Fluorescent Silver Nanoclusters in Condensed DNA

Volkov, Ivan L.; Рамазанов, Р. Р.; Ubyĭvovk, E. V.; Rolich, Valerij I.; Kononov, Alexei I.; Kasyanenko, N. A.

doi:10.1002/cphc.201300673

Cited by 16 publications

(15 citation statements)

References 45 publications

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“…It is interesting to note that together with the synthesis of nanoparticles on DNA (Figure 13(a)), at low Ag + concentration in DNA solutions with the shortage of Ag + ions outside the helix, the reduction of silver ions causes the formation of the luminescent silver nanoclusters (Figure 13(b)). The small size of silver nanoclusters (up to 20 atoms) prevents the analysis of the systems with AFM technique [13]. At small concentrations of silver ions and the reductant in DNA solutions, the fluorescence of silver nanoclusters is observed.…”

Section: Journal Of Nanomaterialsmentioning

confidence: 99%

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DNA Modified with Metal Nanoparticles: Preparation and Characterization of Ordered Metal-DNA Nanostructures in a Solution and on a Substrate

Kasyanenko

Varshavskii

Ikonnikov

et al. 2016

Journal of Nanomaterials

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DNA interaction with silver and aluminum nanoparticles in a solution has been investigated with the AFM, SEM, dynamic light scattering, viscometry, and spectral methods. The comparison of DNA interaction with nanoparticles synthesized by the reduction of Ag + ions and with nanoparticles obtained by the electric discharge plasma method was done. DNA metallization in a solution and on -silicon surface with metal nanoparticles or by the reduction of silver ions after their binding to DNA was executed and studied. It was shown that DNA strands with regular location of silver or aluminum nanoparticles can be prepared. The conditions for the formation of silver nanoparticles and silver nanoclusters on DNA were analyzed.

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Section: Journal Of Nanomaterialsmentioning

confidence: 99%

“…In contrast to nanoparticles, the smallest luminescence metal nanoclusters without plasmonic resonance can also be used for the bioimaging and other applications [8][9][10][11][12][13]. The noble metal quantum clusters (NMQCs) have intriguing photophysical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

DNA Modified with Metal Nanoparticles: Preparation and Characterization of Ordered Metal-DNA Nanostructures in a Solution and on a Substrate

Kasyanenko

Varshavskii

Ikonnikov

et al. 2016

Journal of Nanomaterials

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“…Thus, the library of DNA-templated AgNCs contains spectrally tunable, photostable and strongly absorbing efficient emitters with large Stokes shifts. Particularly in microscopy settings, where background emission and scattering are significant concerns, these are ideal emitter characteristics121314151617. At the same time the potential biocompatibility and low material cost makes these clusters highly attractive, for example, to sensor applications and bio-labelling11181920212223.…”

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confidence: 99%

Ultrafast coherence transfer in DNA-templated silver nanoclusters

et al. 2017

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DNA-templated silver nanoclusters of a few tens of atoms or less have come into prominence over the last several years due to very strong absorption and efficient emission. Applications in microscopy and sensing have already been realized, however little is known about the excited-state structure and dynamics in these clusters. Here we report on a multidimensional spectroscopy investigation of the energy-level structure and the early-time relaxation cascade, which eventually results in the population of an emitting state. We find that the ultrafast intramolecular relaxation is strongly coupled to a specific vibrational mode, resulting in the concerted transfer of population and coherence between excited states on a sub-100 fs timescale.

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“…In particular, the energy of the interaction of silver with C=O groups of the nitrogen bases does not exceed 95 kJ/mol, while this parameter in the formation of chelate structures may reach 413 kJ/mol. The theoretical modeling results were experimentally supported in a study of hybrid nanoparticles prepared from silver clusters with a shell consisting of DNA macromolecules compacted by polyallylamine [159]. The polymer shell protects the silver clusters from solvation and oxidation and also provides stability for the structure and luminescent properties of the composites (emission bands with maxima~590 and~680 nm at l exc = 280 nm).…”

Section: Hybrid Systems With An Organic Polymer Matrixmentioning

confidence: 83%

Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles

Tolstov

2015

Theor Exp Chem

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The major methods for the preparation of silver-containing polymer composite nanosystems and the formation of their hybrid structure are examined. Special attention is focused on a new class of silver-containing hybrid systems, namely, organic-inorganic coordination polymers, obtained by the self-assembly of silver complexes. The effect of intercomponent interaction on the structure and properties of these hybrid composites was examined.The creation of new improved materials is an important goal of modern chemistry and materials science. Polymer composites with hybrid structure are among such materials and hold interest since they display a combination of properties characteristic for each of the inorganic and organic components [1-3] and, in some cases, unique properties related to the specific nature of their structure [4]. From a modern viewpoint, hybrid organic-inorganic materials are formed by the combination of components, differing in their chemical nature, on a molecular or nano level through formation of chemical bonds ((non)covalent bonds, hydrogen bonding, and donor-acceptor bonds) or weaker physical bonds (van der Waals and electrostatic interactions) [5]. Special attention is given to the stability of the nanodispersed components due to interaction between the nanophase and various stabilizers [6]. The interest in silver-containing hybrid polymer composite materials, including nanocomposites, which, by their very nature, are a priori hybrid systems, is attributed to a set of properties of the matrix itself, which often possesses hybrid structure, properties of silver in ionic and nanodispersed forms, and new properties related to the appearance of hybrid silver-polymer structures [7,8]. Special interest is presently found in bionanocomposites derived from biopolymers and silver nanoparticles (SN), which display specific physicochemical properties, in particular, electrochemical, photochemical, and catalytic properties highly dependent on the dimensions and polydispersion of the nanophase [9, 10] as well as biological activity due to the ionization of the metal atoms in the presence of H 2 O/O 2 and the interaction between the SN surface and functional groups of the various biomolecules [11].In light of the important role of the polymer matrix in formation of the major structural characteristics and properties of silver-containing hybrid systems, we should classify these materials according to their chemical structure.Composites with Silver Nanoparticles (SN) Dispersed in a Polymer Matrix with Hybrid Structure. The major distinguishing feature of such materials is the prior synthesis of the hybrid polymer matrix obtained due to the formation of chemical bonds between the organic and inorganic components with subsequent introduction of SN into the system. The synthesis of the SN may be either in situ or ex situ. 740040-5760/15/5102-0074

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Fluorescent Silver Nanoclusters in Condensed DNA

Cited by 16 publications

References 45 publications

DNA Modified with Metal Nanoparticles: Preparation and Characterization of Ordered Metal-DNA Nanostructures in a Solution and on a Substrate

DNA Modified with Metal Nanoparticles: Preparation and Characterization of Ordered Metal-DNA Nanostructures in a Solution and on a Substrate

Ultrafast coherence transfer in DNA-templated silver nanoclusters

Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles

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