In recent times, plasmonic effects are widely used to cover the different application purposes. Due to plasmonic effects the nanoparticles enhance some phenomena, such as Raman scattering, photocatalysis, and photogeneration. The understanding of nanoparticles and nanoalloys formation features makes it possible to obtain their specific composition and structure. In this work, several features of the Ag, Au nanoparticles and Ag-Cu, Au-Cu, Cu-Rh binary nanoalloys formation by thermal evaporation, condensation and heating on an inert surface in vacuum are shown. It is found by atomic force microscope investigation that rapid changes in the initial Ag array take place at a low temperature of 75–100 °C, and after the array enters a metastable state. It was found that the impact of the electron beam of a transmission electron microscope on the initial condensate leads to the migration of nanoparticles and their fusion despite their crystalline state. The difference in the formation of Ag-Cu, Au-Cu and Cu-Rh nanoalloys is demonstrated. The phase formation deviation from phase equilibrium diagram of bulk materials, associated with the size effect, is also demonstrated. It has been established that the considered features of the nanoparticles and nanoalloys formation are associated with the size effect of melting-point depression and existence of liquid layer of a certain thickness on the solid phase surface, which is in equilibrium with the solid phase.
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Key words:
nanoparticle, nanoalloy, melting, coalescence, gold, silver, copper, thermal evaporation
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Published in:
Technological processes and routes
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Bibliography link:
Gromov D. G., Dubkov S. V., Savitskiy A. I., Gavrilov S. A. Features of the nanoparticles and binary nanoalloys formation during thermal evaporation and condensation on an inert surface in vacuum. Proc. Univ. Electronics, 2023, vol. 28, no. 1, pp. 49–58. https://doi.org/10.24151/1561-5405-2023-28-1-49-58
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Financial source:
the work has been supported by the Russian Science Foundation (project no. 21-19-00761). Acknowledgments: the work has been carried out using equipment and with the assistance of specialists from Center for collective use “Diagnostics and Modification of Microstructures and Nanoobjects” (National Research University of Electronic Technology), Center for collective use of Scientific Research Institute of Physical Problems named after F. V. Lukin, and Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences.
Dmitry G. Gromov
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1); I. M. Sechenov First Moscow State Medical University (Russia, 119435, Moscow, Bolshaya Pirogovskaya st., 2, bld. 4)
Sergey V. Dubkov
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)
Andrey I. Savitskiy
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1); SMC “Technological Centre” (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1, bld. 7)
Sergey A. Gavrilov
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)
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