Diatom Mediated Production of Fluorescent Flower Shaped Silver-Silica Nanohybrid
Fabrication of flower-like nanostructures are gaining attention because of their high surface/volume ratio and extensive adsorption capacity. In the present investigation, flower-shaped, autofluorescent silver-silica (Ag-SiO<sub>2</sub>) hybrid nanoparticles have been fabricated exploiti...
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| Format: | Article |
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MDPI AG
2021-11-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/23/7284 |
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| author | Piya Roychoudhury Aleksandra Golubeva Przemysław Dąbek Michał Gloc Renata Dobrucka Krzysztof Kurzydłowski Andrzej Witkowski |
| author_facet | Piya Roychoudhury Aleksandra Golubeva Przemysław Dąbek Michał Gloc Renata Dobrucka Krzysztof Kurzydłowski Andrzej Witkowski |
| author_sort | Piya Roychoudhury |
| collection | DOAJ |
| description | Fabrication of flower-like nanostructures are gaining attention because of their high surface/volume ratio and extensive adsorption capacity. In the present investigation, flower-shaped, autofluorescent silver-silica (Ag-SiO<sub>2</sub>) hybrid nanoparticles have been fabricated exploiting diatoms as a source of nanosilica. Two different species of <i>Gedaniella</i> including <i>G. flavovirens</i> and <i>G. mutabilis</i> showed their efficacy in synthesizing fluorescent Ag-SiO<sub>2</sub> nanoflowers (NFs) and nanospheres (NSs) against 9 mM silver nitrate solution, respectively. The biogenic nanoconjugate (Ag-SiO<sub>2</sub>) was characterized by Uv-vis spectroscopy, energy dispersive X-ray spectroscopy (EDS), scanning (SEM) and transmission (TEM) electron microscopy. Production of Ag-SiO<sub>2</sub> hybrid nanoparticle was confirmed by observing both Ag and Si signals from a single nanoparticle in an EDS study. The broad and single absorption band at ~420 nm in Uv-vis spectroscopy confirmed proper miscibility and production of hybrid nanoparticles. The Ag-SiO<sub>2</sub> nanohybrids revealed autofluorescent property under the blue light region (excitation ~450–490 nm). SEM images of particles synthesized by <i>G. flavovirens</i> revealed the production of microscopic flower shaped Ag-SiO<sub>2</sub> particles with several layers of petals. A TEM study confirmed that the synthesized Ag-SiO<sub>2</sub> NFs are variable in size with 100–500 nm in diameter. Decolorization of methylene blue after exposure to Ag-SiO<sub>2</sub> particles confirmed catalytic activity of synthesized nanostructures. This eco-friendly method provides a new dimension in nanobiotechnology for biogenesis of such hierarchical nanostructure in a cost-effective way. |
| first_indexed | 2024-03-10T04:49:05Z |
| format | Article |
| id | doaj.art-29a4d77598dd42d1a71498fc6f2b6904 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T04:49:05Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-29a4d77598dd42d1a71498fc6f2b69042023-11-23T02:41:08ZengMDPI AGMaterials1996-19442021-11-011423728410.3390/ma14237284Diatom Mediated Production of Fluorescent Flower Shaped Silver-Silica NanohybridPiya Roychoudhury0Aleksandra Golubeva1Przemysław Dąbek2Michał Gloc3Renata Dobrucka4Krzysztof Kurzydłowski5Andrzej Witkowski6Institute of Marine and Environmental Sciences, University of Szczecin, Mickiewicza 16a, 70-383 Szczecin, PolandInstitute of Marine and Environmental Sciences, University of Szczecin, Mickiewicza 16a, 70-383 Szczecin, PolandInstitute of Marine and Environmental Sciences, University of Szczecin, Mickiewicza 16a, 70-383 Szczecin, PolandFaculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, PolandFaculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, PolandFaculty of Mechanical Engineering, Białystok University of Technology, Wiejska 45c, 15-351 Białystok, PolandInstitute of Marine and Environmental Sciences, University of Szczecin, Mickiewicza 16a, 70-383 Szczecin, PolandFabrication of flower-like nanostructures are gaining attention because of their high surface/volume ratio and extensive adsorption capacity. In the present investigation, flower-shaped, autofluorescent silver-silica (Ag-SiO<sub>2</sub>) hybrid nanoparticles have been fabricated exploiting diatoms as a source of nanosilica. Two different species of <i>Gedaniella</i> including <i>G. flavovirens</i> and <i>G. mutabilis</i> showed their efficacy in synthesizing fluorescent Ag-SiO<sub>2</sub> nanoflowers (NFs) and nanospheres (NSs) against 9 mM silver nitrate solution, respectively. The biogenic nanoconjugate (Ag-SiO<sub>2</sub>) was characterized by Uv-vis spectroscopy, energy dispersive X-ray spectroscopy (EDS), scanning (SEM) and transmission (TEM) electron microscopy. Production of Ag-SiO<sub>2</sub> hybrid nanoparticle was confirmed by observing both Ag and Si signals from a single nanoparticle in an EDS study. The broad and single absorption band at ~420 nm in Uv-vis spectroscopy confirmed proper miscibility and production of hybrid nanoparticles. The Ag-SiO<sub>2</sub> nanohybrids revealed autofluorescent property under the blue light region (excitation ~450–490 nm). SEM images of particles synthesized by <i>G. flavovirens</i> revealed the production of microscopic flower shaped Ag-SiO<sub>2</sub> particles with several layers of petals. A TEM study confirmed that the synthesized Ag-SiO<sub>2</sub> NFs are variable in size with 100–500 nm in diameter. Decolorization of methylene blue after exposure to Ag-SiO<sub>2</sub> particles confirmed catalytic activity of synthesized nanostructures. This eco-friendly method provides a new dimension in nanobiotechnology for biogenesis of such hierarchical nanostructure in a cost-effective way.https://www.mdpi.com/1996-1944/14/23/7284diatomsilver-silicananohybridnanoflowerfluorescent particles |
| spellingShingle | Piya Roychoudhury Aleksandra Golubeva Przemysław Dąbek Michał Gloc Renata Dobrucka Krzysztof Kurzydłowski Andrzej Witkowski Diatom Mediated Production of Fluorescent Flower Shaped Silver-Silica Nanohybrid Materials diatom silver-silica nanohybrid nanoflower fluorescent particles |
| title | Diatom Mediated Production of Fluorescent Flower Shaped Silver-Silica Nanohybrid |
| title_full | Diatom Mediated Production of Fluorescent Flower Shaped Silver-Silica Nanohybrid |
| title_fullStr | Diatom Mediated Production of Fluorescent Flower Shaped Silver-Silica Nanohybrid |
| title_full_unstemmed | Diatom Mediated Production of Fluorescent Flower Shaped Silver-Silica Nanohybrid |
| title_short | Diatom Mediated Production of Fluorescent Flower Shaped Silver-Silica Nanohybrid |
| title_sort | diatom mediated production of fluorescent flower shaped silver silica nanohybrid |
| topic | diatom silver-silica nanohybrid nanoflower fluorescent particles |
| url | https://www.mdpi.com/1996-1944/14/23/7284 |
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