Shape control in silver metal nanoparticle construction using dumb-bell dendrimers

Vassilieff, Tatiana; Sutton, Amy; Kakkar, Ashok

doi:10.1039/b810318f

Cited by 17 publications

(8 citation statements)

References 43 publications

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“…In particular, nanoparticles exhibit unique size-dependent optical and electronic properties because of their size; thus, practical uses in many fields have been proposed and demonstrated [1][2][3][4][5][6]. In addition, many researchers have proposed preparation methods for size-and shape-controlled nanoparticles [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Preparation of silver nanoparticles using the SPG membrane emulsification technique

Kakazu

Murakami

Akamatsu

et al. 2010

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 99%

Preparation of silver nanoparticles using the SPG membrane emulsification technique

Kakazu

Murakami

Akamatsu

et al. 2010

Journal of Membrane Science

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“…Dendrimers possess several important features which make them attractive in this regard 3, 6, 7. Chemical composition of these hyperbranched and monodisperse macromolecules can be predetermined, and their size and architecture as well as the surface functionality can be controlled in a desired manner for a particular application 6–9. It has been demonstrated that dendrimers can be used to synthesize silver and gold nanoparticles, and it has also been postulated that the terminal peripheral groups of the dendrimers are primarily responsible for particle stabilization 3…”

Section: Introductionmentioning

confidence: 99%

Silver metal nanoparticles: Facile dendrimer‐assisted size‐controlled synthesis and selective catalytic reduction of chloronitrobenzenes

Sutton

Franc

Kakkar

2009

J. Polym. Sci. A Polym. Chem.

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A simple and versatile synthetic methodology to silver metal nanoparticles that utilizes 3,5-dihydroxybenzyl alcohol-based dendrimers as templates and does not necessitate the addition of any external reducing agent is reported. An evaluation of the role of addition rate of the silver acetate solution, and the dendrimer to silver acetate molar ratio, as well as the dendritic effect on nanoparticle growth, suggests that the size of these metal nanoparticles can be controlled by simple variations of these parameters. A probe of the mechanism of the nanoparticle formation and growth indicates that the terminal hydroxyl groups of the dendrimers play a major role in metal ion isolation and reduction, in addition to providing stabilization to the growing metal particles. These silver metal nanoparticles are highly active catalysts for the selective reduction of chloronitrobenzenes to chloroanilines.Substrates: Ortho-, para-chloronitrobenzene and dichloro-dinitrobenzene % Conversion and Selectivity 100Catalyst: Generations 1-3 dendrimer-templated silver nanoparticles Substrates: Ortho-, para-chloronitrobenzene and dichloro-dinitrobenzene % Conversion and Selectivity 100 Recycled Catalyst: Generations 1-3 dendrimer-templated silver nanoparticles recycled from above 4490 SUTTON, FRANC, AND KAKKAR

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“…Di-carboxylates and tri-carboxylates with two nearest carboxylate groups separated by two or three carbon atoms, such as sodium citrate, oxalate, succinate and malnate, have shown to cap the {1 1 1} facets, causing their stacking into nanoplates [25]. Nanocubes have also been synthesized using structural regular polymers with defined intra/inter-molecular spacings, such as 2-butyn-1,4-diol dendrimers with 3,5-dihydroxybenzyl alcohol branches [22].…”

Section: Introductionmentioning

confidence: 99%

Silver nanoparticle synthesis using lignin as reducing and capping agents: A kinetic and mechanistic study

Hsieh

2016

International Journal of Biological Macromolecules

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a b s t r a c tSilver nanoparticles (AgNPs) were robustly synthesized from aqueous AgNO 3 with alkali lignin (low sulfonate) (AL ls ) severing as dual reducing and capping agent. The AgNP synthesis mechanisms were highly pH dependent. Under neutral and acidic conditions, polydispersed AgNPs were synthesized via the self-catalyzed reduction of Ag + on instantaneously formed Ag 2 O surfaces followed by the slower pseudo-first order reduction. The Ag 2 O nanoparticles functioned as the nucleating sites for the reduction of remaining silver cations to form AgNPs whose size and size distribution strongly dependent of lignin concentrations. AgNPs were optimally synthesized by reducing 2 mmol/L AgNO 3 with 0.16 wt% AL ls at pH 10 and 85• C in 30 min to near 100% yield in bimodal distributed sizes with 23% and 77% in feret diameters of 7.3 (±2.2) nm and 14.3 (±1.8) nm, respectively.

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Shape control in silver metal nanoparticle construction using dumb-bell dendrimers

Abstract: Dendrimers that combine reactive hydroxyl peripheral sites and a stabilizing internal backbone environment influence the evolving morphology of silver metal nanoparticles. As the generation number increases, metal particles with a dominant cube shape are formed.

Cited by 17 publications

References 43 publications

Preparation of silver nanoparticles using the SPG membrane emulsification technique

Preparation of silver nanoparticles using the SPG membrane emulsification technique

Silver metal nanoparticles: Facile dendrimer‐assisted size‐controlled synthesis and selective catalytic reduction of chloronitrobenzenes

Silver nanoparticle synthesis using lignin as reducing and capping agents: A kinetic and mechanistic study

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