Silver Nanocrystals with Concave Surfaces and Their Optical and Surface‐Enhanced Raman Scattering Properties

Xia, Xiaohu; Zeng, Jie; McDearmon, Brenden; Zheng, Yiqun; Li, Qingge; Xia, Younan

doi:10.1002/ange.201105200

Cited by 61 publications

(51 citation statements)

References 27 publications

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“…In the growth solution, hexadecyltrimethylammonium bromide (CTAB) and gold (III) chloride trihydrate (HAuCl 4 ) were mixed to create the AuBr 4 -complex, and this complex was reduced to Au + by adding ascorbic acid (AA). To this typical growth solution, different kinds of benzenethiol molecules were added as shape modifiers.…”

Section: Effect Of Benzenethiol As a Nanoparticle Shape Modifier And mentioning

confidence: 99%

Concave Rhombic Dodecahedral Au Nanocatalyst with Multiple High-Index Facets for CO₂ Reduction

Lee¹,

Yang²,

Yoon³

et al. 2015

ACS Nano

252

194

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A concave rhombic dodecahedron (RD) gold nanoparticle was synthesized by adding 4-aminothiophenol (4-ATP) during growth from seeds. This shape is enclosed by stabilized facets of various high-indexes, such as (331), (221), and (553). Because it is driven thermodynamically and stabilized by 4-ATP ligands, the concave RD maintains its structure over a few months, even after rigorous electrochemical reactions. We discussed the mechanism of the shape evolution controlled by 4-ATP and found that both the binding energy of Au-S and the aromatic geometry of 4-ATP are major determinants of Au atom deposition during growth. As a possible application, we demonstrated that the concave RD exhibits superior electrocatalytic performance for the selective conversion of CO2 to CO in aqueous solution.

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Section: Effect Of Benzenethiol As a Nanoparticle Shape Modifier And mentioning

confidence: 99%

Concave Rhombic Dodecahedral Au Nanocatalyst with Multiple High-Index Facets for CO₂ Reduction

Lee¹,

Yang²,

Yoon³

et al. 2015

ACS Nano

252

194

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“…Later, the competition between the growth of different crystal facets was also reported in the synthesis of concave Ag NCs such as octahedron, cube, octapod and trisoctahedron (Fig. 2b) [44]. In addition, some metal NCs with high-index facets and unconventional shapes [5] can be also generated by sophisticated control.…”

Section: Anisotropic Growthmentioning

confidence: 77%

Understanding of the major reactions in solution synthesis of functional nanomaterials

Wang

2016

Sci. China Mater.

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This review covers the major reactions involved in the solution synthesis of nanomaterials. It was designed to classify the traditional strategies such as precipitation, reduction, seed growth, etching, and so on into two basic processes which are termed as bottom-up and top-down routines. The discussion is focused on the basic mechanism and principles during the nucleation and growth of nanocrystals, especially in the solution system. This review also presents a prediction for how to utilize these intrinsic processes to artificially construct the desired specific and functional nanostructures. We try to describe the most directive and effective way to control the structures of nanocrystals for researchers who can master the major reaction mechanism and grasp the basic technologies in synthetic nanoscience.

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“…Notable examples include structures composed of Ag, Au, Pd, Pt, Rh, or Cu and enclosed by low-index facets, such as cubes, octahedra, cuboctahedra, tetrahedra, decahedra, icosahedra, rectangular bars, and pentagonal rods or wires. Additionally, nanocrystals covered by high-index facets, including concave cubes or octahedra, octapods, trisoctahedra, tetrahexahedra, and hexoctahedra, have also been prepared with great uniformity (12,(27)(28)(29)(30)(31)(32)(33).…”

Section: Shape-controlled Synthesis Of Metal Nanocrystalsmentioning

confidence: 99%

Shape-Controlled Metal Nanocrystals for Heterogeneous Catalysis

Ruditskiy

Peng

Xia

2016

Annu. Rev. Chem. Biomol. Eng.

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101

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The ability to control the shape of metal nanocrystals allows us to not only maneuver their physicochemical properties but also optimize their activity in a variety of applications. Heterogeneous catalysis, in particular, would benefit tremendously from the availability of metal nanocrystals with controlled shapes and well-defined facets or surface structures. The immediate benefits may include significant enhancements in catalytic activity and/or selectivity along with reductions in the materials cost. We provide a brief account of recent progress in the development of metal nanocrystals with controlled shapes and thereby enhanced catalytic performance for several reactions, including formic acid oxidation, oxygen reduction, and hydrogenation. In addition to monometallic nanocrystals, we also cover a bimetallic system, in which the two metals are formulated as alloyed, core-shell, or core-frame structures. We hope this article will provide further impetus for the development of next-generation heterogeneous catalysts essential to a broad range of applications.

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Silver Nanocrystals with Concave Surfaces and Their Optical and Surface‐Enhanced Raman Scattering Properties

Abstract: Silber‐Nanokristalle mit konkaven, hoch indizierten Oberflächen wurden durch Kontrolle des Habitus kubischer Ag‐Kristallkeime auf einfache Weise hergestellt. Vier Arten konkaver Nanokristalle wurden erhalten: Oktaeder, Würfel, Oktapoden und Trisoktaeder (siehe Bild).

Cited by 61 publications

References 27 publications

Concave Rhombic Dodecahedral Au Nanocatalyst with Multiple High-Index Facets for CO₂ Reduction

Concave Rhombic Dodecahedral Au Nanocatalyst with Multiple High-Index Facets for CO₂ Reduction

Understanding of the major reactions in solution synthesis of functional nanomaterials

Shape-Controlled Metal Nanocrystals for Heterogeneous Catalysis

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Silver Nanocrystals with Concave Surfaces and Their Optical and Surface‐Enhanced Raman Scattering Properties

Abstract: Silber‐Nanokristalle mit konkaven, hoch indizierten Oberflächen wurden durch Kontrolle des Habitus kubischer Ag‐Kristallkeime auf einfache Weise hergestellt. Vier Arten konkaver Nanokristalle wurden erhalten: Oktaeder, Würfel, Oktapoden und Trisoktaeder (siehe Bild).

Cited by 61 publications

References 27 publications

Concave Rhombic Dodecahedral Au Nanocatalyst with Multiple High-Index Facets for CO2 Reduction

Concave Rhombic Dodecahedral Au Nanocatalyst with Multiple High-Index Facets for CO2 Reduction

Understanding of the major reactions in solution synthesis of functional nanomaterials

Shape-Controlled Metal Nanocrystals for Heterogeneous Catalysis

Contact Info

Product

Resources

About

Concave Rhombic Dodecahedral Au Nanocatalyst with Multiple High-Index Facets for CO₂ Reduction

Concave Rhombic Dodecahedral Au Nanocatalyst with Multiple High-Index Facets for CO₂ Reduction