A Possible Oriented Attachment Growth Mechanism for Silver Nanowire Formation

Murph, Simona E. Hunyadi; Murphy, Catherine J.; Leach, Austin M.; Gall, Kenneth

doi:10.1021/acs.cgd.5b00123

Cited by 60 publications

(40 citation statements)

References 64 publications

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“…The NWs are smooth and no NPs are observed, as confirmed by LSV (Fig. 40,41 However, this electrochemical method is unique in readily allowing the purity of the Ag NWs in the final product to be checked. Fig.…”

Section: Page 3 Of 6 Analystmentioning

confidence: 73%

Electrochemical monitoring of colloidal silver nanowires in aqueous samples

Kim

2015

Analyst

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Silver nanowires (NWs) are increasingly utilized in technological materials and consumer products, but an effective analytical technique is not yet available to measure their concentration in the environment. Here, we present an electrochemical method to quantify Ag NWs suspended in aqueous solution. Using linear sweep voltammetry, the Ag NWs are identified by the peak potential while their concentration is revealed by the intensity of the peak current. The peak current varies linearly with the Ag NW concentration with a low detection limit of 3.50 ng mL(-1). This method is also successfully applied to quantify Ag NWs in mixtures with nanoparticles, through their specific oxidation behavior, and in wastewater obtained after the Ag NW film preparation process.

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Section: Page 3 Of 6 Analystmentioning

confidence: 73%

Electrochemical monitoring of colloidal silver nanowires in aqueous samples

Kim

2015

Analyst

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“…Other noble metals can also be prepared by this procedure, including Ag, Pt, and Pd. 18 A distinct advantage of this procedure is that the reaction procedure can be done in air or water, and, in principle, is amenable to scaling up. Using commercial nanomaterials and/or scalable-wet chemical procedures is ideal for large-scale treatment applications or biological applications because these materials are readily available and more economical than custom synthesized materials and procedures.…”

Section: Discussionmentioning

confidence: 99%

Multifunctional Hybrid Fe<sub>2</sub>O<sub>3</sub>-Au Nanoparticles for Efficient Plasmonic Heating

Murph¹,

Larsen²,

Lascola³

2016

JoVE

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One of the most widely used methods for manufacturing colloidal gold nanospherical particles involves the reduction of chloroauric acid (HAuCl 4 ) to neutral gold Au(0) by reducing agents, such as sodium citrate or sodium borohydride. The extension of this method to decorate iron oxide or similar nanoparticles with gold nanoparticles to create multifunctional hybrid Fe 2 O 3 -Au nanoparticles is straightforward. This approach yields fairly good control over Au nanoparticle dimensions and loading onto Fe 2 O 3 . Additionally, the Au metal size, shape, and loading can easily be tuned by changing experimental parameters (e.g., reactant concentrations, reducing agents, surfactants, etc.). An advantage of this procedure is that the reaction can be done in air or water, and, in principle, is amenable to scaling up. The use of such optically tunable Fe 2 O 3 -Au nanoparticles for hyperthermia studies is an attractive option as it capitalizes on plasmonic heating of gold nanoparticles tuned to absorb light strongly in the VIS-NIR region. In addition to its plasmonic effects, nanoscale Au provides a unique surface for interesting chemistries and catalysis. The Fe 2 O 3 material provides additional functionality due to its magnetic property. For example, an external magnetic field could be used to collect and recycle the hybrid Fe 2 O 3 -Au nanoparticles after a catalytic experiment, or alternatively, the magnetic Fe 2 O 3 can be used for hyperthermia studies through magnetic heat induction. The photothermal experiment described in this report measures bulk temperature change and nanoparticle solution mass loss as functions of time using infrared thermocouples and a balance, respectively. The ease of sample preparation and the use of readily available equipment are distinct advantages of this technique. A caveat is that these photothermal measurements assess the bulk solution temperature and not the surface of the nanoparticle where the heat is transduced and the temperature is likely to be higher.

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“…They explained that the seeds are produced by the reduction of Ag ions in boiling water, with sodium hydroxide and sodium citrate as additives, and subsequently AgNWs are 15 Journal of Nanomaterials produced. They performed molecular dynamic computations with an embedded atom method to compare with the experimental results [148]. Wu et al developed a growth model based on their observation of coarsening and combination of Ag nanorods by syringe rate testing [93].…”

Section: Reaction Mechanism Of Agnw Polyol Synthesismentioning

confidence: 99%

Polyol Silver Nanowire Synthesis and the Outlook for a Green Process

Hemmati

Harris

Barkey

2020

Journal of Nanomaterials

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Silver nanowires (AgNWs) have a broad range of applications including nanoelectronics, energy conversion, health care, solar cells, touch screens, sensors and biosensors, wearable electronics, and drug delivery systems. As their characteristics depend strongly on their size and morphology, it is essential to find the optimal and most cost-effective synthesis method with precise control over the size and morphology of the wires. Various methods for AgNW synthesis have been reported along with process optimization and novel techniques to increase the yield and aspect ratios of synthesized AgNWs. The most promising processes for synthesis of AgNWs are wet chemical techniques, in which the polyol process is low cost and simple and provides high yield compared to other chemical methods. Reaction mechanism is one of the most important factors in strategies to control the process. Our purpose here is to provide an overview on the main findings regarding synthesis, preparation, and characterization of AgNWs. Recent efforts in the polyol synthesis of AgNWs are summarized with respect to product morphology and size, reaction conditions, and characterization techniques. The effect of essential factors such as reagent concentration and preparation, temperature, and reaction atmosphere that control the size, morphology, and yield of synthesized AgNWs is reviewed. Moreover, a review on the novel modified polyol process and reactor design such as continuous millifluidic and flow reactors to increase the yield of synthesized AgNWs on large scales is provided. The most recent proposed growth mechanisms and kinetics behind the polyol process are addressed. Finally, comparatively few available studies in green and sustainable development of 1D silver nanostructures through the application of natural products with inherent growth termination, stabilization, and capping characteristics are reviewed to provide an avenue to natural synthesis pathways to AgNWs. Future directions in both chemical and green synthesis approaches of AgNWs are addressed.

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A Possible Oriented Attachment Growth Mechanism for Silver Nanowire Formation

Abstract: Electron microscopy studies suggest that silver nanowires prepared by an approach reported earlier by us (

Cited by 60 publications

References 64 publications

Electrochemical monitoring of colloidal silver nanowires in aqueous samples

Electrochemical monitoring of colloidal silver nanowires in aqueous samples

Multifunctional Hybrid Fe<sub>2</sub>O<sub>3</sub>-Au Nanoparticles for Efficient Plasmonic Heating

Polyol Silver Nanowire Synthesis and the Outlook for a Green Process

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