Comparison of Aerosol Pt, Au and Ag Nanoparticles Agglomerates Laser Sintering
Moscow Institute of Physics and Technology, National Research University, 141701 Dolgoprudny, Russia
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Academic Editor: Alina A. Manshina
Materials 2022, 15(1), 227; https://doi.org/10.3390/ma15010227
Received: 10 December 2021
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Revised: 25 December 2021
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Accepted: 27 December 2021
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Published: 29 December 2021
(This article belongs to the Special Issue Laser Technologies in Metal-Based Materials)
In this paper, we investigated the interaction of nanosecond pulsed-periodic infrared (IR) laser radiation at a 50 and 500 Hz repetition rate with aerosol platinum (Pt) and silver (Ag) nanoparticles agglomerates obtained in a spark discharge. Results showed the complete transformation of Pt dendrite-like agglomerates with sizes of 300 nm into individual spherical nanoparticles directly in a gas flow under 1053 nm laser pulses with energy density 3.5 mJ/cm2. Notably, the critical energy density required for this process depended on the size distribution and extinction of agglomerates nanoparticles. Based on the extinction cross-section spectra results, Ag nanoparticles exhibit a weaker extinction in the IR region in contrast to Pt, so they were not completely modified even under the pulses with energy density up to 12.7 mJ/cm2. The obtained results for Ag and Pt laser sintering were compared with corresponding modification of gold (Au) nanoparticles studied in our previous work. Here we considered the sintering mechanisms for Ag, Pt and Au nanoparticles agglomerates in the aerosol phase and proposed the model of their laser sintering based on one-stage for Pt agglomerates and two-stage shrinkage processes for Au and Ag agglomerates.
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Keywords:
aerosol nanoparticles; platinum; gold; silver; spark discharge; pulsed laser radiation; IR; shrinkage; plasmon resonance; extinction
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MDPI and ACS Style
Khabarov, K.; Nouraldeen, M.; Tikhonov, S.; Lizunova, A.; Seraya, O.; Filalova, E.; Ivanov, V. Comparison of Aerosol Pt, Au and Ag Nanoparticles Agglomerates Laser Sintering. Materials 2022, 15, 227. https://doi.org/10.3390/ma15010227
AMA Style
Khabarov K, Nouraldeen M, Tikhonov S, Lizunova A, Seraya O, Filalova E, Ivanov V. Comparison of Aerosol Pt, Au and Ag Nanoparticles Agglomerates Laser Sintering. Materials. 2022; 15(1):227. https://doi.org/10.3390/ma15010227
Chicago/Turabian StyleKhabarov, Kirill, Messan Nouraldeen, Sergei Tikhonov, Anna Lizunova, Olesya Seraya, Emiliia Filalova, and Victor Ivanov. 2022. "Comparison of Aerosol Pt, Au and Ag Nanoparticles Agglomerates Laser Sintering" Materials 15, no. 1: 227. https://doi.org/10.3390/ma15010227
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