Copper nanoparticles synthesized by hydroxyl ion assisted alcohol reduction for conducting ink

Huaman, Jhon L. Cuya; Sato, Kimitaka; Kurita, Satoshi; Matsumoto, Takatoshi; Jeyadevan, Balachandran

doi:10.1039/c0jm04470a

Cited by 78 publications

(81 citation statements)

References 41 publications

(44 reference statements)

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“…After 100 min, at 182°C, the color changed from orange to red and a new absorption peak appeared at 570 nm. This could be as a consequence of Cu 2 O reduction to metallic Cu seeds [32]. The reduction reaction from Cu 2 O to Cu was relatively faster and the Cu 2 O absorption peak disappeared totally in 10 minutes leaving the peak corresponding to Cu NWs at 575 nm [21].…”

Section: Formation Mechanism Of Cu Nwsmentioning

confidence: 99%

“…Cu 2 O and Cu NPs possess localized surface plasmon resonance at around 400 to 700 nm [32], which depends on the particle size and morphology. Thus, the progression of the reaction Cu 2+ → Cu + → Cu 0 during heating at 182°C at different reaction times was analyzed using UV-Vis spectroscopy ( Figure 5).…”

Section: Formation Mechanism Of Cu Nwsmentioning

confidence: 99%

“…However, the products obtained were mostly Cu nanoparticles (NPs) and not Cu NWs. And also, unlike in the case of Ag NWs, the formation of intermediate phases such as cupric and cuprous compounds [32][33][34] seems to play an important role in determining the reduction rate, which is quite vital and decisive step defining the final morphology of metallic Cu. Cu NWs have been obtained in alkylamine-glucose or glycerol systems at relatively high temperatures [4].…”

Section: Introductionmentioning

confidence: 99%

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Large-Scale Cu Nanowire Synthesis by PVP-Ethylene Glycol Route

Huaman

Urushizaki

Jeyadevan

2018

Journal of Nanomaterials

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Cu nanowire (NW) is a promising cost-benefit conducting material that could be considered for the development of transparent conducting films (TCF). However, the development of Cu NW as an alternating material for Ag or Au is not only limited by its stability in atmospheric conditions in the nanometer range but also due to the nonavailability of a simple synthetic route to produce them in high yields and in large-scale. Here, a scheme to synthesize Cu NWs by reducing Cu nitrate in a Cl − ionpolyvinylpyrrolidine-(PVP-) ethylene glycol (EG) system is proposed. Cu NWs with average diameter around 60 nm and average length of about 40 μm was obtained under optimized experimental conditions. Furthermore, the formation of Cu NW was elucidated to be through the progression of the following sequential reduction steps: at first, Cu ions underwent partial reduction to form spherical Cu 2 O. Then, the spherical Cu 2 O particles were redissolved and reduced to metallic Cu 0 atoms that subsequently formed the Cu seeds. Thereafter, Cu seeds underwent etching to form multiply-twinned particles (MTP). Finally, these Cu MTP grew unidirectionally to form metallic Cu NWs.

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Section: Formation Mechanism Of Cu Nwsmentioning

confidence: 99%

Section: Formation Mechanism Of Cu Nwsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Large-Scale Cu Nanowire Synthesis by PVP-Ethylene Glycol Route

Huaman

Urushizaki

Jeyadevan

2018

Journal of Nanomaterials

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“…Over the past decade the polyol process has been used to synthesize metallic nanoparticles such as Pt [132,133], Pd [88,134], Au [135], Fe [136], Ni [137,138], Co [139], Ag [140,141], Cu [142,143], Sn [144], and Rh [73]. Platinum is one of the most active metal catalysts toward many electrochemical reactions, such as oxidation of small molecules and reduction of molecular oxygen in PEMFC.…”

