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Interaction of a Low-Power Laser Radiation with Nanoparticles Formed over the Copper Melt in Rarefied Argon Atmosphere

1
Heat Transfer Laboratory, Joint Institute for High Temperatures, 17A Krasnokazarmennaya St, 111116 Moscow, Russia
2
X-BIO Institute, University of Tyumen, 6 Volodarskogo St, 625003 Tyumen, Russia
3
Laboratory of Physical Modelling of Two-Phase Flows, Joint Institute for High Temperatures, 13 (Bd 2) Izhorskaya St, 125412 Moscow, Russia
*
Author to whom correspondence should be addressed.
Received: 12 November 2020 / Revised: 27 November 2020 / Accepted: 8 December 2020 / Published: 16 December 2020
Two effects have been recently observed by the authors for the copper sample melted in a rarefied argon atmosphere. The first of these effects is a strong decrease in the normal reflectance of a copper sample with time just after the beginning of melting. A partially regular crystal structure was also formed on the surface of the solid sample after the experiment. Both effects were explained by generation of a cloud of levitating nanoparticles. Additional experiments reported in the present paper show that the rate of decrease in reflectance increases with pressure of argon atmosphere and the surface pattern on the solid sample after the experiment depends on the probe laser radiation. It is theoretically shown for the first time that the dependent scattering effects in the cloud of copper nanoparticles are responsible for the abnormal decrease in normal reflectance and also for the observed significant role of light pressure in deposition of nanoparticles on the sample surface. The predicted minimum of normal reflectance is in good agreement with the experimental value. View Full-Text
Keywords: copper melt; vapor condensation; levitating nanoparticles; rarefied argon atmosphere; Rayleigh scattering; normal reflectance; dependent scattering; deposition of particles; light pressure copper melt; vapor condensation; levitating nanoparticles; rarefied argon atmosphere; Rayleigh scattering; normal reflectance; dependent scattering; deposition of particles; light pressure
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MDPI and ACS Style

Dombrovsky, L.A.; Mendeleyev, V.Y. Interaction of a Low-Power Laser Radiation with Nanoparticles Formed over the Copper Melt in Rarefied Argon Atmosphere. Thermo 2021, 1, 1-14. https://0-doi-org.brum.beds.ac.uk/10.3390/thermo1010001

AMA Style

Dombrovsky LA, Mendeleyev VY. Interaction of a Low-Power Laser Radiation with Nanoparticles Formed over the Copper Melt in Rarefied Argon Atmosphere. Thermo. 2021; 1(1):1-14. https://0-doi-org.brum.beds.ac.uk/10.3390/thermo1010001

Chicago/Turabian Style

Dombrovsky, Leonid A., and Vladimir Y. Mendeleyev 2021. "Interaction of a Low-Power Laser Radiation with Nanoparticles Formed over the Copper Melt in Rarefied Argon Atmosphere" Thermo 1, no. 1: 1-14. https://0-doi-org.brum.beds.ac.uk/10.3390/thermo1010001

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