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| Main Authors: | , , , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Faraday discussions
2025
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/40444727/ |
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Table of Contents:
- 3D Calcium carbonate polymorphs imaging with stimulated Raman scattering in biominerals. Dicko, Hamadou Vidal-Dupiol, Jéremie Saulnier, Denis Tambutté, Eric Venn, Alexander Tambutté, Sylvie Chamard, Virginie Duboisset, Julien Calcium Carbonate Spectrum Analysis, Raman Animals Anthozoa Pinctada Imaging, Three-Dimensional We present a highly sensitive coherent Raman microscopy approach, which allows for the tridimensional (3D) imaging of a series of carbonate polymorphs in marine organisms. CaCO biomineralization occurs from the transformation of metastable amorphous precursors and other crystalline phases into a final crystalline phase. Understanding biomineralization pathways requires identifying this physico-chemical temporal sequence. Our approach exploits the different vibrational signatures of amorphous calcium carbonate, aragonite, calcite, Mg-calcite or hemi-hydrated calcium carbonate. This optical method enables the production of spatially and spectrally resolved images of the different compounds. When applied on the growing edge of post-mortem samples of both pearl oyster shell and coral, it allows for inferring a temporal crystallisation sequence. We thus highlight the existence of intermediate crystalline phases, involving magnesian calcite or hemi-hydrated calcium carbonate, respectively.