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Polymorph Switching of Calcium Carbonate Crystals by Polymer-Controlled Crystallization

Polymorph Switching of Calcium Carbonate Crystals by Polymer-Controlled Crystallization

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XU, An-Wu, Wen-Fei DONG, Markus ANTONIETTI, Helmut CÖLFEN, 2008. Polymorph Switching of Calcium Carbonate Crystals by Polymer-Controlled Crystallization. In: Advanced Functional Materials. 18(8), pp. 1307-1313. ISSN 1616-301X. eISSN 1616-3028. Available under: doi: 10.1002/adfm.200700895

@article{Xu2008-04-25Polym-40142, title={Polymorph Switching of Calcium Carbonate Crystals by Polymer-Controlled Crystallization}, year={2008}, doi={10.1002/adfm.200700895}, number={8}, volume={18}, issn={1616-301X}, journal={Advanced Functional Materials}, pages={1307--1313}, author={Xu, An-Wu and Dong, Wen-Fei and Antonietti, Markus and Cölfen, Helmut} }

Polymer-controlled crystallization of calcium carbonate crystals in solution by a gas diffusion method has been carried out in the presence of poly(sodium 4-styrene sulfonate-co-N-isopropylacrylamide) (PSS-co-PNIPAAM), and for the first time all three anhydrous polymorphs, calcite, vaterite, and aragonite could be selectively produced with a single additive. The selective polymorph synthesis can be nicely adjusted simply by concentration variations of polymer and calcium ions in the present reaction system. The simplicity of the system reveals the influence of Ca<sup>2+</sup> and polymer concentration on the nucleation and crystal growth of CaCO<sub>3</sub> via the balance between thermodynamic and kinetic reaction control. A single mechanistic framework employing particle mediated as well as ion mediated crystallization for polymorph control is proposed. Cölfen, Helmut Antonietti, Markus eng Xu, An-Wu 2017-09-21T09:22:09Z Dong, Wen-Fei 2017-09-21T09:22:09Z Cölfen, Helmut Polymorph Switching of Calcium Carbonate Crystals by Polymer-Controlled Crystallization Xu, An-Wu 2008-04-25 Antonietti, Markus Dong, Wen-Fei

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