Laser interactions with colloidal nanoparticles: mechanisms and control possibilities.

Abstract : Colloidal nanoparticles have found many applications in various areas as bio-sensing, bio-medicine, catalysis, optics and photonics, new energy sources, cosmetics, etc.. Laser systems provide unique possibilities not only for synthesis of these nanoparticles, but also for a control over their sizes. In fact, depending on the experimental conditions, laser interactions with colloidal nanoparticles can either promote nanoparticle growth or induce their fragmentation [1]. Because of the complexity of the physical and chemical processes involved, many of these interesting effects are still unclear and require much more analysis. In the present paper, we consider several aspects of laser interactions with nanoparticles in the presence of a liquid environment. In particular, we focus attention at such effects as (i) laser field propagation, scattering and absorption (Fig. 1); (ii) local field enhancement and liquid ionization [2,3]; (iii) nanoparticle heating; (iv) electron emission; (v) cavitation bubble formation; (vi) particle charging, fragmentation and aggregation. The effects of laser wavelength and pulse duration, liquid environment, as well as of nanoparticle material, initial particle sizes and concentration are underlined based on the proposed combined multi-physical model. The obtained results are used to analyze several experimental findings, such as nanoparticle fragmentation thresholds, mean size dependency on laser wavelength and fluence, and the role of laser pulse duration. The performed analysis thus helps to predict optimum laser parameters required for nanoparticle size manipulation. As a result, nanoparticles with sizes required for a given application can be produced. References [1] K. Maximova, A. Aristov, M. Sentis, A.V. Kabashin, Size-controllable synthesis of bare gold nanoparticles by femtosecond laser fragmentation in water Nanotechnology 26 (6), 065601 (2015) [2] D. K. Gramotnev, S. I. Bozhevolnyi, Nanofocusing of electromagnetic radiation. Nature Photonics,8, 13–22 (2014) . [3] F. Süßmann, L. Seiffert, S. Zherebtsov, V. Mondes, J. Stierle, M. Arbeiter, et al. Field propagation-induced directionality of carrier-envelope phase-controlled photoemission from nanospheres, Nature Communications, 6, 7944, (2015)
Type de document :
Communication dans un congrès
4th Conference on Advanced Nanoparticle Generation and Excitation by Lasers in Liquids, ANGEL 2016, May 2016, Essen, Germany. 4th Conference on Advanced Nanoparticle Generation and Excitation by Lasers in Liquids, ANGEL 2016, Essen, Germany, pp.28, 2016, Abstracts, 4th Conference on Advanced Nanoparticle Generation and Excitation by Lasers in Liquids, ANGEL 2016. 〈http://angel-conference.org/〉
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https://hal-ujm.archives-ouvertes.fr/ujm-01344546
Contributeur : Tatiana Itina <>
Soumis le : mardi 12 juillet 2016 - 10:38:16
Dernière modification le : jeudi 26 juillet 2018 - 01:10:54

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  • HAL Id : ujm-01344546, version 1

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Tatiana Itina, Anton Rudenko. Laser interactions with colloidal nanoparticles: mechanisms and control possibilities.. 4th Conference on Advanced Nanoparticle Generation and Excitation by Lasers in Liquids, ANGEL 2016, May 2016, Essen, Germany. 4th Conference on Advanced Nanoparticle Generation and Excitation by Lasers in Liquids, ANGEL 2016, Essen, Germany, pp.28, 2016, Abstracts, 4th Conference on Advanced Nanoparticle Generation and Excitation by Lasers in Liquids, ANGEL 2016. 〈http://angel-conference.org/〉. 〈ujm-01344546〉

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