Selective Fluorogenic and Chromogenic Probe for Detection of Silver Ions and Silver Nanoparticles in Aqueous Media

Chatterjee, Amrita; Santra, Mithun; Won, Nayoun; Kim, Sungjee; Kim, Jae Kyung; Kim, Seung Bin; Ahn, Kyo Han

doi:10.1021/ja807230c

Cited by 363 publications

(199 citation statements)

References 29 publications

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“…2 While silver can be measured by instrumentation methods such as ICP-MS, it is also important to develop biosensors for on-site detection, which may also help recover this valuable metal. 3,4 Over the past two decades, DNA has emerged as a highly versatile platform for metal sensing based on either metal/nucleobase binding interactions or metal-assisted DNAzyme catalysis. [5][6][7][8][9][10] RNA-cleaving DNAzymes are particularly interesting since they can achieve extremely high metal sensitivity and are versatile in biosensor design.…”

Section: Introductionmentioning

confidence: 99%

A Silver DNAzyme

2016

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Silver is a very common heavy metal, and its detection is of significant analytical importance.DNAzymes are DNA-based catalysts; they typically recruit divalent and trivalent metal ions for catalysis. Herein, we report a silver-specific RNA-cleaving DNAzyme named Ag10c obtained after six rounds of in vitro selection. Ag10c displays a catalytic rate of 0.41 min -1 with 10 µM Ag + at pH 7.5 with 200 mM NaNO3, while its activity is completely inhibited with the same concentration of NaCl. Ag10c is highly specific for Ag + among all the tested metals. A catalytic beacon biosensor is designed by labeling a fluorophore and a quencher on the DNAzyme.Fluorescence enhancement is observed in the presence of Ag + with a detection limit of 24.9 nM Ag + . The sensor shows a similar analytical performance in Lake Huron water. This is the first monovalent transition metal dependent RNA-cleaving DNAzyme. Apart from its biosensor application, this study strengthens the idea of exploring beyond the traditional understanding of multivalent ion dependent DNAzyme catalysis.3

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Section: Introductionmentioning

confidence: 99%

A Silver DNAzyme

2016

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“…Chatterjee et al [212] developed a rhodamine-based fluorogenic and chromogenic probe for Ag(I) detection, also applicable for the detection of Ag NPs when oxidized with hydrogen peroxide in acidic conditions. The sensing mechanism was based on an irreversible process promoted by coordination of Ag(I) to the iodide of the probe, which was accompanied by both colour and fluorescence changes.…”

Section: Chemical Sensorsmentioning

confidence: 99%

Detection, characterization and quantification of inorganic engineered nanomaterials: A review of techniques and methodological approaches for the analysis of complex samples

Laborda

Bolea

Cepriá

et al. 2016

Analytica Chimica Acta

331

170

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The increasing demand of analytical information related to inorganic engineered nanomaterials requires the adaptation of existing techniques and methods, or the development of new ones.The challenge for the analytical sciences has been to consider the nanoparticles as a new sort of analytes, involving both chemical (composition, mass and number concentration) and physical information (e.g. size, shape, aggregation). Moreover, information about the species derived from the nanoparticles themselves and their transformations must also be supplied. Whereas techniques commonly used for nanoparticle characterization, such as light scattering techniques, show serious limitations when applied to complex samples, other well-established techniques, like electron microscopy and atomic spectrometry, can provide useful information in most cases. Furthermore, separation techniques, including flow field flow fractionation, capillary electrophoresis and hydrodynamic chromatography, are moving to the nano domain, mostly hyphenated to inductively coupled plasma mass spectrometry as element specific detector.Emerging techniques based on the detection of single nanoparticles by using ICP-MS, but also coulometry, are in their way to gain a position. Chemical sensors selective to nanoparticles are in their early stages, but they are very promising considering their portability and simplicity.Although the field is in continuous evolution, at this moment it is moving from proofs-of-2 concept in simple matrices to methods dealing with matrices of higher complexity and relevant analyte concentrations. To achieve this goal, sample preparation methods are essential to manage such complex situations. Apart from size fractionation methods, matrix digestion, extraction and concentration methods capable of preserving the nature of the nanoparticles are being developed. This review presents and discusses the state-of-the-art analytical techniques and sample preparation methods suitable for dealing with complex samples. Single-and multimethod approaches applied to solve the nanometrological challenges posed by a variety of stakeholders are also presented.

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“…Graphene oxide (GO), a two-dimensional nanosheet produced by the oxidation of graphene, has attracted great interest because of its unique characteristics, such as good dispersibility and facile surface functionality [8,9]. For a long time it has been well known that silver ions have the ability to kill harmful bacteria [10][11][12]. Silver has always been regarded as a precious metal.…”

Section: Introductionmentioning

confidence: 99%

A graphene-organic composite as a fluorescent chemosensor for Ag+

Bhuvanesh¹,

Velmurugan²,

Suresh³

et al. 2016

Nanosystems: Phys. Chem. Math.

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A novel reduced graphene oxide (rGO) decorated organic binol based receptor ((S)-1) has been designed and synthesized. The resulting nanocomposite (rGO-(S)-1) material was then utilized as a selective fluorescent chemosensor for Ag + ion in aqueous media at physiological pH. In addition, the nanocomposite showed no cross-reaction with any of the potential interfering metal ions. The reduced graphene oxideorganic nanocomposite was characterized using various spectroscopic, microscopic and analytical studies.

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Selective Fluorogenic and Chromogenic Probe for Detection of Silver Ions and Silver Nanoparticles in Aqueous Media

Cited by 363 publications

References 29 publications

A Silver DNAzyme

A Silver DNAzyme

Detection, characterization and quantification of inorganic engineered nanomaterials: A review of techniques and methodological approaches for the analysis of complex samples

A graphene-organic composite as a fluorescent chemosensor for Ag+

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