Electro-thermal poling in bioactive sodium‑calcium phosphate-silicate glass: Anodic near-surface network connectivity changes and second harmonic generation
We report Raman spectra in the sub-anodic region after electro-thermal poling of the 46S4 bioglass and show a correlation between structural changes and the induced second harmonic generation (SHG). The Raman peak at ca. 625 cm−1, due to the symmetric stretching-bending vibration of Si-O-Si bridges,...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Journal of Non-Crystalline Solids: X |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S259015912300016X |
| _version_ | 1797868217119539200 |
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| author | D. Palles M. Dussauze C.R. Mariappan V. Rodriguez B. Roling E.I. Kamitsos |
| author_facet | D. Palles M. Dussauze C.R. Mariappan V. Rodriguez B. Roling E.I. Kamitsos |
| author_sort | D. Palles |
| collection | DOAJ |
| description | We report Raman spectra in the sub-anodic region after electro-thermal poling of the 46S4 bioglass and show a correlation between structural changes and the induced second harmonic generation (SHG). The Raman peak at ca. 625 cm−1, due to the symmetric stretching-bending vibration of Si-O-Si bridges, was employed to quantify the poling-induced structural changes since its frequency νs(Si-O-Si) varies linearly with the silicate network connectivity, NC. Key results include the increase of network connectivity towards the anode after poling, with NC varying from 2.24 before poling to 2.37 at the anode after poling. SHG measurements showed the presence of an optically-inactive layer of 1.0 μm thick below the anode, followed by an optically-active layer where the SHG signal is maximized from about 1.5 to 4.0 μm. In this layer the NC takes intermediate values and reflects modest changes with respect to the pristine bioglass. The present findings suggest that the transport of electrons near the metal film anode is faster than the Na ion transport towards the cathode. |
| first_indexed | 2024-04-09T23:53:34Z |
| format | Article |
| id | doaj.art-7c5ee951f15045abb53a146131789a5b |
| institution | Directory Open Access Journal |
| issn | 2590-1591 |
| language | English |
| last_indexed | 2024-04-09T23:53:34Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Non-Crystalline Solids: X |
| spelling | doaj.art-7c5ee951f15045abb53a146131789a5b2023-03-17T04:34:36ZengElsevierJournal of Non-Crystalline Solids: X2590-15912023-03-0117100164Electro-thermal poling in bioactive sodium‑calcium phosphate-silicate glass: Anodic near-surface network connectivity changes and second harmonic generationD. Palles0M. Dussauze1C.R. Mariappan2V. Rodriguez3B. Roling4E.I. Kamitsos5Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., Athens 11635, GreeceInstitut des Sciences Moleculaires - UMR 5255 CNRS, Université Bordeaux, Talence Cedex, FranceDepartment of Chemistry, University of Marburg, Hans-Meerwein-Strasse 4, Marburg 35032, GermanyInstitut des Sciences Moleculaires - UMR 5255 CNRS, Université Bordeaux, Talence Cedex, FranceDepartment of Chemistry, University of Marburg, Hans-Meerwein-Strasse 4, Marburg 35032, GermanyTheoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., Athens 11635, Greece; Corresponding author.We report Raman spectra in the sub-anodic region after electro-thermal poling of the 46S4 bioglass and show a correlation between structural changes and the induced second harmonic generation (SHG). The Raman peak at ca. 625 cm−1, due to the symmetric stretching-bending vibration of Si-O-Si bridges, was employed to quantify the poling-induced structural changes since its frequency νs(Si-O-Si) varies linearly with the silicate network connectivity, NC. Key results include the increase of network connectivity towards the anode after poling, with NC varying from 2.24 before poling to 2.37 at the anode after poling. SHG measurements showed the presence of an optically-inactive layer of 1.0 μm thick below the anode, followed by an optically-active layer where the SHG signal is maximized from about 1.5 to 4.0 μm. In this layer the NC takes intermediate values and reflects modest changes with respect to the pristine bioglass. The present findings suggest that the transport of electrons near the metal film anode is faster than the Na ion transport towards the cathode.http://www.sciencedirect.com/science/article/pii/S259015912300016XPhosphate-silicate bioglassesElectro-thermal polingRaman spectroscopySecond harmonic generationNetwork connectivity |
| spellingShingle | D. Palles M. Dussauze C.R. Mariappan V. Rodriguez B. Roling E.I. Kamitsos Electro-thermal poling in bioactive sodium‑calcium phosphate-silicate glass: Anodic near-surface network connectivity changes and second harmonic generation Journal of Non-Crystalline Solids: X Phosphate-silicate bioglasses Electro-thermal poling Raman spectroscopy Second harmonic generation Network connectivity |
| title | Electro-thermal poling in bioactive sodium‑calcium phosphate-silicate glass: Anodic near-surface network connectivity changes and second harmonic generation |
| title_full | Electro-thermal poling in bioactive sodium‑calcium phosphate-silicate glass: Anodic near-surface network connectivity changes and second harmonic generation |
| title_fullStr | Electro-thermal poling in bioactive sodium‑calcium phosphate-silicate glass: Anodic near-surface network connectivity changes and second harmonic generation |
| title_full_unstemmed | Electro-thermal poling in bioactive sodium‑calcium phosphate-silicate glass: Anodic near-surface network connectivity changes and second harmonic generation |
| title_short | Electro-thermal poling in bioactive sodium‑calcium phosphate-silicate glass: Anodic near-surface network connectivity changes and second harmonic generation |
| title_sort | electro thermal poling in bioactive sodium calcium phosphate silicate glass anodic near surface network connectivity changes and second harmonic generation |
| topic | Phosphate-silicate bioglasses Electro-thermal poling Raman spectroscopy Second harmonic generation Network connectivity |
| url | http://www.sciencedirect.com/science/article/pii/S259015912300016X |
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