1
|
Fronya AA, Antonenko SV, Karpov NV, Pokryshkin NS, Eremina AS, Yakunin VG, Kharin AY, Syuy AV, Volkov VS, Dombrovska Y, Garmash AA, Kargin NI, Klimentov SM, Timoshenko VY, Kabashin AV. Germanium Nanoparticles Prepared by Laser Ablation in Low Pressure Helium and Nitrogen Atmosphere for Biophotonic Applications. MATERIALS 2022; 15:ma15155308. [PMID: 35955245 PMCID: PMC9369467 DOI: 10.3390/ma15155308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/18/2022] [Accepted: 07/28/2022] [Indexed: 11/17/2022]
Abstract
Due to particular physico-chemical characteristics and prominent optical properties, nanostructured germanium (Ge) appears as a promising material for biomedical applications, but its use in biological systems has been limited so far due to the difficulty of preparation of Ge nanostructures in a pure, uncontaminated state. Here, we explored the fabrication of Ge nanoparticles (NPs) using methods of pulsed laser ablation in ambient gas (He or He-N2 mixtures) maintained at low residual pressures (1–5 Torr). We show that the ablated material can be deposited on a substrate (silicon wafer in our case) to form a nanostructured thin film, which can then be ground in ethanol by ultrasound to form a stable suspension of Ge NPs. It was found that these formed NPs have a wide size dispersion, with sizes between a few nm and hundreds of nm, while a subsequent centrifugation step renders possible the selection of one or another NP size fraction. Structural characterization of NPs showed that they are composed of aggregations of Ge crystals, covered by an oxide shell. Solutions of the prepared NPs exhibited largely dominating photoluminescence (PL) around 450 nm, attributed to defects in the germanium oxide shell, while a separated fraction of relatively small (5–10 nm) NPs exhibited a red-shifted PL band around 725 nm under 633 nm excitation, which could be attributed to quantum confinement effects. It was also found that the formed NPs exhibit high absorption in the visible and near-IR spectral ranges and can be strongly heated under photoexcitation in the region of relative tissue transparency, which opens access to phototherapy functionality. Combining imaging and therapy functionalities in the biological transparency window, laser-synthesized Ge NPs present a novel promising object for cancer theranostics.
Collapse
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.); (N.V.K.); (N.S.P.); (A.S.E.); (A.Y.K.); (Y.D.); (A.A.G.); (S.M.K.)
- Lebedev Physical Institute of the Russian Academy of Sciences, 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.); (N.V.K.); (N.S.P.); (A.S.E.); (A.Y.K.); (Y.D.); (A.A.G.); (S.M.K.)
- MEPHI, Institute of Nanoengineering in Electronics, Spintronics and Photonics, Kashirskoe sh. 31, 115409 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.); (N.V.K.); (N.S.P.); (A.S.E.); (A.Y.K.); (Y.D.); (A.A.G.); (S.M.K.)
| | - Nikolay S. Pokryshkin
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (N.V.K.); (N.S.P.); (A.S.E.); (A.Y.K.); (Y.D.); (A.A.G.); (S.M.K.)
- Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia;
| | - Anna S. Eremina
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (N.V.K.); (N.S.P.); (A.S.E.); (A.Y.K.); (Y.D.); (A.A.G.); (S.M.K.)
| | - Valery G. Yakunin
- Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory 1, 119991 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.); (N.V.K.); (N.S.P.); (A.S.E.); (A.Y.K.); (Y.D.); (A.A.G.); (S.M.K.)
| | - Alexander V. Syuy
- Moscow Institute of Physics and Technology (MIPT), Center for Photonics and 2D Materials, 141700 Dolgoprudny, Russia; (A.V.S.); (V.S.V.)
| | - Valentin S. Volkov
- Moscow Institute of Physics and Technology (MIPT), Center for Photonics and 2D Materials, 141700 Dolgoprudny, Russia; (A.V.S.); (V.S.V.)
| | - Yaroslava Dombrovska
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (N.V.K.); (N.S.P.); (A.S.E.); (A.Y.K.); (Y.D.); (A.A.G.); (S.M.K.)
| | - Alexander A. Garmash
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (N.V.K.); (N.S.P.); (A.S.E.); (A.Y.K.); (Y.D.); (A.A.G.); (S.M.K.)
| | - 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.); (N.V.K.); (N.S.P.); (A.S.E.); (A.Y.K.); (Y.D.); (A.A.G.); (S.M.K.)
| | - Victor Yu. Timoshenko
- MEPHI, Institute of Engineering Physics for Biomedicine (PhysBio), Kashirskoe sh. 31, 115409 Moscow, Russia; (A.A.F.); (S.V.A.); (N.V.K.); (N.S.P.); (A.S.E.); (A.Y.K.); (Y.D.); (A.A.G.); (S.M.K.)
- Lebedev Physical Institute of the Russian Academy of Sciences, Leninskiy Pr. 53, 119991 Moscow, Russia
- Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia;
- Correspondence: (V.Y.T.); (A.V.K.)
| | - Andrei V. Kabashin
- LP3 Laboratory, Aix-Marseille University, CNRS, 13288 Marseille, France
- Correspondence: (V.Y.T.); (A.V.K.)
| |
Collapse
|
2
|
Das B, Hossain SM, Pramanick AK, Dey A, Ray M. One-Pot Synthesis of Gel Glass Embedded with Luminescent Silicon Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2019; 11:2507-2515. [PMID: 30561193 DOI: 10.1021/acsami.8b17604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Preparation of highly luminescent glasses involves expensive and complicated processes and usually requires high temperature. In this work, we show that luminescent silicon (Si) nanoparticle (NP)- embedded silicate gel glasses can be developed under near-ambient conditions by a remarkably simple, one-pot strategy, without using any sophisticated instrumentation or technique. Simultaneous hydrolysis and reduction of (3-aminopropyl)triethoxysilane leads to the formation of colloidal Si nanocrystals that can be transformed to a glassy phase upon slow evaporation followed by freezing. Structural investigations reveal the formation of a sodium silicate gel glass framework having discernible shear bands, along with embedded Si NPs. High photoluminescence quantum yield (ca. 35-40%), low glass-transition temperature ( Tg ≈ 66-73 °C), strain-tolerant mechanical stability, and inexpensive preparation make the glass attractive for applications as display materials and photonic converters.
Collapse
Affiliation(s)
| | | | - Ashit Kumar Pramanick
- Materials Science Division , National Metallurgical Laboratory , Jamshedpur 831007 , India
| | - Arjun Dey
- Thermal Systems Group, U. R. Rao Satellite Centre (Formerly Known as ISRO Satellite Centre) , Indian Space Research Organisation , Bengaluru 560017 , India
| | | |
Collapse
|