Silica-coated upconversion lanthanide nanoparticles: The effect of crystal design on morphology, structure and optical properties
NaYF4:Yb3+/Er3+ nanoparticles were synthesized by thermal decomposition of lanthanide trifluoroacetates using oleylamine (OM) as both solvent and surface binding ligand. The effect of reaction temperature and time on the properties of the particles was investigated. The nanoparticles were characteri...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2015-12-01
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| Series: | Beilstein Journal of Nanotechnology |
| Subjects: | |
| Online Access: | https://doi.org/10.3762/bjnano.6.235 |
| _version_ | 1828154909364584448 |
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| author | Uliana Kostiv Miroslav Šlouf Hana Macková Alexander Zhigunov Hana Engstová Katarína Smolková Petr Ježek Daniel Horák |
| author_facet | Uliana Kostiv Miroslav Šlouf Hana Macková Alexander Zhigunov Hana Engstová Katarína Smolková Petr Ježek Daniel Horák |
| author_sort | Uliana Kostiv |
| collection | DOAJ |
| description | NaYF4:Yb3+/Er3+ nanoparticles were synthesized by thermal decomposition of lanthanide trifluoroacetates using oleylamine (OM) as both solvent and surface binding ligand. The effect of reaction temperature and time on the properties of the particles was investigated. The nanoparticles were characterized by transmission electron microscopy (TEM), electron diffraction (ED), energy dispersive spectroscopy (EDX), dynamic light scattering (DLS), thermogravimetric analysis (TGA), elemental analysis and X-ray diffraction (XRD) to determine morphology, size, polydispersity, crystal structure and elemental composition of the nanocrystals. TEM microscopy revealed that the morphology of the nanoparticles could be fine-tuned by modifying of the synthetic conditions. A cubic-to-hexagonal phase transition of the NaYF4:Yb3+/Er3+ nanoparticles at temperatures above 300 °C was confirmed by both ED and XRD. Upconversion luminescence under excitation at 980 nm was observed in the luminescence spectra of OM–NaYF4:Yb3+/Er3+ nanoparticles. Finally, the OM–NaYF4:Yb3+/Er3+ nanoparticles were coated with a silica shell to enable further functionalization and increase biocompatibility and stability in aqueous media, preventing particle aggregation. |
| first_indexed | 2024-04-11T22:45:50Z |
| format | Article |
| id | doaj.art-fd0fc664aa4f42c2910dedc41ebc6a07 |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-04-11T22:45:50Z |
| publishDate | 2015-12-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-fd0fc664aa4f42c2910dedc41ebc6a072022-12-22T03:58:46ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862015-12-01612290229910.3762/bjnano.6.2352190-4286-6-235Silica-coated upconversion lanthanide nanoparticles: The effect of crystal design on morphology, structure and optical propertiesUliana Kostiv0Miroslav Šlouf1Hana Macková2Alexander Zhigunov3Hana Engstová4Katarína Smolková5Petr Ježek6Daniel Horák7Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám. 2, 162 06 Prague 6, Czech RepublicInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám. 2, 162 06 Prague 6, Czech RepublicInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám. 2, 162 06 Prague 6, Czech RepublicInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám. 2, 162 06 Prague 6, Czech RepublicInstitute of Physiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague 4, Czech RepublicInstitute of Physiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague 4, Czech RepublicInstitute of Physiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague 4, Czech RepublicInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám. 2, 162 06 Prague 6, Czech RepublicNaYF4:Yb3+/Er3+ nanoparticles were synthesized by thermal decomposition of lanthanide trifluoroacetates using oleylamine (OM) as both solvent and surface binding ligand. The effect of reaction temperature and time on the properties of the particles was investigated. The nanoparticles were characterized by transmission electron microscopy (TEM), electron diffraction (ED), energy dispersive spectroscopy (EDX), dynamic light scattering (DLS), thermogravimetric analysis (TGA), elemental analysis and X-ray diffraction (XRD) to determine morphology, size, polydispersity, crystal structure and elemental composition of the nanocrystals. TEM microscopy revealed that the morphology of the nanoparticles could be fine-tuned by modifying of the synthetic conditions. A cubic-to-hexagonal phase transition of the NaYF4:Yb3+/Er3+ nanoparticles at temperatures above 300 °C was confirmed by both ED and XRD. Upconversion luminescence under excitation at 980 nm was observed in the luminescence spectra of OM–NaYF4:Yb3+/Er3+ nanoparticles. Finally, the OM–NaYF4:Yb3+/Er3+ nanoparticles were coated with a silica shell to enable further functionalization and increase biocompatibility and stability in aqueous media, preventing particle aggregation.https://doi.org/10.3762/bjnano.6.235lanthanidenanoparticlesoleylaminesilicaupconversion |
| spellingShingle | Uliana Kostiv Miroslav Šlouf Hana Macková Alexander Zhigunov Hana Engstová Katarína Smolková Petr Ježek Daniel Horák Silica-coated upconversion lanthanide nanoparticles: The effect of crystal design on morphology, structure and optical properties Beilstein Journal of Nanotechnology lanthanide nanoparticles oleylamine silica upconversion |
| title | Silica-coated upconversion lanthanide nanoparticles: The effect of crystal design on morphology, structure and optical properties |
| title_full | Silica-coated upconversion lanthanide nanoparticles: The effect of crystal design on morphology, structure and optical properties |
| title_fullStr | Silica-coated upconversion lanthanide nanoparticles: The effect of crystal design on morphology, structure and optical properties |
| title_full_unstemmed | Silica-coated upconversion lanthanide nanoparticles: The effect of crystal design on morphology, structure and optical properties |
| title_short | Silica-coated upconversion lanthanide nanoparticles: The effect of crystal design on morphology, structure and optical properties |
| title_sort | silica coated upconversion lanthanide nanoparticles the effect of crystal design on morphology structure and optical properties |
| topic | lanthanide nanoparticles oleylamine silica upconversion |
| url | https://doi.org/10.3762/bjnano.6.235 |
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