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Tuning the Stability of CaCO3 Crystals with Magnesium Ions for the Formation of Aragonite Thin Films on Organic Polymer Templates |
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| Authors: | Fangjie Zhu Dr. Tatsuya Nishimura Dr. Takeshi Sakamoto Dr. Hidekazu Tomono Dr. Hiroki Nada Prof. Dr. Yasushi Okumura Prof. Dr. Hirotsugu Kikuchi Prof. Dr. Takashi Kato |
| Affiliation: | 1. Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Bunkyo‐ku, Tokyo 113‐8656 (Japan), Fax: (+81)?3‐5841‐8661;2. National Institute of Advanced Industrial Science and Technology (AIST), Onogawa, Tsukuba 305‐8569 (Japan), Fax: (+81)?29‐861‐8722;3. Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga, Fukuoka 816‐8580 (Japan) |
| Abstract: | Thin‐film growth of aragonite CaCO3 on annealed poly(vinyl alcohol) (PVA) matrices is induced by adding Mg2+ into a supersaturated solution of CaCO3. Both the growth rate and surface morphology of the aragonite thin films depend upon the concentration of Mg2+ in the mineralization solution. In the absence of PVA matrices, no thin films are formed, despite the presence of Mg2+. Molecular dynamics simulation of the CaCO3 precursor suggests that the transition of amorphous calcium carbonate to crystals is suppressed in the presence of Mg2+. The role for ionic additives in the crystallization of CaCO3 on organic templates obtained in this study may provide useful information for the development of functional hybrid materials. |
| Keywords: | biomineralization calcium carbonate magnesium molecular dynamics organic– inorganic hybrid composites thin films |