Preparation of Ag nanorods with high yield by polyol process

Jiu, Jinting; Murai, Kei Ichiro; Kim, Doseop; Kim, Keun Soo; Suganuma, Katsuaki

doi:10.1016/j.matchemphys.2008.09.028

Cited by 100 publications

(64 citation statements)

References 20 publications

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“…The AgNWs were synthesized by a polyol method [26,27]. The deposition of AgNWs onto the transparent substrates produces electrically high conductive electrodes with high transparency because AgNWs have a bulk resistivity as low as 1.59 × 10 -6 Ω·cm and the thin wires are unobtrusive to incident light.…”

Section: Resultsmentioning

confidence: 99%

“…AgNWs with a diameter of about 70 nm and a length of about 8 m were synthesized by the reduction of silver nitrate in the presence of Poly (vinylpyrrolidone) (PVP) in ethylene glycol [26,27]. 16 g of FeCl 3 solution (6 × 10 -4 mol/L, in ethylene glycol), 1.08 g of silver nitrate, and 0.98 g of PVP (average molecular mass 360 k in terms of monomeric units) were added to 125 g of ethylene glycol.…”

Section: Synthesis Of Agnws and Agnw Suspensionsmentioning

confidence: 99%

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Fabrication of silver nanowire transparent electrodes at room temperature

et al. 2011

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Silver nanowires (AgNWs) surrounded by insulating poly(vinylpyrrolidone) have been synthesized by a polyol process and employed as transparent electrodes. The AgNW transparent electrodes can be fabricated by heattreatment at about 200 °C which forms connecting junctions between AgNWs. Such a heating process is, however, one of the drawbacks of the fabrication of AgNW electrodes on heat-sensitive substrates. Here it has been demonstrated that the electrical conductivity of AgNW electrodes can be improved by mechanical pressing at 25 MPa for 5 s at room temperature. This simple process results in a low sheet resistance of 8.6 Ω/square and a transparency of 80.0%, equivalent to the properties of the AgNW electrodes heated at 200 °C . This technique makes it possible to fabricate AgNW transparent electrodes on heat-sensitive substrates. The AgNW electrodes on poly(ethylene terephthalate) films exhibited high stability of their electrical conductivities against the repeated bending test. In addition, the surface roughness of the pressed AgNW electrodes is one-third of that of the heat-treated electrode because the AgNW junctions are mechanically compressed. As a result, an organic solar cell fabricated on the pressed AgNW electrodes exhibited a power conversion as much as those fabricated on indium tin oxide electrodes. These findings enable continuous roll-to-roll processing at room temperature, resulting in relatively simple, inexpensive, and scalable processing that is suitable for forthcoming technologies such as organic solar cells, flexible displays, and touch screens.

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Section: Resultsmentioning

confidence: 99%

Section: Synthesis Of Agnws and Agnw Suspensionsmentioning

confidence: 99%

Fabrication of silver nanowire transparent electrodes at room temperature

et al. 2011

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“…After the effect of stirring during the growth was studied, the influence of the precursor to capping agent weight ratio, that is, the AgNO 3 to PVP weight ratio, was investigated. For the capping agent, we chose PVP with an average molecular (MW) weight of 360 kgmol −1 , referred to as PVP360k in the following, which is frequently reported in the literature for the polyol-based synthesis of AgNWs [28,34,[38][39][40]. Besides, for PVP360k, numerous synthesis protocols have been proposed that employed PVPs with a different average MW that in turn corresponds to a different average chain length.…”

Section: Solution-based Synthesis Of Silver Nanowiresmentioning

confidence: 99%

“…The chain lengths of the PVP are composed of vinylpyrrolidone monomers with an elemental formula of C 6 H 9 NO. Most studies report the use of PVP with a MW of 40 k [6,30,31], 55 k [29,32,35], 360 k [38,40] as well as 1,3 M [41][42][43]. Song et al [43] and Zhu et al [44] investigated the effect of the MW of PVP on the yield and shape of AgNWs.…”

Section: Solution-based Synthesis Of Silver Nanowiresmentioning

confidence: 99%

Comprehensive Synthesis Study of Well-Dispersed and Solution-Processed Metal Nanowires for Transparent Heaters

Bobinger

Dergianlis

Becherer

et al. 2018

Journal of Nanomaterials

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We review and extend the numerous polyol-based synthesis protocols and postdeposition treatments that have been reported for silver nanowires (AgNWs). After tailoring substantial process parameters such as the process time, temperature as well as the stirring speed, the polyvinylpyrrolidone (PVP) to silver nitrate (AgNO 3 ) ratio, and the type of PVP, a high mean aspect ratio of 800 could be achieved. Interestingly, the addition of a small portion of potassium chloride (KCl) not only leads to a reduction in diameter but also extremely enhances the nanowire dispersion and its stability. This effect is attributed to the role of KCl, which, along with PVP, acts as a cocapping agent. Furthermore, sprayed AgNW and copper nanowire (CuNW) films were tested as transparent heaters. The AgNWs could be operated at a power density of at least 0.72 W/cm 2 , which corresponds to a temperature of 213 ∘ C, whereas the CuNWs failed at a power density and temperature of 0.4 W/cm 2 and 150 ∘ C, respectively. Interestingly, the degradation of AgNWs shows a step-wise behavior and is mainly dominated by fragmentation, while the CuNWs are gradually oxidized.

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“…31,32 To 125 g of ethylene glycol 16 g of FeCl 3 solution (6 © 10 ¹4 M, in ethylene glycol), 1.08 g of silver nitrate, and 0.98 g PVP (average molecular weight 360 k in term of monomeric units) were added. After the mixture was heated at 150°C for 1.5 hour, 30 ml of the reacted suspension-was filtrated by a coated cellulose acetate membrane filter with a 47 mm diameter (Y100A047A, Toyo Roshi Kaisha, Ltd.) and the filtered AgNWs were dispersed in 30 ml of ethanol.…”

Section: Fabrications Of Transparent Agnw Electrodesmentioning

confidence: 99%

Silver Nanowire Networks as a Transparent Printable Electrode for Organic Photovoltaic Cells

et al. 2017

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Solution-processable AgNW electrodes are prepared by our mechanical press process and applied for organic photovoltaic (OPV) cells. OPV cells using the AgNW electrodes exhibit good power conversion efficiencies of 3.05% even with that of ITO electrode (3.06%). Our mechanical press process enable to make OPV cell with standard device structure of Glass/AgNWs/PEDOT:PSS/Organic layer/Al. Conventional AgNW electrode fabrication methods were not able to apply the standard device structure because of their high roughness. Our methods open a new application route of AgNWs as the transparent electrodes for OPV cells. The OPV cell performances indicate their high potential the AgNWs for a photovoltaic electrode as an alternative material for the conventional ITO electrode. Furthermore, our AgNW fabrication process is suitable to make an electrode on organic-based substrate materials, especially for paper fabricated from natural cellulose. The results showed in this report will open the door of paper electronics.

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Preparation of Ag nanorods with high yield by polyol process

Cited by 100 publications

References 20 publications

Fabrication of silver nanowire transparent electrodes at room temperature

Fabrication of silver nanowire transparent electrodes at room temperature

Comprehensive Synthesis Study of Well-Dispersed and Solution-Processed Metal Nanowires for Transparent Heaters

Silver Nanowire Networks as a Transparent Printable Electrode for Organic Photovoltaic Cells

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