About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bio-Nano Interfaces and Engineering Applications
|
| Presentation Title |
Phase Transformation of Amorphous Calcium Carbonate: Effects of Crystalline Substrates and Solution Chemistry |
| Author(s) |
Tsung-Yen Lee, Yen-Cheng Liu, Chang-Yu Sun |
| On-Site Speaker (Planned) |
Tsung-Yen Lee |
| Abstract Scope |
Amorphous calcium carbonate (ACC) serves as an important transient precursor phase in biomineralization. From calcitic echinoderms to aragonitic coral skeletons, ACC nanoparticles is found in diverse carbonate biominerals, and its crystallization pathway plays a crucial role in determining the structures and properties of biominerals. During the phase transition, two main factors are involved in controlling the resulting polymorphs: solution chemistry, which affects the solubility and surface stability, and the crystalline substrate, which provides potential templating for solid-solid transformation and epitaxial growth. Despite extensive studies, a systematic understanding of the intricate interplay between the two factors on ACC transformation remains obscure. In this study, ACC nanoparticles are synthesized and deposited on crystalline calcite and aragonite substrates before crystallization, and the Mg/Ca ratios of the solution are varied to investigate epitaxial transformation. Using microscopy, spectroscopy, and diffraction techniques, we aim to elucidate the mechanisms governing ACC-mediated crystallization pathways and polymorph control. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Thin Films and Interfaces, Other |