AFM investigation of nanoparticles formed on silicon surface by femtosecond laser pulses

Golovan, L. A.; Djun, I. O.; Dokukina, A. E.; Zabotnov, S. V.; Ezhov, A. A.; Кашкаров, П. К.; Maslova, N. E.; O., Ostapenko, I.; Panov, V. I.; Timoshenko, V. Yu.

doi:10.3103/s1062873809010122

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Cited by 4 publications

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Characterization of Nontoxic Nanomaterials for Biological Applications

Poulose,

Shibina,

Sreejith

et al. 2023

Biomedical Applications and Toxicity of Nanomaterials

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Characterization of Nontoxic Nanomaterials for Biological Applications

Poulose,

Shibina,

Sreejith

et al. 2023

Biomedical Applications and Toxicity of Nanomaterials

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Structural and optical properties of nanoparticles formed by laser ablation of porous silicon in liquids: Perspectives in biophotonics

et al. 2020

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The paper discusses the possibility of manufacturing silicon nanoparticles, which are suitable for contrasting biological tissues imaged by optical coherence tomography, by femtosecond laser ablation of porous silicon in various liquids. The manufactured nanoparticles are characterised by average sizes of 87, 112, and 102 nm for cases of ablation in water, ethanol, and liquid nitrogen, respectively, as well as a relatively narrow size distribution, which provides additional advantages for subsequent delivery into biological tissues. Electrochemical etching, which results in the formation of layers of porous silicon, allows the yield of ablation products to be increased several-fold by lowering the ablation threshold, thereby increasing the light scattering efficiency of the prepared suspensions compared with the case of using crystalline silicon as targets. The possibility of obtaining high-contrast images of a biotissue phantom based on an agar gel with embedded nanoparticles is shown. The magnitude of the contrast depends on the liquid used for ablation and correlates with the values of the reduced scattering coefficient of the studied suspensions.

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