Maneuvering the growth of silver nanoplates: use of halide ions to promote vertical growth

Kim, Mun Ho; Kwak, Su Kyoung; Im, Sang Hyuk; Lee, Jong Bae; Choi, Kil‐Yeong; Byun, Doo Jin

doi:10.1039/c4tc00899e

Cited by 51 publications

(36 citation statements)

References 67 publications

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“…However, based on their fcc crystal structure, the fact that the basal planes of microplates consist of two {111} surfaces, and the need to minimize surface energy with low-index planes, most researchers inferred that the sides of nanoplates/microplates consist of 12 alternating {100} and {111} side planes (Table S1). ,, Models in Figure c,d show that the number of twin planes in the structure affects the arrangement of {111} and {100} facets on the sides of microplates. When the number of twin layers is even, the side facets alternate vertically and laterally between {111} and {100} in a checkerboard pattern (Figure c).…”

Section: Results and Discussionmentioning

confidence: 99%

Isotropic Iodide Adsorption Causes Anisotropic Growth of Copper Microplates

et al. 2020

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Control over the shape of a metal nanostructure grants control over its properties, but the processes that cause solution-phase anisotropic growth of metal nanostructures are not fully understood. This article shows why the addition of a small amount (75–100 μM) of iodide ions to a Cu nanowire synthesis results in the formation of Cu microplates. Microplates are 100 nm thick and micronwide crystals that are thought to grow through atomic addition to {100} facets on their sides instead of the {111} facets on their top and bottom surfaces. Single-crystal electrochemical measurements show that the addition of iodide ions decreased the rate of Cu addition to Cu(111) by 8.2 times due to the replacement of adsorbed chloride by iodide. At the same time, the addition of iodide ions increased the rate of Cu addition to Cu(100) by 4.0 times due to the replacement of a hexadecylamine (HDA) self-assembled monolayer with the adsorbed iodide. The activation of {100} facets and passivation of {111} facets with increasing iodide ion concentration correlated with an increasing yield of microplates. Ab initio thermodynamics calculations show that, under the experimental conditions, a minority of iodide ions replaces an overwhelming majority of chloride and HDA on both Cu(100) and Cu(111). While Cu nanowire formation is predicted (and observed) in solutions containing chloride and HDA, the calculations indicate that a strong thermodynamic driving force occurs for {111} facet (and microplate) growth when a small amount of iodide is present, consistent with the experiment.

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Section: Results and Discussionmentioning

confidence: 99%

Isotropic Iodide Adsorption Causes Anisotropic Growth of Copper Microplates

et al. 2020

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“…(a) Growth promotion in the {100} direction of Ag nanoplates leading to selective vertical growth in the presence of I – ions, with the resulting morphology dependent upon the time of addition of the I – species. Reproduced with permission from ref ( 173 ). Copyright 2014 Royal Society of Chemistry.…”

Section: Metal Nanocrystalsmentioning

confidence: 99%

The Many “Facets” of Halide Ions in the Chemistry of Colloidal Inorganic Nanocrystals

2018

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Over the years, scientists have identified various synthetic “handles” while developing wet chemical protocols for achieving a high level of shape and compositional complexity in colloidal nanomaterials. Halide ions have emerged as one such handle which serve as important surface active species that regulate nanocrystal (NC) growth and concomitant physicochemical properties. Halide ions affect the NC growth kinetics through several means, including selective binding on crystal facets, complexation with the precursors, and oxidative etching. On the other hand, their presence on the surfaces of semiconducting NCs stimulates interesting changes in the intrinsic electronic structure and interparticle communication in the NC solids eventually assembled from them. Then again, halide ions also induce optoelectronic tunability in NCs where they form part of the core, through sheer composition variation. In this review, we describe these roles of halide ions in the growth of nanostructures and the physical changes introduced by them and thereafter demonstrate the commonality of these effects across different classes of nanomaterials.

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“…S4, ESI †) which is over 100-fold larger than that in previous reports. [22][23][24] The as-prepared monodispersed SNP type I sized from tens to a few hundred nanometers with single LSPR bands ranging from visible to near-infrared range is no doubt a critical building block meeting the requirement of various rapidly developing elds including nanoantenna, 42,43 true color nanoink printing, 44 optical processing, [45][46][47] electronic packaging 18 and circuit fabrication. 39…”

Section: Resultsmentioning

confidence: 99%

Synthesis of silver nanoplate based two-dimension plasmonic platform from 25 nm to 40 μm: growth mechanism and optical characteristic investigationin situ

et al. 2017

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Maneuvering the growth of silver nanoplates: use of halide ions to promote vertical growth

Abstract: The addition of iodide ions promoted the vertical growth of nanoplate structures in a well-defined kinetically controlled synthetic route, resulting in small thick nanoplates.

Cited by 51 publications

References 67 publications

Isotropic Iodide Adsorption Causes Anisotropic Growth of Copper Microplates

Isotropic Iodide Adsorption Causes Anisotropic Growth of Copper Microplates

The Many “Facets” of Halide Ions in the Chemistry of Colloidal Inorganic Nanocrystals

Synthesis of silver nanoplate based two-dimension plasmonic platform from 25 nm to 40 μm: growth mechanism and optical characteristic investigationin situ

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