Structure of semiconducting versus fast-ion conducting glasses in the Ag–Ge–Se system
The transition from a semiconductor to a fast-ion conductor with increasing silver content along the Agx(Ge0.25Se0.75)(100−x) tie line (0≤x≤25) was investigated on multiple length scales by employing a combination of electric force microscopy, X-ray diffraction, and neutron diffraction. The microsco...
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| Format: | Article |
| Language: | English |
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The Royal Society
2018-01-01
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| Series: | Royal Society Open Science |
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| Online Access: | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.171401 |
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| author | Anita Zeidler Philip S. Salmon Dean A. J. Whittaker Andrea Piarristeguy Annie Pradel Henry E. Fischer Chris J. Benmore Ozgur Gulbiten |
| author_facet | Anita Zeidler Philip S. Salmon Dean A. J. Whittaker Andrea Piarristeguy Annie Pradel Henry E. Fischer Chris J. Benmore Ozgur Gulbiten |
| author_sort | Anita Zeidler |
| collection | DOAJ |
| description | The transition from a semiconductor to a fast-ion conductor with increasing silver content along the Agx(Ge0.25Se0.75)(100−x) tie line (0≤x≤25) was investigated on multiple length scales by employing a combination of electric force microscopy, X-ray diffraction, and neutron diffraction. The microscopy results show separation into silver-rich and silver-poor phases, where the Ag-rich phase percolates at the onset of fast-ion conductivity. The method of neutron diffraction with Ag isotope substitution was applied to the x=5 and x=25 compositions, and the results indicate an evolution in structure of the Ag-rich phase with change of composition. The Ag–Se nearest-neighbours are distributed about a distance of 2.64(1) Å, and the Ag–Se coordination number increases from 2.6(3) at x=5 to 3.3(2) at x=25. For x=25, the measured Ag–Ag partial pair-distribution function gives 1.9(2) Ag–Ag nearest-neighbours at a distance of 3.02(2) Å. The results show breakage of Se–Se homopolar bonds as silver is added to the Ge0.25Se0.75 base glass, and the limit of glass-formation at x≃28 coincides with an elimination of these bonds. A model is proposed for tracking the breakage of Se–Se homopolar bonds as silver is added to the base glass. |
| first_indexed | 2024-12-13T15:53:26Z |
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| id | doaj.art-b6bcadf653b8425a9a8e65a7646b5121 |
| institution | Directory Open Access Journal |
| issn | 2054-5703 |
| language | English |
| last_indexed | 2024-12-13T15:53:26Z |
| publishDate | 2018-01-01 |
| publisher | The Royal Society |
| record_format | Article |
| series | Royal Society Open Science |
| spelling | doaj.art-b6bcadf653b8425a9a8e65a7646b51212022-12-21T23:39:23ZengThe Royal SocietyRoyal Society Open Science2054-57032018-01-015110.1098/rsos.171401171401Structure of semiconducting versus fast-ion conducting glasses in the Ag–Ge–Se systemAnita ZeidlerPhilip S. SalmonDean A. J. WhittakerAndrea PiarristeguyAnnie PradelHenry E. FischerChris J. BenmoreOzgur GulbitenThe transition from a semiconductor to a fast-ion conductor with increasing silver content along the Agx(Ge0.25Se0.75)(100−x) tie line (0≤x≤25) was investigated on multiple length scales by employing a combination of electric force microscopy, X-ray diffraction, and neutron diffraction. The microscopy results show separation into silver-rich and silver-poor phases, where the Ag-rich phase percolates at the onset of fast-ion conductivity. The method of neutron diffraction with Ag isotope substitution was applied to the x=5 and x=25 compositions, and the results indicate an evolution in structure of the Ag-rich phase with change of composition. The Ag–Se nearest-neighbours are distributed about a distance of 2.64(1) Å, and the Ag–Se coordination number increases from 2.6(3) at x=5 to 3.3(2) at x=25. For x=25, the measured Ag–Ag partial pair-distribution function gives 1.9(2) Ag–Ag nearest-neighbours at a distance of 3.02(2) Å. The results show breakage of Se–Se homopolar bonds as silver is added to the Ge0.25Se0.75 base glass, and the limit of glass-formation at x≃28 coincides with an elimination of these bonds. A model is proposed for tracking the breakage of Se–Se homopolar bonds as silver is added to the base glass.https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.171401glass structurephase separationsuper-ionic phasepercolation transitionelectric force microscopyneutron and x-ray diffraction |
| spellingShingle | Anita Zeidler Philip S. Salmon Dean A. J. Whittaker Andrea Piarristeguy Annie Pradel Henry E. Fischer Chris J. Benmore Ozgur Gulbiten Structure of semiconducting versus fast-ion conducting glasses in the Ag–Ge–Se system Royal Society Open Science glass structure phase separation super-ionic phase percolation transition electric force microscopy neutron and x-ray diffraction |
| title | Structure of semiconducting versus fast-ion conducting glasses in the Ag–Ge–Se system |
| title_full | Structure of semiconducting versus fast-ion conducting glasses in the Ag–Ge–Se system |
| title_fullStr | Structure of semiconducting versus fast-ion conducting glasses in the Ag–Ge–Se system |
| title_full_unstemmed | Structure of semiconducting versus fast-ion conducting glasses in the Ag–Ge–Se system |
| title_short | Structure of semiconducting versus fast-ion conducting glasses in the Ag–Ge–Se system |
| title_sort | structure of semiconducting versus fast ion conducting glasses in the ag ge se system |
| topic | glass structure phase separation super-ionic phase percolation transition electric force microscopy neutron and x-ray diffraction |
| url | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.171401 |
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