Structural and Photoluminescence Properties of Nanoparticles Formed by Laser Ablation of Porous Silicon in Ethanol and Liquid Nitrogen

Skobelkina, A. V.; Kashaev, F. V.; Zabotnov, S. V.; Kolchin, A. V.; Kaminskaya, T. P.; Presnov, D. E.; Сергеева, Е. А.; Kirillin, Mikhail; Golovan, L. A.; Кашкаров, П. К.

doi:10.1007/978-3-030-31866-6_22

Cited by 3 publications

(7 citation statements)

References 11 publications

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“…They also demonstrate visible fluorescence; however, its spectrum is shifted to red zone with maximum at 750 nm (Figure 7a). Similar broad and red-shifted fluorescence spectra were previously found for SiNPs formed by laser ablation of microporous silicon in ethanol [32]. Such features could be caused by the following reasons:…”

Section: Fluorescencesupporting

confidence: 82%

“…Blue shift of fluorescence peak after ablation does not exceed 30 nm in all cases and, most likely, is caused by transformation of SiNWs into SiNPs with reducing typical sizes of the structures as can be seen from comparison of respective SEM images (Figure 2c,d) and size distribution histograms (Figure 4e They also demonstrate visible fluorescence; however, its spectrum is shifted to red zone with maximum at 750 nm (Figure 7a). Similar broad and red-shifted fluorescence spectra were previously found for SiNPs formed by laser ablation of microporous silicon in ethanol [32]. Such features could be caused by the following reasons:…”

Section: Fluorescencesupporting

confidence: 82%

“…The relatively small mean size of SiNPS ensures their effective penetration in living organisms, moreover, it can be customized in the range of 14–65 nm in the course of fabrication by an appropriate choice of the targets and buffer liquids. Prevalence of the crystalline phase in the fabricated particles ensures their high refractive index (≈3.6) [ 45 ] and fluorescence emission [ 32 ] in the so-called biotissue diagnostic transparency window (700–1300 nm), which indicates their high potential as scattering and/or fluorescent contrast agents in optical bioimaging.…”

Section: Resultsmentioning

confidence: 99%

“…Our recent pilot studies revealed capability of SiNPs produced via laser ablation of PSi in ethanol and liquid nitrogen to emit fluorescence in the spectral range of 600-900 nm [32] which is suitable for optical bioimaging. Thus, a more comprehensive search for fluorescent SiNPs formed by means of PLAL both PSi and SiNW targets is promising.…”

Section: Fluorescencementioning

confidence: 99%

“…Earlier we have demonstrated prospects of using SiNPs produced via PLAL of PSi as OCT [18] and fluorescence imaging [32] contrasting agents. The main aim of this work is a comprehensive study of structural, absorption, scattering, and fluorescence properties of SiNPs fabricated via PLAL of both target types: PSi films and SiNW arrays with different doping levels which defines the morphology of the targets [18,33,34].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Nanoparticles Produced via Laser Ablation of Porous Silicon and Silicon Nanowires for Optical Bioimaging

Zabotnov

Skobelkina

Сергеева

et al. 2020

Sensors

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Modern trends in optical bioimaging require novel nanoproducts combining high image contrast with efficient treatment capabilities. Silicon nanoparticles are a wide class of nanoobjects with tunable optical properties, which has potential as contrasting agents for fluorescence imaging and optical coherence tomography. In this paper we report on developing a novel technique for fabricating silicon nanoparticles by means of picosecond laser ablation of porous silicon films and silicon nanowire arrays in water and ethanol. Structural and optical properties of these particles were studied using scanning electron and atomic force microscopy, Raman scattering, spectrophotometry, fluorescence, and optical coherence tomography measurements. The essential features of the fabricated silicon nanoparticles are sizes smaller than 100 nm and crystalline phase presence. Effective fluorescence and light scattering of the laser-ablated silicon nanoparticles in the visible and near infrared ranges opens new prospects of their employment as contrasting agents in biophotonics, which was confirmed by pilot experiments on optical imaging.

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Section: Fluorescencesupporting

confidence: 82%

Section: Fluorescencesupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Fluorescencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Nanoparticles Produced via Laser Ablation of Porous Silicon and Silicon Nanowires for Optical Bioimaging

Zabotnov

Skobelkina

Сергеева

et al. 2020

Sensors

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Silicon Nanoparticles Formed via Pulsed Laser Ablation of Porous Silicon in Liquids

et al. 2020

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Modeling of Short-Pulse Laser Interactions with Monolithic and Porous Silicon Targets with an Atomistic–Continuum Approach

Grigoryeva,

Kutlubulatova,

Lukashenko

et al. 2023

Nanomaterials

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The acquisition of reliable knowledge about the mechanism of short laser pulse interactions with semiconductor materials is an important step for high-tech technologies towards the development of new electronic devices, the functionalization of material surfaces with predesigned optical properties, and the manufacturing of nanorobots (such as nanoparticles) for bio-medical applications. The laser-induced nanostructuring of semiconductors, however, is a complex phenomenon with several interplaying processes occurring on a wide spatial and temporal scale. In this work, we apply the atomistic–continuum approach for modeling the interaction of an fs-laser pulse with a semiconductor target, using monolithic crystalline silicon (c-Si) and porous silicon (Si). This model addresses the kinetics of non-equilibrium laser-induced phase transitions with atomic resolution via molecular dynamics, whereas the effect of the laser-generated free carriers (electron–hole pairs) is accounted for via the dynamics of their density and temperature. The combined model was applied to study the microscopic mechanism of phase transitions during the laser-induced melting and ablation of monolithic crystalline (c-Si) and porous Si targets in a vacuum. The melting thresholds for the monolithic and porous targets were found to be 0.32 J/cm2 and 0.29 J/cm2, respectively. The limited heat conduction mechanism and the absence of internal stress accumulation were found to be involved in the processes responsible for the lowering of the melting threshold in the porous target. The results of this modeling were validated by comparing the melting thresholds obtained in the simulations to the experimental values. A difference in the mechanisms of ablation of the c-Si and porous Si targets was considered. Based on the simulation results, a prediction regarding the mechanism of the laser-assisted production of Si nanoparticles with the desired properties is drawn.

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Structural and Photoluminescence Properties of Nanoparticles Formed by Laser Ablation of Porous Silicon in Ethanol and Liquid Nitrogen

Cited by 3 publications

References 11 publications

Nanoparticles Produced via Laser Ablation of Porous Silicon and Silicon Nanowires for Optical Bioimaging

Nanoparticles Produced via Laser Ablation of Porous Silicon and Silicon Nanowires for Optical Bioimaging

Silicon Nanoparticles Formed via Pulsed Laser Ablation of Porous Silicon in Liquids

Modeling of Short-Pulse Laser Interactions with Monolithic and Porous Silicon Targets with an Atomistic–Continuum Approach

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