About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
2D Materials – Preparation, Properties, Modeling & Applications
|
| Presentation Title |
Seed-Mediated Evolution of SnS₂–SnSe₂ Heterostructures: From Core–Shell to Hollow Architectures |
| Author(s) |
Lili Liu |
| On-Site Speaker (Planned) |
Lili Liu |
| Abstract Scope |
The formation pathway of SnS₂–SnSe₂ heterostructures was investigated using SnS₂ nanoplates as seeds under different reaction environments. In a benzyl alcohol system containing polyvinylpyrrolidone (PVP), controlled selenization preserved the seed morphology and produced SnS₂–SnSe₂ core–shell structures, suggesting that PVP stabilizes the SnS₂ surface and promotes heterogeneous growth of SnSe₂. In contrast, when the reaction was conducted in aqueous solution without PVP, the SnS₂ seeds gradually dissolved, leading to the formation of hollow SnSe₂ nanostructures. The morphological evolution indicates a Kirkendall effect rather than direct shell growth. These results reveal that solvent and ligand chemistry strongly influence the balance between seed preservation and dissolution, thereby directing the formation of either core–shell or hollow architectures. This study provides mechanistic insights into the synthesis of chalcogenide heterostructures and offers a strategy for tailoring nanostructure morphology and functionality. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Characterization, Composites |