Influence of the sintering temperature on morphology and particle size of silver synthesized by spark discharge

Лизунова, А. А.; Ефимов, А. А.; Arsenov, Pavel V.; Иванов, В. В.

doi:10.1088/1757-899x/307/1/012081

Cited by 18 publications

(11 citation statements)

References 12 publications

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“…This temperature range is probably responsible for the beginning of the stage of the sintering process of nanoparticles, at which contacts and necks between nanoparticles begin to form. Moreover, it can also be seen from the graph in Figure 2a that the complete sintering of nanoparticles occurs in the temperature range from 300 to 500 • C, where the line electrical resistivity reaches minimum values of the order of~2.3 µΩ•cm and then ceases to change with increasing substrate temperature [39,40]. In the SEM image of the surface of the line heat-treated at 400 • C, it can be seen that the line consists of a bulk monolitized material with a certain number of micro-sized pores formed during sintering of nanoparticles.…”

Section: Resultsmentioning

confidence: 86%

Aerosol Jet Printing of Silver Lines with A High Aspect Ratio on A Heated Silicon Substrate

et al. 2020

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In this work, we studied the formation of conductive silver lines with high aspect ratios (AR = thickness/width) > 0.1 using the modernized method of aerosol jet printing on a heated silicon substrate. The geometric (AR) and electrical (resistivity) parameters of the formed lines were investigated depending on the number of printing layers (1–10 layers) and the temperature of the substrate (25–300 °C). The AR of the lines increased as the number of printing layers and the temperature of the substrate increased. An increase in the AR of the lines with increasing substrate temperature was associated with a decrease in the ink spreading as a result of an increase in the rate of evaporation of nano-ink. Moreover, with an increase in the substrate temperature of more than 200 °C, a significant increase in the porosity of the formed lines was observed, and as a result, the electrical resistivity of the lines increased significantly. Taking into account the revealed regularities, it was demonstrated that the formation of silver lines with a high AR > 0.1 and a low electrical resistivity of 2–3 μΩ∙cm is advisable to be carried out at a substrate temperature of about 100 °C. The adhesion strength of silver films formed on a heated silicon substrate is 2.8 ± 0.9 N/mm2, which further confirms the suitability of the investigated method of aerosol jet printing for electronic applications.

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Section: Resultsmentioning

confidence: 86%

Aerosol Jet Printing of Silver Lines with A High Aspect Ratio on A Heated Silicon Substrate

et al. 2020

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“…Very few spherical crystal Ge particles that are much larger, up to 37 nm, are detected. The material represents the mean diameter of primary particles 6.8 ± 5.2 nm and follows a lognormal particle distribution ( Figure 2 a), typical for spark discharge processes [ 19 , 20 , 21 , 22 ]. The same particle morphology was observed for the samples, prepared at 325 and 475 °C, with the mean primary particle sizes 10.4 ± 7.2 and 17.0 ± 10.3 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Germanium nanoparticles were produced using the aerosol spark discharge generator developed in our laboratory [ 20 ]. The system was supplemented by a tube furnace for nanoparticle sintering at different temperatures in gas flow ( Figure 1 ) [ 22 ]. Electrode material is evaporated in the environs of the spark, initiated by gas breakdown under high-power current impulses.…”

Section: Methodsmentioning

confidence: 99%

“…Electrode material is evaporated in the environs of the spark, initiated by gas breakdown under high-power current impulses. The erosion produces atomic clusters, which agglomerate and form primary nanoparticles with a size of 5 to 8 nm [ 19 , 20 , 21 , 22 , 23 ]. As the primary nanoparticles move further along the gas path, they collide and stick together, forming fractal-like agglomerates ( Figure 2 a).…”

Section: Methodsmentioning

confidence: 99%

“…The goal of the present study is an investigation of the special aspects of germanium nanoparticle production by the spark discharge method in ultrapure argon atmosphere, with additional in-flow sintering at temperatures ranging from 25 to 800 °C. In a previous paper we showed that the sintering temperature can significantly alter the morphology and the size of silver nanoparticles [ 22 ]. Taking into account the sensitivity of optical properties towards size variations, the main task of the project was to obtain germanium nanoparticles with a wide range of dimensions and to investigate the evolution in their structure, morphology, photoluminescence and extinction properties caused by high temperatures, as well as to reveal the dependency of optical properties on size and structure characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Temperature on the Morphology and Optical Properties of Spark Discharge Germanium Nanoparticles

et al. 2020

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We report the spark discharge synthesis of aerosol germanium nanoparticles followed by sintering in a tube furnace at different temperatures varying from 25 to 800 °C. The size, structure, chemical composition and optical properties were studied. We have demonstrated a melting mechanism of nanoparticles agglomerates, the growth of the mean primary particle size from 7 to 51 nm and the reduction of the size of agglomerates with a temperature increase. According to transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) data, primary nanoparticles sintered at temperatures from 25 to 475 °C basically have a structure of Ge crystals embedded in a GeOx amorphous matrix, as well as visible photoluminescence (PL) with the maximum at 550 nm. Pure germanium nanoparticles are prepared at temperatures above 625 °C and distinguished by their absence of visible PL. The shape of the experimental UV-vis-NIR extinction spectra significantly depends on the size distribution of the germanium crystals. This fact was confirmed by simulations according to Mie theory for obtained ensembles of germanium nanoparticles.

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Characterising the silver particle generator; a pathway towards standardising silver aerosol generation

Hammer

Irwin²,

Swanson

et al. 2022

Journal of Aerosol Science

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Influence of the sintering temperature on morphology and particle size of silver synthesized by spark discharge

Cited by 18 publications

References 12 publications

Aerosol Jet Printing of Silver Lines with A High Aspect Ratio on A Heated Silicon Substrate

Aerosol Jet Printing of Silver Lines with A High Aspect Ratio on A Heated Silicon Substrate

Effects of Temperature on the Morphology and Optical Properties of Spark Discharge Germanium Nanoparticles

Characterising the silver particle generator; a pathway towards standardising silver aerosol generation

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