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Kutlubulatova IA, Grigoryeva MS, Dimitreva VA, Lukashenko SY, Kanavin AP, Timoshenko VY, Ivanov DS. Molecular Dynamics Modeling of Pulsed Laser Fragmentation of Solid and Porous Si Nanoparticles in Liquid Media. Int J Mol Sci 2023; 24:14461. [PMID: 37833909 PMCID: PMC10572753 DOI: 10.3390/ijms241914461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/28/2023] [Accepted: 09/08/2023] [Indexed: 10/15/2023] Open
Abstract
The production of non-toxic and homogeneous colloidal solutions of nanoparticles (NPs) for biomedical applications is of extreme importance nowadays. Among the various methods for generation of NPs, pulsed laser ablation in liquids (PLAL) has proven itself as a powerful and efficient tool in biomedical fields, allowing chemically pure silicon nanoparticles to be obtained. For example, laser-synthesized silicon nanoparticles (Si NPs) are widely used as contrast agents for bio visualization, as effective sensitizers of radiofrequency hyperthermia for cancer theranostics, in photodynamic therapy, as carriers of therapeutic radionuclides in nuclear nanomedicine, etc. Due to a number of complex and interrelated processes involved in the laser ablation phenomenon, however, the final characteristics of the resulting particles are difficult to control, and the obtained colloidal solutions frequently have broad and multimodal size distribution. Therefore, the subsequent fragmentation of the obtained NPs in the colloidal solutions due to pulsed laser irradiation can be utilized. The resulting NPs' characteristics, however, depend on the parameters of laser irradiation as well as on the irradiated material and surrounding media properties. Thus, reliable knowledge of the mechanism of NP fragmentation is necessary for generation of a colloidal solution with NPs of predesigned properties. To investigate the mechanism of a laser-assisted NP fragmentation process, in this work, we perform a large-scale molecular dynamics (MD) modeling of FS laser interaction with colloidal solution of Si NPs. The obtained NPs are then characterized by their shape and morphological properties. The corresponding conclusion about the relative input of the properties of different laser-induced processes and materials to the mechanism of NP generation is drawn.
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Affiliation(s)
- Irina A. Kutlubulatova
- P. N. Lebedev Physical Institute of Russian Academy of Sciences, Leninskiy Prospekt, 53, 119991 Moscow, Russia; (I.A.K.); (M.S.G.); (S.Y.L.); (A.P.K.); (V.Y.T.)
- Institute of Engineering Physics for Biomedicine (PhysBio), Moscow Engineering Physics Institute (MEPhI), 115409 Moscow, Russia;
| | - Maria S. Grigoryeva
- P. N. Lebedev Physical Institute of Russian Academy of Sciences, Leninskiy Prospekt, 53, 119991 Moscow, Russia; (I.A.K.); (M.S.G.); (S.Y.L.); (A.P.K.); (V.Y.T.)
| | - Veronika A. Dimitreva
- Institute of Engineering Physics for Biomedicine (PhysBio), Moscow Engineering Physics Institute (MEPhI), 115409 Moscow, Russia;
| | - Stanislav Yu. Lukashenko
- P. N. Lebedev Physical Institute of Russian Academy of Sciences, Leninskiy Prospekt, 53, 119991 Moscow, Russia; (I.A.K.); (M.S.G.); (S.Y.L.); (A.P.K.); (V.Y.T.)
- Institute for Analytical Instrumentation of the Russian Academy of Sciences, Rizhsky Prospekt, 26, 190103 St. Petersburg, Russia
| | - Andrey P. Kanavin
- P. N. Lebedev Physical Institute of Russian Academy of Sciences, Leninskiy Prospekt, 53, 119991 Moscow, Russia; (I.A.K.); (M.S.G.); (S.Y.L.); (A.P.K.); (V.Y.T.)
| | - Viktor Yu. Timoshenko
- P. N. Lebedev Physical Institute of Russian Academy of Sciences, Leninskiy Prospekt, 53, 119991 Moscow, Russia; (I.A.K.); (M.S.G.); (S.Y.L.); (A.P.K.); (V.Y.T.)
- Department of Solid State Physics, Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia
| | - Dmitry S. Ivanov
- P. N. Lebedev Physical Institute of Russian Academy of Sciences, Leninskiy Prospekt, 53, 119991 Moscow, Russia; (I.A.K.); (M.S.G.); (S.Y.L.); (A.P.K.); (V.Y.T.)
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Künzner N, Kovalev D, Diener J, Gross E, Timoshenko VY, Polisski G, Koch F, Fujii M. Giant birefringence in anisotropically nanostructured silicon. Opt Lett 2001; 26:1265-1267. [PMID: 18049581 DOI: 10.1364/ol.26.001265] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We performed a study of the in-plane birefringence of anisotropically nanostructured Si layers, which exhibit a greater difference in the main value of the anisotropic refractive index than that of natural birefringent crystals. The anisotropy parameters were found to be strongly dependent on the typical size of the Si nanowires used to assemble the layers. This finding opens the possibility of an application of birefringent Si retarders to a wide spectral range for control of the polarization state of light.
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Kovalev D, Timoshenko VY, Künzner N, Gross E, Koch F. Strong explosive interaction of hydrogenated porous silicon with oxygen at cryogenic temperatures. Phys Rev Lett 2001; 87:068301. [PMID: 11497868 DOI: 10.1103/physrevlett.87.068301] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2001] [Indexed: 05/23/2023]
Abstract
We report new types of heterogeneous hydrogen-oxygen and silicon-oxygen branched chain reactions which have been found to proceed explosively after the filling of pores of hydrogen-terminated porous silicon (Si) by condensed or liquid oxygen in the temperature range of 4.2-90 K. Infrared vibrational absorption spectroscopy shows that, while initially Si nanocrystals assembling the layers have hydrogen-terminated surfaces, the final products of the reaction are SiO2 and H2O. Time-resolved optical experiments show that the explosive reaction develops in a time scale of 10(-6) s. We emphasize the remarkable structural properties of porous Si layers which are crucial for the strong explosive interaction.
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Affiliation(s)
- D Kovalev
- Technische Universität München, Physik-Department E16, D-85747 Garching, Germany
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