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16 November 2010 Silver nanoparticles produced by PLD in vacuum
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Proceedings Volume 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 775120 (2010) https://doi.org/10.1117/12.882081
Event: 18th International Symposium on Gas Flow and Chemical Lasers and High Power Lasers, 2010, Sofia, Bulgaria
Abstract
In this work, we report the fabrication of silver (Ag) nanoparticles on silica substrate in vacuum by PLD using a third harmonic of Nd:YAG laser (λ = 355 nm). The existence of Ag nanoparticles was evidenced by transmission electron microscopy (TEM) and an analysis of the size of the nanoparticles as a function of the number of laser pulses was performed. The Ag nanoparticles produced had mean diameters in the range from 1 nm to 15 nm, with the size distribution centered near 5 nm. The presence of the Ag nanoparticles was also evidenced from the appearance of a strong optical absorption band into the measured UV-VIS spectra, associated with surface plasmon resonance. Broadening of the absorption peak and its shifting to the longer wavelengths was observed as the number of laser pulses increased. A theoretical study of the optical properties of Ag nanoparticles predicts the presence of a thin oxide shell covering the nanoparticles.
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A. Og. Dikovska, I. G. Dimitrov, M. T. Alexandrov, N. N. Nedyalkov, and P. A. Atanasov "Silver nanoparticles produced by PLD in vacuum", Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 775120 (16 November 2010); https://doi.org/10.1117/12.882081
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