Imaging chemical concentration pattern and early stages of spinodal decomposition in the AgxNa1−xBr system by scanning force microscopy
In quasi binary systems like AgBr–NaBr the demixing from the homogeneous high temperature phase into separated phases is a complex process that depends on the ageing temperature as well as on the quench rate. Spinodal decomposition and nucleation processes can be distinguished which lead, however, t...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/2/10/105013 |
| _version_ | 1827869620119273472 |
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| author | F Güthoff B Zhang G Eckold |
| author_facet | F Güthoff B Zhang G Eckold |
| author_sort | F Güthoff |
| collection | DOAJ |
| description | In quasi binary systems like AgBr–NaBr the demixing from the homogeneous high temperature phase into separated phases is a complex process that depends on the ageing temperature as well as on the quench rate. Spinodal decomposition and nucleation processes can be distinguished which lead, however, to the same final equilibrium state. Using frequency modulated scanning force microscopy we aimed to distinguish the demixed phases and their morphologies on a nm-scale at room temperature for samples with different concentration. While no contrast between the different phases are observed in the usual topographic mode, a modified evaluation of Kelvin experiments allows the distinction of silver- and sodium enriched phases. Moreover, direct evidence is found for concentration fluctuations which are characteristic for spinodal decomposition. |
| first_indexed | 2024-03-12T15:47:40Z |
| format | Article |
| id | doaj.art-1b398aa6cc9c4824b796cc4da1a59958 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:47:40Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-1b398aa6cc9c4824b796cc4da1a599582023-08-09T15:20:54ZengIOP PublishingMaterials Research Express2053-15912015-01-0121010501310.1088/2053-1591/2/10/105013Imaging chemical concentration pattern and early stages of spinodal decomposition in the AgxNa1−xBr system by scanning force microscopyF Güthoff0B Zhang1G Eckold2Institut f. Phys. Chemie, Georg-August-Universität Göttingen , D-37077 Göttingen, GermanyForschungszentrum Jülich, Institute of Complex Systems (ICS-1), D-52425 Jülich, GermanyInstitut f. Phys. Chemie, Georg-August-Universität Göttingen , D-37077 Göttingen, GermanyIn quasi binary systems like AgBr–NaBr the demixing from the homogeneous high temperature phase into separated phases is a complex process that depends on the ageing temperature as well as on the quench rate. Spinodal decomposition and nucleation processes can be distinguished which lead, however, to the same final equilibrium state. Using frequency modulated scanning force microscopy we aimed to distinguish the demixed phases and their morphologies on a nm-scale at room temperature for samples with different concentration. While no contrast between the different phases are observed in the usual topographic mode, a modified evaluation of Kelvin experiments allows the distinction of silver- and sodium enriched phases. Moreover, direct evidence is found for concentration fluctuations which are characteristic for spinodal decomposition.https://doi.org/10.1088/2053-1591/2/10/105013scanning force microscopyKelvin probespinodal decompositionmixed halides |
| spellingShingle | F Güthoff B Zhang G Eckold Imaging chemical concentration pattern and early stages of spinodal decomposition in the AgxNa1−xBr system by scanning force microscopy Materials Research Express scanning force microscopy Kelvin probe spinodal decomposition mixed halides |
| title | Imaging chemical concentration pattern and early stages of spinodal decomposition in the AgxNa1−xBr system by scanning force microscopy |
| title_full | Imaging chemical concentration pattern and early stages of spinodal decomposition in the AgxNa1−xBr system by scanning force microscopy |
| title_fullStr | Imaging chemical concentration pattern and early stages of spinodal decomposition in the AgxNa1−xBr system by scanning force microscopy |
| title_full_unstemmed | Imaging chemical concentration pattern and early stages of spinodal decomposition in the AgxNa1−xBr system by scanning force microscopy |
| title_short | Imaging chemical concentration pattern and early stages of spinodal decomposition in the AgxNa1−xBr system by scanning force microscopy |
| title_sort | imaging chemical concentration pattern and early stages of spinodal decomposition in the agxna1 xbr system by scanning force microscopy |
| topic | scanning force microscopy Kelvin probe spinodal decomposition mixed halides |
| url | https://doi.org/10.1088/2053-1591/2/10/105013 |
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