title: Tuning the stability of CaCO3 crystals with magnesium ions for the formation of aragonite thin films on organic polymer templates.
abstract: Thin-film growth of aragonite CaCO3 on annealed poly(vinyl alcohol) (PVA) matrices is induced by adding Mg(2+) into a supersaturated solution of CaCO3. Both the growth rate and surface morphology of the aragonite thin films depend upon the concentration of Mg(2+) in the mineralization solution. In the absence of PVA matrices, no thin films are formed, despite the presence of Mg(2+). Molecular dynamics simulation of the CaCO3 precursor suggests that the transition of amorphous calcium carbonate to crystals is suppressed in the presence of Mg(2+). 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.
authors.affiliation: Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656 (Japan), Fax: (+81) 3-5841-8661.
authors.forename: Fangjie
authors.initials: F
authors.lastname: Zhu
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Nishimura
authors.forename: Takeshi
authors.initials: T
authors.lastname: Sakamoto
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Tomono
authors.forename: Hiroki
authors.initials: H
authors.lastname: Nada
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Okumura
authors.forename: Hirotsugu
authors.initials: H
authors.lastname: Kikuchi
authors.forename: Takashi
authors.initials: T
authors.lastname: Kato
mesh_terms: D002119:Calcium Carbonate / Q000138:chemical synthesis* / Q000737:chemistry*; D003460:Crystallization; D007477:Ions / Q000737:chemistry; D008274:Magnesium / Q000737:chemistry*; D010316:Particle Size; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D007477:Ions; D011142:Polyvinyl Alcohol; D002119:Calcium Carbonate; D008274:Magnesium
keywords: biomineralization; calcium carbonate; magnesium; molecular dynamics; organic-inorganic hybrid composites; thin films