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Photoluminescent Si-based nanocrystals prepared by pulsed laser ablation in low-pressure helium-nitrogen mixtures for biomedical applications

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dc.contributor.authorKharin, A. Y.
dc.contributor.authorFronya, A. A.
dc.contributor.authorAntonenko, S. V.
dc.contributor.authorKarpov, N. V.
dc.contributor.authorDerzhavin, S. I.
dc.contributor.authorDombrovska, Y. I.
dc.contributor.authorGarmash, A. A.
dc.contributor.authorKargin, N. I.
dc.contributor.authorKlimentov, S. M.
dc.contributor.authorTimoshenko, V. Y.
dc.contributor.authorKabashin, A. V.
dc.contributor.authorФроня, Анастасия Андреевна
dc.contributor.authorАнтоненко, Сергей Васильевич
dc.contributor.authorГармаш, Александр Александрович
dc.contributor.authorКаргин, Николай Иванович
dc.contributor.authorКлиментов, Сергей Михайлович
dc.contributor.authorТимошенко, Виктор Юрьевич
dc.contributor.authorКабашин, Андрей Викторович
dc.date.accessioned2024-11-26T12:26:24Z
dc.date.available2024-11-26T12:26:24Z
dc.date.issued2020
dc.description.abstract© 2020 SPIE.Nanocrystalline silicon (Si) films were synthesized by nanosecond laser ablation of crystalline Si targets in low-pressure helium (He) and nitrogen (N2) gas mixtures. Photoluminescence (PL) spectra of the prepared samples were found to depend on the He/N2 ratio in the gas mixture. The ablation pure He atmosphere allowed us to prepare Si nanocrystals (NCs) exhibiting a PL band in red-near-IR range, while samples prepared in the presence of N2 exhibited a strong PL band with maximum in the green-yellow region. Such a modification of PL properties can be explained by the presence of amorphous Si oxynitride (a-SiNxOy) on the surface of Si-NCs. Structural studies of the prepared samples by means of the scanning electron microscopy revealed different morphology for Si-NCs produced under different gas mixtures. After treating of the films by ultrasound and dispersing in water, Si-NCs can be used as novel biodegradable markers for bioimaging, while the observed spectral tailoring effect makes possible an adjustment of the PL emission of such markers to a concrete bioimaging task.
dc.identifier.citationPhotoluminescent Si-based nanocrystals prepared by pulsed laser ablation in low-pressure helium-nitrogen mixtures for biomedical applications / Kharin, A.Y. [et al.] // Proceedings of SPIE - The International Society for Optical Engineering. - 2020. - 11269. - 10.1117/12.2551482
dc.identifier.doi10.1117/12.2551482
dc.identifier.urihttps://www.doi.org/10.1117/12.2551482
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85083291048&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000565694000001
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/21548
dc.relation.ispartofProceedings of SPIE - The International Society for Optical Engineering
dc.titlePhotoluminescent Si-based nanocrystals prepared by pulsed laser ablation in low-pressure helium-nitrogen mixtures for biomedical applications
dc.typeConference Paper
dspace.entity.typePublication
oaire.citation.volume11269
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