Atomic Cluster Generation with an Atmospheric Pressure Spark Discharge Generator

Maisser, Anne; Barmpounis, K.; Attoui, Michel; Biskos, George; Schmidt‐Ott, A.

doi:10.1080/02786826.2015.1080812

Cited by 41 publications

(42 citation statements)

References 62 publications

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“…7,19,[24][25][26][27] In addition, the method offers good control over particle size which can range from that of atomic clusters to that of singlets or agglomerates consisting of sub-10 nm primary particles. 25,28,29 This technique have focused on fabricating NPs using spark ablation (at low frequencies) for a number of new applications (Table S1). 3,6,7,19,25,29,[33][34][35][36][37][38]31,[39][40][41][42][43][44] Note that carrier gases and electrodes determine the particle composition.…”

Section: High-yield and Continuous Synthesis Of Ultrapure Inorganic Nmentioning

confidence: 99%

Green manufacturing of metallic nanoparticles: a facile and universal approach to scaling up

et al. 2016

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Section: High-yield and Continuous Synthesis Of Ultrapure Inorganic Nmentioning

confidence: 99%

Green manufacturing of metallic nanoparticles: a facile and universal approach to scaling up

et al. 2016

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“…Gas-phase spark ablation enables the manufacturing of a range of NPs with different properties (Feng 2016). Its unique feature lies in the capability of single-step manufacturing NPs with virtually unlimited mixing combinations (Byeon et al 2008;Tabrizi et al 2009b;Maisser et al 2015;Feng et al 2015Feng et al , 2016aFeng et al , 2016c. The resulting NPs cover any form of nanoparticulate mixtures, mixed at nanometer and/or atomic scale.…”

Section: Introductionmentioning

confidence: 99%

Internally mixed nanoparticles from oscillatory spark ablation between electrodes of different materials

Feng

Ramlawi

Biskos

et al. 2018

Aerosol Science and Technology

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The increasing need for engineered alloy nanoparticles (NPs) in diverse fields has spurred efforts to explore efficient/green synthesis methods. In this respect, spark ablation provides a scalable and viable way for producing widely different types of mixed NPs. Most importantly, implementation of the spark has the great advantage to combine a wider range of materials, thereby allowing the synthesis of mixed NPs with virtually unlimited combinations. Here we show that polarity reversal of spark discharges between two electrodes consisting of different materials enables synthesis of alloy NPs, while having a good potential to control the broadness of their composition distribution. A model developed in this work provides a tool for tuning the ablation ratio between the electrodes by adjusting the electric characteristics of the spark circuit. The ablation ratio is equal to the mean composition of the resulting NPs. The model predictions are in accordance with measurements obtained here and in earlier works. The unique way of producing alloy NPs by spark ablation shown in this work becomes especially useful when the starting electrode materials are immiscible at macroscopic scale.

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“…In this study, we sought to stabilize the spark discharge process at high frequencies by first determining the factors which affect the spark stability. We hypothesized that the residual spark plasma is the cause of premature spark discharges, and hence developed a wire-toplate electrode configuration (Maisser et al 2015) which has increased local carrier gas flow velocity and electric field intensity around the spark zone, both of which are expected to contribute to fast removal of spark plasma generated by the preceding spark event. The maximum stable spark frequency and spark duration of wire-toplate electrodes were compared against those of rod-torod and wire-to-rod electrodes and the effect of the electric field intensity and gas velocity were confirmed separately.…”

Section: Introductionmentioning

confidence: 99%

High throughput nanoparticle generation utilizing high-frequency spark discharges via rapid spark plasma removal

Noh

Lee

Park

et al. 2016

Aerosol Science and Technology

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Scaling up the production capacity of spark discharge generated nanoparticles is crucial for their industrial application. Among various options, high-frequency spark discharge generation is a promising route as the mass production rate of nanoparticles should simply scale linearly with the spark frequency. However, reports of spark discharge generators operating above 1 kHz are scarce in the literature, as spark discharges at higher frequencies have been observed to be irregular, leading to premature spark discharges that result in a significantly lower mass production rate. In this study, we present a wire-to-plate electrode configuration that suppresses premature spark discharges during high-frequency operations above 1 kHz, and investigate the factors that contribute to the occurrence of premature spark discharges by comparing the performance of the wire-to-plate electrode configuration to those of rod-to-rod and wire-to-rod configurations. We identified that spark duration should be minimized to achieve stable spark discharge events as it correlates to the time required for the spark plasma to be completely removed from the spark zone, and found that increasing local electric field intensity and carrier gas velocity are both beneficial to achieving stable high frequency spark discharges. Lastly, using the wire-to-plate electrodes, we show that stable operation without premature spark discharges can be achieved up to 17.9 kHz and the copper nanoparticle production rate scales as expected (up to 7.6 mg/h) when premature spark discharges are eliminated during high frequency operations.

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Atomic Cluster Generation with an Atmospheric Pressure Spark Discharge Generator

Cited by 41 publications

References 62 publications

Green manufacturing of metallic nanoparticles: a facile and universal approach to scaling up

Green manufacturing of metallic nanoparticles: a facile and universal approach to scaling up

Internally mixed nanoparticles from oscillatory spark ablation between electrodes of different materials

High throughput nanoparticle generation utilizing high-frequency spark discharges via rapid spark plasma removal

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