Highly repeatable kinetically-independent synthesis of one- and two-dimensional silver nanostructures by oriented attachment

Marzbanrad, A. Ehsan; Rivers, Geoffrey; Rogalsky, Allan; Lee‐Sullivan, Pearl; Zhao, Boxin; Zhou, Norman Y.

doi:10.1039/c6ra08031f

Cited by 8 publications

(4 citation statements)

References 50 publications

(68 reference statements)

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“…During the reduction process, Ag + can be complexed with PMAA first instead of being reduced by VC 53 because normally VC cannot easily reduce Ag + at room temperature unless external heat 54 or other metastable silver ions (e.g., ammonium silver complex) 55 are supplied. Since there is no electron transfer that occurs during the formation of the PMAA-Ag complex, while the redox reaction with electron transfer will happen only after the redox potential reaching the threshold, 56 ion exchange would take precedence over the redox reaction to form the PMAA-Ag complex in the mixed solution. This reduction process is illustrated in Figure 6a.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Synthesis of Free-Standing Silver Foam via Oriented and Additive Nanojoining

Wang

Guo

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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Silver foams with high porosity and electrical conductivity have many potential applications in energy storage, catalysis, and fuel cells. However, its application is largely hindered by the low efficiency of complicated synthesis processes. In this work, a facile and rapid bottom-up fabrication of silver foams in an aqueous solution allowing large-scale production through oriented and additive nanojoining of silver nanoplate building blocks is reported. Self-assembling of as-grown silver nanoplates facilitates the oriented nanoscale joining to align the atomic lattice, and the local additive of silver promotes diffusion and interconnection at room temperature to realize a rapid synthesis process. The freeze-dried silver foam exhibits a porosity of 95.45%, an ultralow density of 61 mg·cm–3, low thermal conductivity of 0.29 W·m–1·K–1, and high electrical conductivity of 8086 S·m–1. This oriented and locally additive nanojoining process presents a new strategy to fabricate silver foams that may also inspire the fabrications of other metal foams.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Synthesis of Free-Standing Silver Foam via Oriented and Additive Nanojoining

Wang

Guo

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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“…74 In particular, recent studies showed that shape-anisotropic van der Waals interactions play an important role in the growth of 1D and 2D structures via OA. [75][76][77][78][79] Other examples of OA driven by macroscopic interactions include particle-based growth of CdTe nanowires, which is thought to be driven by macroscopic dipole-dipole interparticle interactions. 80 We note that although ligands were used in that work as surface stabilizing agents for CdTe nanoparticles they were not considered to contribute to facet selectivity and alignment and their controlled removal was a necessary step for oriented attachment.…”

Section: Discussionmentioning

confidence: 99%

The origin of facet selectivity and alignment in anatase TiO₂nanoparticles in electrolyte solutions: implications for oriented attachment in metal oxides

Sushko

Rosso

2016

Nanoscale

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Oriented attachment (OA) is an important nonclassical pathway for crystal growth from solution, occurring by the self-assembly of nanoparticles and often leading to highly organized three-dimensional crystal morphologies. The forces that drive nanocrystal reorientation for face-selective attachment and exclude improperly aligned particles have remained unknown. Here we report evidence at the microscopic level that ion correlation forces arising from dynamically interacting electrical double layers are responsible for face-selective attraction and particle rotation into lattice co-alignment as particles interact at long range. Atomic-to-mesoscale simulations developed and performed for the archetype OA system of anatase TiO nanoparticles in aqueous HCl solutions show that face-selective attraction from ion correlation forces outcompetes electrostatic repulsion at several nanometers apart, drawing particle face pairs into a metastable solvent-separated captured state. The analysis of the facet and pH dependence of interparticle interactions is in quantitative agreement with the observed decreasing frequency of attachment between the (112), (001), and (101) face pairs, revealing an adhesion barrier that is largely due to steric hydration forces from structured intervening solvents. This finding helps open new avenues for controlling crystal growth pathways leading to highly ordered three-dimensional nanomaterials.

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“…The term 'oriented attachment' has been used in recent years to describe the growth mechanism of various anisotropic nanostructures, particularly one dimensional (1D) nanorods/nanowires and two dimensional (2D) nanosheets. [26][27][28][29] The growth kinetics was reported to be extremely sensitive to chemical environments around the nanocrystals which typically include the surfactants present, solvent molecules and ions on the surface. 26 Among these, the surfactants play a crucial role since their specific absorption on certain facets of the crystalline nanoparticle not only leads to generation of anisotropic electrostatic dipolar interactions, but also creates steric hindrancethereby strongly affecting the growth rate and the corresponding energy barrier.…”

Section: Crystengcomm Papermentioning

confidence: 99%

The effect of short chain thiol ligand additives on chemical bath deposition of lead sulphide thin films: the unique behaviour of 1,2-ethanedithiol

et al. 2016

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Chemical bath deposition is an effective method for depositing semiconductor thin films with a wide range of compositions and microstructures. While it is widely accepted that organic additive molecules can play a very important role in chemical bath deposition, their role has not been systematically studied. In the present work, we have comparatively studied the effect of four common water-soluble molecules, 1,2ethanedithiol, mercaptopropionic acid, cysteamine and mercaptoethanol, on the chemical bath deposition of lead sulfide. The effect of 1,2-ethanedithiol was shown to be markedly different, resulting in a significantly increased film thickness. We show the effect of each additive on the growth rate, microstructure and optical properties, and provide insights on their mechanism of operation.

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Highly repeatable kinetically-independent synthesis of one- and two-dimensional silver nanostructures by oriented attachment

Abstract: A repeatable and fast synthesis of one- and two-dimensional silver nanostructures with thickness of 20–25 nm, constructed from highly stable hexagonal and triangular nanoplates has been achieved.

Cited by 8 publications

References 50 publications

Synthesis of Free-Standing Silver Foam via Oriented and Additive Nanojoining

Synthesis of Free-Standing Silver Foam via Oriented and Additive Nanojoining

The origin of facet selectivity and alignment in anatase TiO₂nanoparticles in electrolyte solutions: implications for oriented attachment in metal oxides

The effect of short chain thiol ligand additives on chemical bath deposition of lead sulphide thin films: the unique behaviour of 1,2-ethanedithiol

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Highly repeatable kinetically-independent synthesis of one- and two-dimensional silver nanostructures by oriented attachment

Abstract: A repeatable and fast synthesis of one- and two-dimensional silver nanostructures with thickness of 20–25 nm, constructed from highly stable hexagonal and triangular nanoplates has been achieved.

Cited by 8 publications

References 50 publications

Synthesis of Free-Standing Silver Foam via Oriented and Additive Nanojoining

Synthesis of Free-Standing Silver Foam via Oriented and Additive Nanojoining

The origin of facet selectivity and alignment in anatase TiO2nanoparticles in electrolyte solutions: implications for oriented attachment in metal oxides

The effect of short chain thiol ligand additives on chemical bath deposition of lead sulphide thin films: the unique behaviour of 1,2-ethanedithiol

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The origin of facet selectivity and alignment in anatase TiO₂nanoparticles in electrolyte solutions: implications for oriented attachment in metal oxides