Linear Superclusters of Colloidal Gold Particles by Electrostatic Assembly on DNA Templates

Kumar, Ashavani; Pattarkine, Mrunalini V.; Bhadbhade, Mohan M.; Mandale, A.B.; Ganesh, Krishna N.; Datar, Suwarna; Dharmadhikari, C. V.; Sastry, Murali

doi:10.1002/1521-4095(200103)13:5<341::aid-adma341>3.0.co;2-x

Cited by 151 publications

(114 citation statements)

References 15 publications

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“…Later it was shown that an assembly of the Au-nanoparticles is accompanied by formation of planar superstructure consisting of repetitive neighboring linear DNA molecules and Aunanopartices. These results unequivocally show that linear, rigid, ds DNA molecules after interaction with Aunanoparticles form planar superstructures of type (…-Au-DNA-Au-DNA-Au-DNA-Au-…), despite the anisotropic properties of initial ds DNA molecules [4,[26][27][28][29].…”

Section: Resultsmentioning

confidence: 99%

A Dual Effect of Au-Nanoparticles on Nucleic Acid Cholesteric Liquid-Crystalline Particles

Yevdokimov¹,

Skuridin²,

Salyanov³

et al. 2011

JBNB

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Au-nanoparticles (size about 2 nm, but not 5 or 15 nm) are capable of effectively incorporating into quasinematic layers of particles of cholesteric liquid-crystalline dispersion formed by double-stranded nucleic acid molecules of various families (DNA and poly(I)xpoly(C)). This Au-size-dependent process is accompanied by a decrease in amplitudes of abnormal bands in the CD spectra specific to initial cholesteric liquid-crystalline dispersions and simultaneously by an appearance of plasmon resonance band in visible absorption spectrum. The study of properties of particles of cholesteric liquid-crystalline dispersion treated with Au-nanoparticles by means of various physico-chemical methods demonstrates that incorporation of Au-nanoparticles into quasinematic layers of these particles results in two effects: i) it facilitates reorganization of the spatial cholesteric structure of particles, and ii) it induces the formation of Au-clusters in the content of particles. It is not excluded that these effects represent a possible reason for genotoxicity of Au-nanoparticles.

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Section: Resultsmentioning

confidence: 99%

A Dual Effect of Au-Nanoparticles on Nucleic Acid Cholesteric Liquid-Crystalline Particles

Yevdokimov¹,

Skuridin²,

Salyanov³

et al. 2011

JBNB

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“…Nanowires of Au, [3][4][5][6][7][8] Pt [9][10][11][12] and Pd, [13][14][15] binary semiconductors [16][17][18] and conducting polymers [19][20][21] have all been prepared using this method. The advantages of DNA as a template are: (i) it is a chemically robust material which can be obtained in high purity; (ii) single molecules of DNA many micrometres long are available and (iii) DNA composition and structure are well defined.…”

Section: Introductionmentioning

confidence: 99%

Self‐Assembly of DNA‐Templated Polypyrrole Nanowires: Spontaneous Formation of Conductive Nanoropes

Pruneanu¹,

Al-Said²,

Dong³

et al. 2008

Adv Funct Materials

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Polypyrrole nanowires formed by polymerization of pyrrole on a DNA template self‐assemble into rope‐like structures. These ‘nanoropes’ may be quite smooth (diameters 5–30 nm) or may show frayed ends where individual strands are visible. A combination of electric force microscopy, conductive atomic force microscopy and two‐terminal current–voltage measurements show that they are conductive. Nanoropes adhere more weakly to hydrophobic surfaces prepared by silanization of SiO2 than to the clean oxide; this effect can be used to aid the combing of the nanoropes across microelectrode devices for electrical characterization.

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“…This effect is unique as none of the other chemical or biological compounds can cause the nematization (complete unwinding) of the spatial structure of CLCD particles as a result of their interaction with DNA molecules at the room temperature. Obtained results demonstrate unambiguously that ds DNA molecules, after they are doped with nano-Au, are collinearly arranged in order to form planar suprastructures [36][37][38][39] despite the fact that DNA molecules possess chiral and anisotropic properties.…”

Section: Changes In CD Spectra Caused By the Doping Of Dna Clcd Partimentioning

confidence: 99%

The Physicochemical and Nanotechnological Approaches to Creation of “Rigid” DNA Nanoconstructions

Yevdokimov¹,

Salyanov²,

Штыкова³

et al. 2014

TONANOJ

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Abstract:Two different approaches to the creation of "rigid" (gel-like) DNA particles (or DNA nanoconstructions) are considered. The physicochemical approach is based on the formation of nanobridges between double-stranded DNA molecules ordered in quasinematic layers of cholesteric liquid-crystalline dispersion (CLCD) particles or their salting-out. This approach represents by itself a "chemical gelation" of DNA molecules realized inside the nanometric DNA particles. The formed "rigid" DNA particles have unique physicochemical properties. The nanotechnological approach is based on induction of "physical gelation" as a result of the formation of Au-clusters in the "free" space between double-stranded DNA molecules ordered in CLCD particles. This approach results in the formation of a new "rigid" DNA material. Its distinctive peculiarity, in contrast to the chemically bonded "rigid" DNA particles, consists in a very weak binding affinity to the nuclear membrane filter used for atomic force microscopy. This opens up a possibility for easy manipulations with CLCD particles doped with gold nanoparticles.Keywords: DNA liquid-crystalline dispersions, nanoconstructions of DNA, nanotechnology of nucleic acids, structure of DNA liquid crystals.

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Linear Superclusters of Colloidal Gold Particles by Electrostatic Assembly on DNA Templates

Cited by 151 publications

References 15 publications

A Dual Effect of Au-Nanoparticles on Nucleic Acid Cholesteric Liquid-Crystalline Particles

A Dual Effect of Au-Nanoparticles on Nucleic Acid Cholesteric Liquid-Crystalline Particles

Self‐Assembly of DNA‐Templated Polypyrrole Nanowires: Spontaneous Formation of Conductive Nanoropes

The Physicochemical and Nanotechnological Approaches to Creation of “Rigid” DNA Nanoconstructions

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