Elucidating "screw dislocation"-driven film formation of sodium thiosulphate with complex hierarchical molecular assembly
Sodium thiosulphate (Na2S2O3) films were synthesized on carbon steel substrates through solution deposition, and a film formation growth mechanism is delineated in detail herein. Dislocation-driven film formation took place at the lower concentration of Na2S2O3 (0.1 M) studied, where screw dislocati...
| Main Authors: | , , , |
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| Format: | Journal Article |
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R S C Publications
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/56907 |
| _version_ | 1848759966827020288 |
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| author | Dwivedi, D. Lepkova, K. Becker, T. Rowles, Matthew |
| author_facet | Dwivedi, D. Lepkova, K. Becker, T. Rowles, Matthew |
| author_sort | Dwivedi, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Sodium thiosulphate (Na2S2O3) films were synthesized on carbon steel substrates through solution deposition, and a film formation growth mechanism is delineated in detail herein. Dislocation-driven film formation took place at the lower concentration of Na2S2O3 (0.1 M) studied, where screw dislocation loops were identified. Interestingly, we observed the co-existence of screw dislocation spiral loops and hierarchically-ordered molecular assembly in the film, and showed the importance of hierarchical morphology in the origin of screw dislocation. The screw dislocation loops were, however, distorted at the higher studied concentration of Na2S2O3 (0.5 M), and no hierarchical structures were formed. The mechanisms of film formation are discussed in detail and provide new insights into our understanding regarding morphology of the hierarchical molecular assembly, screw dislocation loop formation, and the role of chemical elements for their development. The main crystalline and amorphous phases in the surface films were identified as pyrite/mackinawite and magnetite. As sodium thiosulphate is widely used for energy, corrosion inhibition, nanoparticle synthesis and catalysis applications, the knowledge generated in this study is applicable to the fields of corrosion, materials science, materials chemistry and metallurgy. |
| first_indexed | 2025-11-14T10:08:17Z |
| format | Journal Article |
| id | curtin-20.500.11937-56907 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:08:17Z |
| publishDate | 2017 |
| publisher | R S C Publications |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-569072018-02-06T04:06:42Z Elucidating "screw dislocation"-driven film formation of sodium thiosulphate with complex hierarchical molecular assembly Dwivedi, D. Lepkova, K. Becker, T. Rowles, Matthew Sodium thiosulphate (Na2S2O3) films were synthesized on carbon steel substrates through solution deposition, and a film formation growth mechanism is delineated in detail herein. Dislocation-driven film formation took place at the lower concentration of Na2S2O3 (0.1 M) studied, where screw dislocation loops were identified. Interestingly, we observed the co-existence of screw dislocation spiral loops and hierarchically-ordered molecular assembly in the film, and showed the importance of hierarchical morphology in the origin of screw dislocation. The screw dislocation loops were, however, distorted at the higher studied concentration of Na2S2O3 (0.5 M), and no hierarchical structures were formed. The mechanisms of film formation are discussed in detail and provide new insights into our understanding regarding morphology of the hierarchical molecular assembly, screw dislocation loop formation, and the role of chemical elements for their development. The main crystalline and amorphous phases in the surface films were identified as pyrite/mackinawite and magnetite. As sodium thiosulphate is widely used for energy, corrosion inhibition, nanoparticle synthesis and catalysis applications, the knowledge generated in this study is applicable to the fields of corrosion, materials science, materials chemistry and metallurgy. 2017 Journal Article http://hdl.handle.net/20.500.11937/56907 10.1039/c7fd00092h R S C Publications restricted |
| spellingShingle | Dwivedi, D. Lepkova, K. Becker, T. Rowles, Matthew Elucidating "screw dislocation"-driven film formation of sodium thiosulphate with complex hierarchical molecular assembly |
| title | Elucidating "screw dislocation"-driven film formation of sodium thiosulphate with complex hierarchical molecular assembly |
| title_full | Elucidating "screw dislocation"-driven film formation of sodium thiosulphate with complex hierarchical molecular assembly |
| title_fullStr | Elucidating "screw dislocation"-driven film formation of sodium thiosulphate with complex hierarchical molecular assembly |
| title_full_unstemmed | Elucidating "screw dislocation"-driven film formation of sodium thiosulphate with complex hierarchical molecular assembly |
| title_short | Elucidating "screw dislocation"-driven film formation of sodium thiosulphate with complex hierarchical molecular assembly |
| title_sort | elucidating "screw dislocation"-driven film formation of sodium thiosulphate with complex hierarchical molecular assembly |
| url | http://hdl.handle.net/20.500.11937/56907 |