Resolving the stacking fault structure of silver nanoplates

Tan, Taixing; Zhang, Shun; Wang, Jie; Zheng, Yu-Qin; Lai, Haopeng; Li, Jialiang; Qin, Fengqi; Wang, Cheng

doi:10.1039/d0nr06912d

Cited by 33 publications

(54 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chloride could affect Ag nanoplate formation through Ag(I) complexation and oxidative etching (fostered by the reduced standard potential of halogen compounds), but its substoichiometric use in conjunction with an excess of the chelator ethylenediamine the plating bath makes adsorption the most likely cause (due to the low solubility of silver halides, a suitably strong ligand was required to reach chloride concentrations sufficient for shape control) [53] . Silver has an exceptionally low stacking fault energy, which promotes the spontaneous formation of planar defects during crystal growth [202] . This could explain the relative abundance of electroless systems for the deposition of 2D silver crystals such as nanoplates and nanobelts [20,53,81] …”

Section: Nanomaterials Synthesismentioning

confidence: 99%

“…[53] Silver has an exceptionally low stacking fault energy, which promotes the spontaneous formation of planar defects during crystal growth. [202] This could explain the relative abundance of electroless systems for the deposition of 2D silver crystals such as nanoplates and nanobelts. [20,53,81] Often, the evolution of anisotropic deposit features is not fully understood.…”

Section: Shape-controlled Electroless Platingmentioning

confidence: 99%

See 1 more Smart Citation

Electroless Plating of Metal Nanomaterials

Muench

2021

ChemElectroChem

View full text Add to dashboard Cite

Electroless plating is commonly associated with metallizing macroscopic work pieces, but also represents a surprisingly powerful nanomanufacturing tool. This review details the technique's use for creating nanomaterials of arbitrary dimensionality, ranging from nanoparticles over nanotubes, nanowires, and ultrathin films to nanostructured lattices, focusing on the solution chemistry and mechanistic aspects. The synthesis of defined nanostructures serves as overarching perspective, which is enriched by drawing connections to and insights from related fields. Strategies for controlling the size, shape, crystallinity, porosity, composition, and arrangement of electrolessly plated nanostructures are outlined, including templating (which harnesses the method's exceptional conformality to guide and limit deposit formation), the complementary approach of selective growth, tailored seeding, and bath design. Being able to strike convincing compromises between material quality and ease of preparation, electroless nanoplating has a distinct potential to facilitate the application of metal nanomaterials.

show abstract

Section: Nanomaterials Synthesismentioning

confidence: 99%

Section: Shape-controlled Electroless Platingmentioning

confidence: 99%

Electroless Plating of Metal Nanomaterials

Muench

2021

ChemElectroChem

View full text Add to dashboard Cite

show abstract

“…35 Such defects are crucial to the synthesis of Au nanoplates because they provide an otherwise isotropic metal with a symmetry-breaking structure having a two- dimensional character. 38,39 The spiral growth solution is an aqueous mixture of HAuCl 4 , PVP, methanol, and protonated phenyl-modified carbon nitride (pPhCN). The synthesis proceeds via a plasmon-mediated growth mode in which LSPR-generated hot electron−hole pairs drive the reaction.…”

mentioning

confidence: 99%

“…45 Such defects are considered essential to the promotion of a planar growth mode. 38,46 Despite these defects, the overall structure shows a high degree of crystallinity where even multiturn spirals express Moiréfringes (Figure S5).…”

mentioning

confidence: 99%

“…The seeds were fabricated using benchtop processing routes in which either nanoimprint lithography or microsphere photolithography is used to define a periodic array of disc-like structures that, when heated, assemble into near-hemispherical Au nanostructures. − The majority of seeds produced in this manner are [111]-oriented single crystals with planar stacking faults that run parallel to the substrate surface . Such defects are crucial to the synthesis of Au nanoplates because they provide an otherwise isotropic metal with a symmetry-breaking structure having a two-dimensional character. , The spiral growth solution is an aqueous mixture of HAuCl 4 , PVP, methanol, and protonated phenyl-modified carbon nitride (pPhCN). The synthesis proceeds via a plasmon-mediated growth mode in which LSPR-generated hot electron–hole pairs drive the reaction.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Sequential Symmetry-Breaking Events as a Synthetic Pathway for Chiral Gold Nanostructures with Spiral Geometries

et al. 2021

View full text Add to dashboard Cite

Symmetry-breaking synthetic controls allow for nanostructure geometries that are counter to the underlying crystal symmetry of a material. If suitably applied, such controls provide the means to drive an isotropic metal along a growth pathway yielding a three-dimensional chiral geometry. Herein, we present a light-driven solution-based synthesis yielding helical gold spirals from substrate-bound seeds. The devised growth mode relies on three separate symmetry-breaking events ushered in by seeds lined with planar defects, a capping agent that severely frustrates early stage growth, and the Coulombic repulsion that occurs when identically charged growth fronts collide. Together they combine to advance a growth pathway in which planar growth emanates from one side of the seed, advances to encircle the seed from both clockwise and counterclockwise directions, and then, upon collision of the two growth fronts, sees one front rise above the other to realize a self-perpetuating three-dimensional spiral structure.

show abstract

Unconventional hcp/fcc Nickel Heteronanocrystal with Asymmetric Convex Sites Boosts Hydrogen Oxidation

Pan,

Shi,

Liu

et al. 2024

Angewandte Chemie

View full text Add to dashboard Cite

Developing non‐platinum group metal catalysts for the sluggish hydrogen oxidation reaction (HOR) is critical for alkaline fuel cells. To date, Ni‐based materials are the most promising candidates but still suffer from insufficient performance. Herein, we report an unconventional hcp/fcc Ni (u‐hcp/fcc Ni) heteronanocrystal with multiple epitaxial hcp/fcc heterointerfaces and coherent twin boundaries, generating rugged surfaces with plenty of asymmetric convex sites. Systematic analyses discover that such convex sites enable the adsorption of *H in unusual bridge positions with weakened binding energy, circumventing the over‐strong *H adsorption on traditional hollow positions, and simultaneously stabilizing interfacial *H2O. It thus synergistically optimizes the HOR thermodynamic process as well as reduces the kinetic barrier of the rate‐determining Volmer step. Consequently, the developed u‐hcp/fcc Ni exhibits the top‐rank alkaline HOR activity with a mass activity of 40.6 mA mgNi‐1 (6.3 times higher than fcc Ni control) together with superior stability and high CO‐tolerance. These results provide a paradigm for designing high‐performance catalysts by shifting the adsorption state of intermediates through configuring surface sites.

show abstract

Resolving the stacking fault structure of silver nanoplates

Abstract: The stacking fault structure of Ag nanoplates is systematically investigated on the atomic level, providing an insight into the origin of anisotropic growth.

Cited by 33 publications

References 45 publications

Electroless Plating of Metal Nanomaterials

Electroless Plating of Metal Nanomaterials

Sequential Symmetry-Breaking Events as a Synthetic Pathway for Chiral Gold Nanostructures with Spiral Geometries

Unconventional hcp/fcc Nickel Heteronanocrystal with Asymmetric Convex Sites Boosts Hydrogen Oxidation

Contact Info

Product

Resources

About