20], sensing [21] and bio-imaging [22,23]. So far, extensive studies have concentrated on the synthesis of luminescent gold and silver nanoclusters, using various kinds of templates or stabilizing agents such as thiols [24,25], peptides [26], proteins [27,28], DNA [29] and polymers [30]. In contrast to Au and Ag, Cu is extremely cheap, common and widely used in daily life, but its use in preparation of CuNCs is rare [31].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of fluorescent copper nanoclusters for reversible pH-sensors

Qiao

Zhang

et al. 2015

Sensors and Actuators B: Chemical

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Tailoring Amino‐Functionalized Graphitic Carbon‐Encapsulated Gold Core/Shell Nanostructures for the Sensitive and Selective Detection of Copper Ions

Furukawa

Wang

et al. 2017

Adv Funct Materials

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The effective transfer of strong electromagnetic field from the gold core through the coating shell represents the most significant challenge for the applications of plasmonic nanoparticles. This study applies a one‐step arc discharge method to synthesize graphitic carbon‐encapsulated gold nanoparticles (Au@G NPs) functionalized with amino groups uniformly via adding NH3 into He background gas. By tailoring the coating shell into few‐layered graphene, a strong localized surface plasmon resonance (LSPR) absorption band is achieved. The NH3 introduces H radicals to strengthen the LSPR characteristic by etching the coating graphitic shell, as well as provides dissociated NH or NH2 species to functionalize the surfaces with amino groups. With an LSPR‐based colorimetric method, it is demonstrated that trace Cu2+ ions can be detected rapidly with excellent sensitivity (as low as 10 × 10‐9m linearly) and selectivity against other metal ions (Na+, K+, Mg2+, Ca2+, Co2+, Fe2+, Cd2+, Pb2+, and Hg2+ ions) by amino‐functionalized Au@G NPs in water samples.

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Glutathione-protected fluorescent gold nanoclusters for sensitive and selective detection of Cu2+

Cited by 86 publications

References 40 publications

Copper nanoclusters coated with bovine serum albumin as a regenerable fluorescent probe for copper(II) ion

Copper nanoclusters coated with bovine serum albumin as a regenerable fluorescent probe for copper(II) ion

Green synthesis of fluorescent copper nanoclusters for reversible pH-sensors

Tailoring Amino‐Functionalized Graphitic Carbon‐Encapsulated Gold Core/Shell Nanostructures for the Sensitive and Selective Detection of Copper Ions

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