Oriented attachment mechanism of triangular Ag nanoplates: a molecular dynamics study

Balankura, Tonnam; Yan, Tianyu; Jahanmahin, Omid; Narukatpichai, Jenwarin; Ng, Alan Man Ching; Fichthorn, Kristen A.

doi:10.1039/d0na00124d

Cited by 21 publications

(25 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[31,32] As such, it is most favorable for OA to occur when the fusion of two faces results in the lowest overall energy. The exact pathway for attachment can be affected by a number of factors, including the surfactant [33][34][35] and solvent [36,37] involved in a synthesis, the initial contact angle, [36,38] and the intrinsic properties of the building blocks. [39][40][41][42] After coalescence, the elimination of attachment interface and smoothing of surface can be achieved through self-recrystallization (or self-integration) because of the variation in chemical potential across the surface.…”

Section: General Conceptmentioning

confidence: 99%

“…The attachment typically occurs on those faces with the highest energy or under the least protection by the surfactant. [33][34][35]55] As such, anisotropic growth can be induced and nanostructures with reduced symmetry relative to its crystal lattice are obtained, which is often difficult to accomplish through atomic addition. Moreover, a high abundance of structural defects, such as twin planes and stacking faults, can be introduced into the nanostructures during the attachment process.…”

Section: Attachment Vs Atomic Additionmentioning

confidence: 99%

“…In addition to altering the order of surface energies of different facets, the surfactant and capping agent adsorbed on the surface of particles could act as a physical barrier to enhance the steric hindrance, impeding the particle attachment. [33,76] However, other studies also reported that surface species could promote the particleparticle interaction and thus attachment events through hydrogen bonding or other nonbonding forces. [71,76] Hence, the coverage density and adsorption strength of these species on the particle's surface have a major impact on the kinetics of OA growth.…”

Section: Growth Kineticsmentioning

confidence: 99%

“…For example, using atomistic MD simulations, a recent study probed the mechanism of experimentally-observed preference of lateral attachment of PVP-covered Ag nanoplates. [33] Based on the calculation using the potential of mean force (PMF), the energy barrier for the nanoplates to attach in a face-to-face manner was almost six times higher than that for side-to-side attachment, which could be ascribed to the less protection of side faces by PVP. Owing to the smaller surface area, the number of PVP adsorbed on the side faces of nanoplates was significantly lower than that on the basal planes.…”

Section: Computational Simulationmentioning

confidence: 99%

See 3 more Smart Citations

Oriented Attachment: A Unique Mechanism for the Colloidal Synthesis of Metal Nanostructures

2022

View full text Add to dashboard Cite

Rational synthesis of nanostructures with desired properties critically depends on our understanding of the growth mechanism. In addition to the traditional mechanism involving atomic addition, oriented attachment (OA) has received increasing attention in recent years. Employing nanocrystallites as building blocks, OA offers an important route to anisotropic growth, inclusion of defects, and formation of nanostructures with branched morphology. With a focus on metals, here we offer a brief account of recent progress in understanding OA and how it can be adapted for the colloidal synthesis of nanostructures with diverse compositions and morphologies. We start with a discussion on the current understanding of OA based on computational simulations and experimental studies, followed by typical examples of metal nanostructures produced through OA. Finally, we showcase the catalytic and plasmonic applications enabled by those nanostructures, together with perspectives on the challenges and opportunities.

show abstract

Section: General Conceptmentioning

confidence: 99%

Section: Attachment Vs Atomic Additionmentioning

confidence: 99%

Section: Growth Kineticsmentioning

confidence: 99%

Section: Computational Simulationmentioning

confidence: 99%

See 2 more Smart Citations

Oriented Attachment: A Unique Mechanism for the Colloidal Synthesis of Metal Nanostructures

2022

View full text Add to dashboard Cite

show abstract

“…In 1998, Penn et al proposed an important crystal growth mechanism called "Oriented Attachment (OA)", which is also been referred to as oriented aggregation and epitaxial assembly [44] [45] [46] [47]. The alloy formation mechanism can be explained from the underlying OA process.…”

Section: Oriented Attachmentmentioning

confidence: 99%

Nanostage Alloying of Metals in Liquid Phase

Roy¹,

Pal²

2021

ACES

View full text Add to dashboard Cite

Alloying of metals is known from antiquity. Alloy making i.e., homogenizing metals started in a "hit-or-miss" way. The 1 st alloy from copper (Cu) and tin (Sn) was produced around 2500 BC and from then Bronze Age began. Subsequently iron (Fe) age started after the Bronze Age. Aluminium (Al) alloying was discovered much later because pure Al could not be recovered easily even though Al is the most abundant metal in the earth's crust. Refining of Al is a very difficult job because of its strong affinity towards oxygen. To ease alloying, melting points (mp) of the individual constituents and reactivity of metal towards oxygen were the hurdles. Now understanding the thermodynamics of metal mixing has paved alloying. Periodic properties of elements concerning size, electronegativity, crystal structure, valency, lattice spacing, etc. are considered for alloying. In this feature article, more emphasis is given to Hume-Rothery rules in which the necessary parameters for alloying have been illustrated. Importantly standard electrode potential (E 0 ) values, eutectic, phase diagram, size-related strain in metals, etc. have been looked into in the present discussion. One elegant example is Sn-Pb alloy, known as soft solder. Soft solder was in use for many years to connect metals and in electric circuitry. Low melting, flowability, and conductivity of soft solder had placed Sn-Pb alloy a unique position in industries, laboratories and even in cottage industries. However, toxic Pb volatilizes during soldering and hence soft solder is banned almost in all countries. We felt the need for a viable alternative to obtain soldering material and then silver (Ag) based highly conducting, an eco-friendly alloy of Sn resulted in from a high boiling liquid. The discovery engenders not only a new conducting soldering alloy but also a new concept of melting metals together. Furthermore, new ideas of alloying have been generalized at their nanostages from a suitable high boiling solvent.

show abstract

PVP-capped silver nanoparticles for efficient SERS detection of adenine based on the stabilizing and enrichment roles of PVP

Zhang,

et al. 2023

Microchim Acta

View full text Add to dashboard Cite

Oriented attachment mechanism of triangular Ag nanoplates: a molecular dynamics study

Abstract: Molecular dynamics simulations predict that PVP-capped silver nanoplates exhibit lateral oriented attachment.

Cited by 21 publications

References 47 publications

Oriented Attachment: A Unique Mechanism for the Colloidal Synthesis of Metal Nanostructures

Oriented Attachment: A Unique Mechanism for the Colloidal Synthesis of Metal Nanostructures

Nanostage Alloying of Metals in Liquid Phase

PVP-capped silver nanoparticles for efficient SERS detection of adenine based on the stabilizing and enrichment roles of PVP

Contact Info

Product

Resources

About