Section: Orr Activity On Various Carbon Supported Nanoparticles Prepamentioning

confidence: 99%

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

et al. 2015

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Abstract:The oxygen reduction reaction (ORR) is the oldest studied and most challenging of the electrochemical reactions. Due to its sluggish kinetics, ORR became the major contemporary technological hurdle for electrochemists, as it hampers the commercialization of fuel cell (FC) technologies. Downsizing the metal particles to nanoscale introduces unexpected fundamental modifications compared to the corresponding bulk state. To address these fundamental issues, various synthetic routes have been developed in order to provide more versatile carbon-supported low platinum catalysts. Consequently, the approach of using nanocatalysts may overcome the drawbacks encountered in massive materials for energy conversion. This review paper aims at summarizing the recent important advances in carbon-supported metal nanoparticles preparation from colloidal methods (microemulsion, polyol, impregnation, Bromide Anion Exchange…) as cathode material in low temperature FCs. Special attention is devoted to the correlation of the structure of the nanoparticles and their catalytic properties. The influence of the synthesis method on the electrochemical properties of the resulting catalysts is also discussed. Emphasis on analyzing data from theoretical models to address the intrinsic and specific electrocatalytic properties, depending on the synthetic method, is incorporated throughout. The synthesis process-nanomaterials structure-catalytic activity relationships highlighted herein, provide ample new rational, convenient and OPEN ACCESSCatalysts 2015, 5 311 straightforward strategies and guidelines toward more effective nanomaterials design for energy conversion.

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“…Among the many important applications for printed electronics are photovoltaic devices 1 , sensors 2 , displays 3 and radio-frequency identification (RFID) tags 4 . Many types of functional materials can be formulated into printable inks, including electrically conducting 5 , semiconducting 6 and insulating materials 7 , as well as materials with magnetic 8 , optical 9 , chemical 10 or biological 11 functions. When comparing printing methods, inkjet allows comparably small feature size, less than 40 µm on some substrates 12 .…”

Section: Introductionmentioning

confidence: 99%

Assisted sintering of silver nanoparticle inkjet ink on paper with active coatings

et al. 2015

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Inkjet-printed metal films are important within the emerging field of printed electronics. For large-scale manufacturing, low-cost flexible substrates and low temperature sintering is desired. Tailored coated substrates are interesting for roll-to-roll fabrication of printed electronics, since a suitable tailoring of the ink-substrate system may reduce, or remove, the need for explicit sintering. Here we utilize specially designed coated papers, containing chloride as an active sintering agent. The built-in sintering agent greatly assists low-temperature sintering of inkjet-printed AgNP films. Further, we examine the effect of variations in coating pore size and precoating type. Interestingly, we find that the sintering is substantially affected by these parameters. IntroductionThe interest in printed electronics and other printed functionalities is considerable worldwide. In contrast to traditional subtractive photolithography-and etching processes, the printing process is purely additive, which means less material waste and a reduced need for processing chemicals. This results in cost savings and environmental advantages, in particular when large area coverage is desired. Additionally, printing processes have good compatibility with flexible substrates such as plastic films and paper. Applying electronic-or other functionality on flexible, low-cost substrates, across large areas in roll-to-roll processes, enables novel applications with large potential. Among the many important applications for printed electronics are photovoltaic devices . It is capable of covering large areas with simple and cost-effective setups. Furthermore, the non-contact nature of deposition allows it to be used for delicate and pressure-sensitive surfaces. The ink formulation is relatively challenging. To be reliably jetted, properties such as viscosity, surface tension, volatility and particle size need to be well controlled. To avoid aggregation, the particles are typically stabilized using polymers that adhere to the surfaces. Depending on the specific polymers and electrical charges in the system, the stabilization may be either steric, electrostatic or a combination of both (electrosteric) 13 . Some of the most common stabilizing polymers are polyvinylpyrrolidone (PVP) and polyvinyl alcohol (PVA) 14 .Electrically conducting layers are important since they are included in most applications of printed electronics. Although conductive inkjet inks may be formulated from several classes of materials, including conductive polymers 15 , carbon-based materials 16,17 , and metal nanoparticles (NPs) [18][19][20] . The metal NP inks are particularly suitable when high conductivity is required, for example when printing antennas 21 and circuit board conductors 22,23 .Paper-based substrates for printed electronics are interesting for several reasons. Environmental friendliness, flexibility and low cost are the key benefits. The physical and chemical properties may be altered by chemical additives or changes in materials and processes. Therefor...

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Copper nanoparticles synthesized by hydroxyl ion assisted alcohol reduction for conducting ink

Cited by 78 publications

References 41 publications

Large-Scale Cu Nanowire Synthesis by PVP-Ethylene Glycol Route

Large-Scale Cu Nanowire Synthesis by PVP-Ethylene Glycol Route

Recent Advances in Carbon Supported Metal Nanoparticles Preparation for Oxygen Reduction Reaction in Low Temperature Fuel Cells

Assisted sintering of silver nanoparticle inkjet ink on paper with active coatings

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