scholarly journals Water-mediated polyol synthesis of pencil-like sharp silver nanowires suitable for nonlinear plasmonics

2019 ◽  
Vol 55 (77) ◽  
pp. 11630-11633 ◽  
Author(s):  
Tomoko Inose ◽  
Shuichi Toyouchi ◽  
Gang Lu ◽  
Kazuki Umemoto ◽  
Yuki Tezuka ◽  
...  
Keyword(s):  
Silver Nanowires ◽  
Pure Water ◽  
Polyol Synthesis ◽  
Simple Method ◽  
Nonlinear Plasmonics

We report a simple method to control the end shape of silver nanowires by adding pure water in the conventional polyol synthesis.

Salt-mediated polyol synthesis of silver nanowires in a continuous-flow tubular reactor

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 29872-29877 ◽  
Author(s):  
Kan-Sen Chou ◽  
Chung-Yen Hsu ◽  
Bo-Tau Liu
Keyword(s):  
Continuous Flow ◽  
Reduction Method ◽  
Flow Reactor ◽  
Silver Nanowires ◽  
Tubular Reactor ◽  
Polyol Synthesis ◽  
Continuous Flow Reactor

Silver nanowires were successfully synthesized by a polyol reduction method in a continuous-flow reactor with a yield of 2 g h−1.

FORMATION OF NICKEL NANOPARTICLES IN SOLUTIONS OF A HYDROPHILIC GRAFT COPOLYMER

2021 ◽  
Vol 43 (2) ◽  
pp. 79-94
Author(s):  
Т.B. ZHELTONOZHSKAYA ◽  
◽  
N.М. PERMYAKOVA ◽  
A.S. FOMENKO ◽  
L.R. KUNITSKAYA ◽  
...  
Keyword(s):  
Graft Copolymer ◽  
Nickel Nanoparticles ◽  
Pure Water ◽  
In Situ Synthesis ◽  
Simple Method ◽  
Resonance Band ◽  
Vis Spectroscopy ◽  
Copolymer Matrices ◽  
Kinetics Of

A graft copolymer of poly(vinyl alcohol) and polyacrylamide (PVA-g-PAAm) with interacting main and grafted chains was synthesized by radical matrix polymerization of PAAm from the PVA backbone in an aqueous medium. Its basic molecular parameters including the number and length (molecular weight) of grafts were determined using elemental analysis, DTGA and viscometry. The copolymer macromolecules formed special monomolecular micelles of elipsoidal shape and length ~18-64 nm in aqueous solutions due to the formation of intramolecular polycomplexes between the main and grafted chains. This copolymer was used as a hydrophilic matrix for the in situ synthesis of nickel nanoparticles (NiNPs) in aqueous solutions.On the basis of UV-Vis spectroscopy, an original and simple method for monitoring the kinetics of the formation and yield of metal nanoparticles in systems in which a surface plasmon resonance band does not appear has been proposed and implemented. Using this approach, the kinetics of borohydride reduction of Ni-salt to NiNPs in pure water and PVA-g-PAAm solutions was studied depending on the concentrations of Ni-salt and copolymer matrices. An increase in the initial rate of accumulation and yield of NiNPs with an increase in the concentration of Ni-salt and a decrease in both parameters in copolymer solutions in comparison with pure water was established. At the same time, the accumulation rate and NiNP yield in a complex way was depended on the matrix concentration that was determined by the ratio of such factors as a decrease in the diffusion rate of NaBH4 molecules in copolymer solutions and the accumulation of Ni2+-ions in matrix particles due to complexation with active chemical groups at the first stage of reduction process. The morphology and main structural elements of the NiNPs/PVA-g-PAAm composition were revealed using TEM. It was shown that the in situ synthesis of NiNPs in copolymer matrices was accompanied by the “detachment” of PAAm grafts from the main PVA chains and led to the appearance of two new structures, such as “hairy coils” and “hairy rods”, containing small spherical NiNPs (d~0,5–12,0 nm) in isolated and chain states, respectively. The appearance of the latter structures was explained by the formation of coordination complexes of Ni2+-ions with active groups of both PVA and PAAm chains at the first stage of the reduction reaction.

