Effect of exit-orifice diameter on Cu nanoparticles produced by gas-aggregation source

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F21%3A43961793" target="_blank" >RIV/49777513:23520/21:43961793 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.surfcoat.2021.127196" target="_blank" >https://doi.org/10.1016/j.surfcoat.2021.127196</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.surfcoat.2021.127196" target="_blank" >10.1016/j.surfcoat.2021.127196</a>

Result language
angličtina
Original language name
Effect of exit-orifice diameter on Cu nanoparticles produced by gas-aggregation source
Original language description
Gas-aggregation source (GAS) was used to prepare Cu nanoparticles. By changing the diameter of the exit orifice of the aggregation chamber, we were able to isolate and investigate the effect of the flow rate of the working gas at a constant pressure inside the aggregation chamber. We show that the conventional approach of changing pressure by adjusting the flow rate (at a constant orifice diameter) does not significantly influence the nanoparticle size. However, when the pressure is held constant, changing the flow rate has a notable effect. Based on a theoretical study, we suggest that the determining parameter which needs to be considered is the pressure to flow rate ratio. This ratio determines the residence time of the nanoparticles inside the aggregation chamber (and therefore the time available for them to grow) and is constant for a constant orifice diameter. Decreasing the orifice diameter, however, increases the pressure to flow rate ratio, which gives the nanoparticles longer time inside the aggregation chamber and allows them to grow larger. Apart from their size, the orifice diameter also influences the mass flux and its angular distribution.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20506 - Coating and films

Project
<a href="/en/project/GA19-13174S" target="_blank" >GA19-13174S: Advanced hydrogen-gas sensing nanomaterials with a tailored architecture</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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