Improvement of the thermal stability of dendritic silver-coated copper microparticles by surface modification based on molecular self-assembly

Kim, Tae Hyeong; Kim, Hyeji; Jang, Hyo Jun; Lee, Nara; Nam, Kwang Hyun; Chung, Dae-Won; Lee, Seung–Hyun

doi:10.1186/s40580-021-00265-8

Cited by 17 publications

(7 citation statements)

References 26 publications

(33 reference statements)

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“…As a functional material, silver at the micronano level shows a structure between crystalline and amorphous states, exhibits a modified surface molecular arrangement and crystal structure, and features enhanced surface activity [ 1 ]. The ultrafine silver powder shows spherical (or quasispherical), flake-like, dendritic, and microcrystalline morphologies [ 2 , 3 , 4 ]. Additionally, the micronano silver powder exhibits excellent performance in the fields of sound, light, electricity, magnetism, heat, and catalysis due to its small particle size, large specific surface area, high surface activity, and good catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Spherical Ultrafine Silver Particles Using Y-Type Microjet Reactor

Wan

et al. 2023

Materials

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Herein, micron-sized silver particles were prepared using the chemical reduction method by employing a Y-type microjet reactor, silver nitrate as the precursor, ascorbic acid as the reducing agent, and gelatin as the dispersion at room temperature (23 °C ± 2°C). Using a microjet reactor, the two reaction solutions collide and combine outside the reactor, thereby avoiding microchannel obstruction issues and facilitating a quicker and more convenient synthesis process. This study examined the effect of the jet flow rate and dispersion addition on the morphology and size of silver powder particles. Based on the results of this study, spherical and dendritic silver particles with a rough surface can be prepared by adjusting the flow rate of the reaction solution and gelatin concentration. The microjet flow rate of 75 mL/min and the injected gelatin amount of 1% of the silver nitrate mass produced spherical ultrafine silver particles with a size of 4.84 μm and a tap density of 5.22 g/cm3.

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Section: Introductionmentioning

confidence: 99%

Preparation of Spherical Ultrafine Silver Particles Using Y-Type Microjet Reactor

Wan

et al. 2023

Materials

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“…A typical ECA consists of a polymer matrix and one type of conductive llers. The polymer matrix provides the adhesive ability, and the conductive llers contribute to the electrical conductivity [4]. Due to stable chemical property and excellent conductive performance, silver (Ag) becomes the most widely used conductive ller in ECAs [5].…”

Section: Introductionmentioning

confidence: 99%

Novel epoxy adhesives based on conductive micron‐sized silver flowers

Zhang

et al. 2022

Polymer Composites

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Low silver contents are desirable for electrically conductive adhesives (ECAs) due to the high cost of silver. In the present work, micron ower-like silver particles (MFSPs) with long and thin petals are prepared by a novel, green, and facile chemical reduction method in an aqueous solution. The effects of reactant mass ratio and reactant concentration are investigated to control the morphology and size of MFSPs. Three kinds of MFSPs with different sizes are lled into an epoxy resin to prepare novel ECAs. Due to the easily formed conductive paths by such morphological silver particles, the prepared MFSP/epoxy composite adhesive has a low percolation threshold, a high conductivity and high adhesion strength at a very low silver content. When considering the optimal combination of low electrical resistance and high adhesion strength, the MFSPs obtained at the 1.5:1 ratio of ascorbic acid to silver nitrate are promising for preparing ECAs with a low Ag content of 30 wt which is the lowest content for ECAs compared with the literature. The synthesis process of MFSPs has the advantages of mild condition, simple process, and environmental friendship. This study provides a new way to prepare highly conductive Ag/epoxy adhesives with low silver contents.

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“…It has also been reported that even minor defects formed via heating and ultrasonic treatment participate in catalytic activity and provide stability. Dangling bonds due to the defects also play an important role in the catalytic reaction because they facilitate contact with important materials in applications [ 44 , 45 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Multi-Vacancy-Defect MWCNTs by the Removal of Metal Oxide Nanoparticles

et al. 2022

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This study aims to increase the specific surface area of multi-walled carbon nanotubes (MWCNTs) by forming and subsequently removing various metal oxide nanoparticles on them. We used facile methods, such as forming the particles without using a vacuum or gas and removing these particles through simple acid treatment. The shapes of the composite structures on which the metal oxide particles were formed and the formation of multi-vacancy-defect MWCNTs were confirmed via transmission electron microscopy and scanning electron microscopy. The crystallinity of the formed metal oxide particles was confirmed using X-ray diffraction analysis. Through specific surface area analysis and Raman spectroscopy, the number of defects formed and the degree and tendency of defect-formation in each metal were determined. In all the cases where the metal oxide particles were removed, the specific surface area increased, and the metal inducing the highest specific surface area was determined.

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Improvement of the thermal stability of dendritic silver-coated copper microparticles by surface modification based on molecular self-assembly

Cited by 17 publications

References 26 publications

Preparation of Spherical Ultrafine Silver Particles Using Y-Type Microjet Reactor

Preparation of Spherical Ultrafine Silver Particles Using Y-Type Microjet Reactor

Novel epoxy adhesives based on conductive micron‐sized silver flowers

Fabrication of Multi-Vacancy-Defect MWCNTs by the Removal of Metal Oxide Nanoparticles

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