Numerical analysis of ultrashort laser ablation: application for fabrication of nanoparticles and nanostructures

Abstract : Ultrashort laser ablation is a unique tool for material nanostructuring and for nanoparticle synthesis [1-4]. This method provides possibilities of a very precise control over the laser processing. In this study, first we examine nanoparticle formation by laser ablation under different experimental conditions and analyse the results based on the developed models [1]. The dynamics of the laser plume expansion is examined and the possibility of primary nanoparticle formation is analysed. Then, we consider thermalization process in a background environment, diffusion-driven nucleation and longer scale nanoparticle aggregation/sintering. In addition, laser-assisted fragmentation of nanoparticles is examined which plays role in multi-pulse regime. In this later case, nanoparticle size distribution results from an ensemble of processes thus revealing different particle populations. Calculations are performed for metals under different background conditions. The calculation results explain recent experimental findings and help to predict the role of the experimental parameters. The obtained nanoparticles are also used to form nanostructures. The performed analysis thus indicates ways of a control over the involved laser-assisted techniques. [1]T. E. Itina, N. Bouflous, J. Hermann, P. Delaporte, SPIE Proc. 8414, DOI: 10.1117 /12.923129 22(2011). [2] Laser ablation in liquids. Principles and application in the preparation of nanomaterials. Ed. by G.Y. Pan Stanford Publishing (2012) [3] M. E. Povarnitsyn et al. Phys. Rev. B. 75, 235414 (2007). [4] E. Barmina et al., Quantum Electronics. 11, 1012
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Contributor : Tatiana Itina <>
Submitted on : Monday, April 28, 2014 - 4:59:15 PM
Last modification on : Wednesday, July 25, 2018 - 2:05:31 PM

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M. E. Povarnitsyn, V. Fokin, A. Voloshko, L. Delfour, Tatiana Itina. Numerical analysis of ultrashort laser ablation: application for fabrication of nanoparticles and nanostructures. High Power Laser Ablation, HPLA 2014, Apr 2014, Santa Fe, United States. ⟨ujm-00984698⟩

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