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Fronya AA, Antonenko SV, Kharin AY, Muratov AV, Aleschenko YA, Derzhavin SI, Karpov NV, Dombrovska YI, Garmash AA, Kargin NI, Klimentov SM, Timoshenko VY, Kabashin AV. Tailoring Photoluminescence from Si-Based Nanocrystals Prepared by Pulsed Laser Ablation in He-N 2 Gas Mixtures. Molecules 2020; 25:molecules25030440. [PMID: 31973084 PMCID: PMC7037818 DOI: 10.3390/molecules25030440] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Revised: 01/14/2020] [Accepted: 01/19/2020] [Indexed: 11/16/2022] Open
Abstract
Using methods of pulsed laser ablation from a silicon target in helium (He)-nitrogen (N2) gas mixtures maintained at reduced pressures (0.5–5 Torr), we fabricated substrate-supported silicon (Si) nanocrystal-based films exhibiting a strong photoluminescence (PL) emission, which depended on the He/N2 ratio. We show that, in the case of ablation in pure He gas, Si nanocrystals exhibit PL bands centered in the “red - near infrared” (maximum at 760 nm) and “green” (centered at 550 nm) spectral regions, which can be attributed to quantum-confined excitonic states in small Si nanocrystals and to local electronic states in amorphous silicon suboxide (a-SiOx) coating, respectively, while the addition of N2 leads to the generation of an intense “green-yellow” PL band centered at 580 nm. The origin of the latter band is attributed to a radiative recombination in amorphous oxynitride (a-SiNxOy) coating of Si nanocrystals. PL transients of Si nanocrystals with SiOx and a-SiNxOy coatings demonstrate nonexponential decays in the micro- and submicrosecond time scales with rates depending on nitrogen content in the mixture. After milling by ultrasound and dispersing in water, Si nanocrystals can be used as efficient non-toxic 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.
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Affiliation(s)
- Anastasiya A. Fronya
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (A.Y.K.); (Y.A.A.); (S.I.D.); (N.V.K.); (Y.I.D.); (A.A.G.)
- Lebedev Physical Institute of the Russian Acad. Sci., Leninskiy Pr. 53, 119991 Moscow, Russia;
| | - Sergey V. Antonenko
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (A.Y.K.); (Y.A.A.); (S.I.D.); (N.V.K.); (Y.I.D.); (A.A.G.)
- MEPHI, Institute of Nanoengineering in Electronics, Spintronics and Photonics, Kashirskoe sh. 31, 115409 Moscow, Russia;
| | - Alexander Yu. Kharin
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (A.Y.K.); (Y.A.A.); (S.I.D.); (N.V.K.); (Y.I.D.); (A.A.G.)
| | - Andrei V. Muratov
- Lebedev Physical Institute of the Russian Acad. Sci., Leninskiy Pr. 53, 119991 Moscow, Russia;
| | - Yury A. Aleschenko
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (A.Y.K.); (Y.A.A.); (S.I.D.); (N.V.K.); (Y.I.D.); (A.A.G.)
- Lebedev Physical Institute of the Russian Acad. Sci., Leninskiy Pr. 53, 119991 Moscow, Russia;
| | - Sergey I. Derzhavin
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (A.Y.K.); (Y.A.A.); (S.I.D.); (N.V.K.); (Y.I.D.); (A.A.G.)
- Prokhorov General Physics Institute of the Russian Acad. Sci., Vavilova St. 38, 117942 Moscow, Russia
| | - Nikita V. Karpov
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (A.Y.K.); (Y.A.A.); (S.I.D.); (N.V.K.); (Y.I.D.); (A.A.G.)
| | - Yaroslava I. Dombrovska
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (A.Y.K.); (Y.A.A.); (S.I.D.); (N.V.K.); (Y.I.D.); (A.A.G.)
| | - Alexander A. Garmash
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (A.Y.K.); (Y.A.A.); (S.I.D.); (N.V.K.); (Y.I.D.); (A.A.G.)
- MEPHI, Institute of Nanoengineering in Electronics, Spintronics and Photonics, Kashirskoe sh. 31, 115409 Moscow, Russia;
| | - Nikolay I. Kargin
- MEPHI, Institute of Nanoengineering in Electronics, Spintronics and Photonics, Kashirskoe sh. 31, 115409 Moscow, Russia;
| | - Sergey M. Klimentov
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (A.Y.K.); (Y.A.A.); (S.I.D.); (N.V.K.); (Y.I.D.); (A.A.G.)
| | - Victor Yu. Timoshenko
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (A.Y.K.); (Y.A.A.); (S.I.D.); (N.V.K.); (Y.I.D.); (A.A.G.)
- Lebedev Physical Institute of the Russian Acad. Sci., Leninskiy Pr. 53, 119991 Moscow, Russia;
- Lomonosov Moscow State University, Physics Dep., Leninskie Gory 1, 119991 Moscow, Russia
- Correspondence: (V.Y.T.); (A.V.K.)
| | - Andrei V. Kabashin
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (A.Y.K.); (Y.A.A.); (S.I.D.); (N.V.K.); (Y.I.D.); (A.A.G.)
- Aix Marseille Univ, CNRS, LP3, Campus de Luminy, Case 917, 13288 Marseille, France
- Correspondence: (V.Y.T.); (A.V.K.)
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