One-Step Synthesis of Silver Nanowires with Ultra-Long Length and Thin Diameter to Make Flexible Transparent Conductive Films

Li, Yuxiu; Yuan, Ximin; Yang, Hongwei; Chao, Yunxiu; Guo, Shuailong; Wang, Chuan

doi:10.3390/ma12030401

Cited by 35 publications

(32 citation statements)

References 44 publications

(49 reference statements)

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“…AgNWs. TCFs based on AgNWs are considered to be the most promising materials to replace indium tin oxide for transparent display applications [26,27], and their performance is demonstrated to be closely related to the morphology and the aspect ratio of AgNWs [9,10,31]. AgNWs 1 with a diameter of ~29 nm and a length of ~90 µm, and AgNWs 2 with a diameter of ~47 nm and a length of ~99 µm were selected to prepare TCFs.…”

Section: Resultsmentioning

confidence: 99%

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Ultra-Uniform and Very Thin Ag Nanowires Synthesized via the Synergy of Cl−, Br− and Fe3+ for Transparent Conductive Films

et al. 2020

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The properties and applications of Ag nanowires (AgNWs) are closely related to their morphology and composition. Therefore, controlling the growth process of AgNWs is of great significance for technological applications and fundamental research. Here, silver nanowires (AgNWs) were synthesized via a typical polyol method with the synergistic effect of Cl−, Br−, and Fe3+ mediated agents. The synergistic impact of these mediated agents was investigated intensively, revealing that trace Fe3+ ions provided selective etching and hindered the strong etching effect from Cl− and Br− ions. Controlling this synergy allowed the obtainment of highly uniform AgNWs with sub-30 nm diameter and an aspect ratio of over 3000. Transparent conductive films (TCFs) based on these AgNWs without any post-treatment showed a very low sheet resistance of 4.7 Ω sq−1, a low haze of 1.08% at a high optical transmittance of 95.2% (at 550 nm), and a high figure of merit (FOM) of 1210. TCFs exhibited a robust electrical performance with almost unchanged resistance after 2500 bending cycles. These excellent high-performance characteristics demonstrate the enormous potential of our AgNWs in the field of flexible and transparent materials.

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Section: Resultsmentioning

confidence: 99%

“…The performance and corresponding applications of AgNWs are closely related to their size and microstructure [23,24]. Especially for use in TCFs, AgNWs are highly required with small diameter, high aspect ratio and uniformity [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Ultra-Uniform and Very Thin Ag Nanowires Synthesized via the Synergy of Cl−, Br− and Fe3+ for Transparent Conductive Films

et al. 2020

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“…As well, one-dimensional ferromagnetic wires display small size effects and a large shape anisotropy 14 , 15 . Therefore, the strategy of decorating a carbonaceous matrix with such nanostructures that reveal a strong dependence on geometrical parameters, like diameter and length 16 , 17 , supplies a key tool to design, tune and control the physical properties of composite materials for high-impact technology 18 – 20 , with ever-widen utilities, in order to obtain enhanced multiplexed attributes.…”

Section: Introductionmentioning

confidence: 99%

“…properties of composite materials for high-impact technology [18][19][20] , with ever-widen utilities, in order to obtain enhanced multiplexed attributes.…”

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confidence: 99%

Permalloy nanowires/graphene oxide composite with enhanced conductive properties

Jaimes

Márquez

Ovalle

et al. 2020

Sci Rep

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carbon-metal-based composites arise as advanced materials in the frontiers with nanotechnology, since the properties inherent to each component are multiplexed into a new material with potential applications. in this work, a novel composite consisting of randomly oriented permalloy nanowires (py nWs) intercalated among the sheets of multi-layered graphene oxide (Go) was performed. py nWs were synthesized by electrodeposition inside mesoporous alumina templates, while Go sheets were separated by means of sonication. Sequential deposition steps of Py NWs and GO flakes allowed to reach a reproducible and stable graphene oxide-based magnetic assembly. Microscopic and spectroscopic results indicate that py nWs are anchored on the surface as well as around the edges of the multi-layered Go, promoted by the presence of chemical groups, while magnetic characterization affords additional support to our hypothesis regarding the parallel orientation of the Py NWs with respect to the GO film, and also hints the parallel stacking of GO sheets with respect to the substrate. the most striking result remains on the electrochemical performance achieved by the composite that evidences an enhanced conductive behaviour compared to a standard electrode. Such effect provides an approach to the development of permalloy nanowires/graphene oxide-based electrodes as attractive candidates for molecular sensing devices. Composite materials arise as versatile candidates that could be designed to satisfy diverse technological applications due to their multifunctional behaviour. Since composites are obtained by combining two or more materials that have different attributes, such assembly provides to the composite of unique properties. In fact, several examples exist that have demonstrated the industrial development behind their production, being the concrete a well-known composite, where its strength under compression is improved by adding metal rods, wires, mesh or cables in order to create reinforced concrete. Most of the current composites have been made by carbon allotropes 1, 2. In particular, when graphene is combined with the metallic copper, a new material around 500 times stronger than copper is achieved 3. Likewise, composites constituted by graphene and nickel yield a strength larger than 180 times of nickel 4. A soft Ni-rich ferromagnet 5, 6 , that is widely employed as a magnetic core material in diverse technological applications, such as magnetic recording heads 7-9 , microinductors and magnetoresistive random access memories (MRAM) 10, 11 , is the so called permalloy (Py), an alloy with about 20% iron and 80% nickel content. On the one hand, bulk Py exhibits large magnetic permeability, enhanced sensitivity in sensing devices 12 , as well as low coercivity and remanence, of interest in magnetic shielding 13. In addition, it is a material with nearly zero magnetostriction, an attribute that promotes an easier integration in different devices 13. Besides, the high Ni content provides an excellent corrosion resistance to the alloy...

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“…Schematic representation of the proposed formation mechanism of high aspect ratio AgNWs through the bromine ion-(Br − -) assisted one-step synthesis method (reproduced from[166] under the Creative Commons Attribution 4.0 International (CC BY 4.0) License).…”

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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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One-Step Synthesis of Silver Nanowires with Ultra-Long Length and Thin Diameter to Make Flexible Transparent Conductive Films

Cited by 35 publications

References 44 publications

Ultra-Uniform and Very Thin Ag Nanowires Synthesized via the Synergy of Cl−, Br− and Fe3+ for Transparent Conductive Films

Ultra-Uniform and Very Thin Ag Nanowires Synthesized via the Synergy of Cl−, Br− and Fe3+ for Transparent Conductive Films

Permalloy nanowires/graphene oxide composite with enhanced conductive properties

Polyol Silver Nanowire Synthesis and the Outlook for a Green Process

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