scholarly journals Polyol Silver Nanowire Synthesis and the Outlook for a Green Process

2020 ◽  
Vol 2020 ◽  
pp. 1-25 ◽  
Author(s):  
Shohreh Hemmati ◽  
Michael T. Harris ◽  
Dale P. Barkey
Keyword(s):  
Silver Nanowires ◽  
Synthesis Method ◽  
Polyol Process ◽  
Silver Nanowire ◽  
Polyol Synthesis ◽  
High Yield ◽  
Silver Nanostructures ◽  
Wearable Electronics ◽  
Aspect Ratios ◽  
Size And Morphology

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.

Silver nanowires with rounded ends: ammonium carbonate-mediated polyol synthesis, shape evolution and growth mechanism

CrystEngComm ◽  
2014 ◽  
Vol 16 (2) ◽  
pp. 244-251 ◽  
Author(s):  
Shaohong Liu ◽  
Boming Sun ◽  
Ji-guang Li ◽  
Jialin Chen
Keyword(s):  
Growth Mechanism ◽  
Ammonium Carbonate ◽  
Silver Nanowires ◽  
Polyol Synthesis ◽  
Shape Evolution

Light-assisted nucleation of silver nanowires during polyol synthesis

2011 ◽  
Vol 221 (2-3) ◽  
pp. 220-223 ◽  
Author(s):  
Hongzhen Lin ◽  
Tatsumi Ohta ◽  
Aniruddha Paul ◽  
James A. Hutchison ◽  
Kirilenko Demid ◽  
...  
Keyword(s):  
Silver Nanowires ◽  
Polyol Synthesis

scholarly journals Flexible transparent electrodes based on silver nanowires synthesized via a simple method

2017 ◽  
Vol 4 (9) ◽  
pp. 170756 ◽  
Author(s):  
De Li ◽  
Tao Han ◽  
Lei Zhang ◽  
Huai Zhang ◽  
Hui Chen
Keyword(s):  
Silver Nanowires ◽  
Cost Effective ◽  
Silver Nanowire ◽  
Vinyl Pyrrolidone ◽  
High Yield ◽  
Transparent Electrodes ◽  
X Ray Diffraction ◽  
Simple Method ◽  
Uv Visible ◽  
Poly Vinyl Pyrrolidone

Silver nanowires (Ag NWs) with the length of approximately 60 µm and the diameter of approximately 300 nm are prepared via a simple, cost-effective, high-yield and eco-friendly procedure under a high molar concentration ratio of silver nitrate (AgNO 3 ) solution to poly(vinyl pyrrolidone) solution. The pre-synthesized Ag NWs were analysed by scanning electron microscopy, X-ray diffraction and UV–visible spectrophotometer. Furthermore, the as-prepared silver nanowires were roll-coated on the surfaces of the polyethylene terephthalate (PET) substrates. By optimizing the concentration of silver nanowire solution, the flexible Ag NW/PET transparent electrodes with a sheet resistance of 3.8 Ω sq −1 at a transmittance of 70% can be fabricated. The results reported in this paper provide a basis for optimizing the growth of silver nanowires and performances of transparent electrodes.

Organic-Stabilizer-Free Polyol Synthesis of Silver Nanowires for Electrode Applications

2016 ◽  
Vol 55 (39) ◽  
pp. 11814-11818 ◽  
Author(s):  
Hwansu Sim ◽  
Shingyu Bok ◽  
Bongsung Kim ◽  
Minha Kim ◽  
Guh-Hwan Lim ◽  
...  
Keyword(s):  
Silver Nanowires ◽  
Polyol Synthesis
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