Successive Deposition of Silver on Silver Nanoplates: Lateral versus Vertical Growth

Zeng, Jie; Xia, Xiaohu; Rycenga, Matthew; Henneghan, Patrick; Li, Qingge; Xia, Younan

doi:10.1002/anie.201005549

Cited by 213 publications

(157 citation statements)

References 46 publications

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“…[ 60 ] In the solution-phase synthesis of nanocrystals, however, a facet-specifi c capping agent is often intentionally introduced into the reaction system to promote the formation of desired facets. [63][64][65][66][67][68] As such, the surface of a nanocrystal is often covered by the capping agent. The adsorption of a capping agent can alter the surface free energies of various facets and even reverse their order.…”

Section: Facet Selectivitymentioning

confidence: 99%

25th Anniversary Article: Galvanic Replacement: A Simple and Versatile Route to Hollow Nanostructures with Tunable and Well‐Controlled Properties

et al. 2013

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This article provides a progress report on the use of galvanic replacement for generating complex hollow nanostructures with tunable and well-controlled properties. We begin with a brief account of the mechanistic understanding of galvanic replacement, specifically focused on its ability to engineer the properties of metal nanostructures in terms of size, composition, structure, shape, and morphology. We then discuss a number of important concepts involved in galvanic replacement, including the facet selectivity involved in the dissolution and deposition of metals, the impacts of alloying and dealloying on the structure and morphology of the final products, and methods for promoting or preventing a galvanic replacement reaction. We also illustrate how the capability of galvanic replacement can be enhanced to fabricate nanomaterials with complex structures and/or compositions by coupling with other processes such as co-reduction and the Kirkendall effect. Finally, we highlight the use of such novel metal nanostructures fabricated via galvanic replacement for applications ranging from catalysis to plasmonics and biomedical research, and conclude with remarks on prospective future directions.

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Section: Facet Selectivitymentioning

confidence: 99%

25th Anniversary Article: Galvanic Replacement: A Simple and Versatile Route to Hollow Nanostructures with Tunable and Well‐Controlled Properties

et al. 2013

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“…1 In the last couple of years, much development has been done with respect to the synthesis of metal nanoparticles and some understanding of how to prepare different shapes and sizes has been achieved. 2 Blending such nanoparticles in polymeric, ceramic matrices allowed fabrication of new materials with unprecedented properties which might find their way in optical, electrical, and magnetic applications. Materials with high dielectric permittivity (e9) are of great interest for future electronic capacitors with high energy storage densities and low operating voltage.…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of silver nanoparticles coated with silica shells of different thicknesses

et al. 2013

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a Core/shell nanoparticles having metallic silver nanoparticle cores of y38 nm in diameter and silica shells of different thicknesses ranging from y3.6-20 nm were prepared. For the silica coating, a slightly modified Stöber method was used which allowed preparing grams of core/shell nanoparticles for the first time. The particles were characterized by UV-vis spectroscopy, dynamic light scattering, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray scattering. Their dielectric properties were measured as pellets in parallel-plate capacitors. It was found that the permittivity is much influenced by the silica shell thickness with an increase in permittivity for thinner shells. A shell thickness of 20 ¡ 2 nm allowed fabrication of capacitors which have similar characteristics to those of silica, thus, there is no influence of the metal core on the dielectric properties anymore. However, by decreasing the silica shell to 17 ¡ 2, 8 ¡ 1.5, and 6.6 ¡ 1.5 nm the permittivity at high frequencies is increasing from 10, 34, to 41, respectively. The insulator to metal transition was observed for a silica shell thickness of 3.6 ¡ 1 nm.Functionalization of the silica surface with a hydrophobic coating removes surface adsorbed water as observed by the flat dielectric permittivity over a large frequency domain.

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“…With high concentrations of stabilizer, however, the selectivity of adsorption of PVP on the surface of the silver crystal disappears. An analogous effect was later used in the controlled growth of silver nanostructures [24,87]. During the growth of the silver nanocrystals, depending on the structure of the stabilizer, the stages of thermodynamic (adsorption) and kinetic control of the growth alternate, and this changes the ratio of the areas of the {111} and {100} planes of the crystal and regulates its growth accordingly.…”

Section: Poly(n-vinyl-2-pyrrolidone)mentioning

confidence: 96%

Features of the stabilization of silver nanoparticles by carbonyl-containing polymers

Tolstov

Lebedev

2012

Theor Exp Chem

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Recent advances in the investigation of the reaction of silver nanoparticles and stabilizers of the polymer type with carbonyl-containing functional groups are examined. Data on the characteristics of the investigated polymer-silver nanoparticle nanosystems and the effect of the structure of the polymer on the form and size of the nanoparticles are summarized. The mechanism of stabilization is presented for each type of polymer.

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Successive Deposition of Silver on Silver Nanoplates: Lateral versus Vertical Growth

Cited by 213 publications

References 46 publications

25th Anniversary Article: Galvanic Replacement: A Simple and Versatile Route to Hollow Nanostructures with Tunable and Well‐Controlled Properties

25th Anniversary Article: Galvanic Replacement: A Simple and Versatile Route to Hollow Nanostructures with Tunable and Well‐Controlled Properties

Dielectric properties of silver nanoparticles coated with silica shells of different thicknesses

Features of the stabilization of silver nanoparticles by carbonyl-containing polymers

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