Kim, Raehyun Kim, Chulki Lee, Sangsoo Kim, Junkyung Kim, Il Won 2024-01-20T20:31:24Z 2024-01-20T20:31:24Z 2021-09-05 2009-11 1528-7483 https://pubs.kist.re.kr/handle/201004/132000 The effect of poly(vinyl alcohol) (PVA) on the crystallization of calcium carbonate is reported. Crystallization was initiated by flowing a supersaturated solution over a single crystal of calcite, and in situ atomic force microscopy (AFM) was utilized to observe the crystal growth. When no additives were in the supersaturated solution, typical step growth at the screw dislocation hillocks of calcite proceeded. When poly(ethylene oxide), poly(N-vinyl pyrrolidone), and poly(N-isopropyl acrylamide) were added to the solution, a similar behavior was observed. However, with PVA, dramatic changes occurred in the crystal growth. PVA initially induced step roughening, followed by step bunching, which led to macrostep formation. More importantly, PVA promoted two-dimensional (213) nucleation and growth, which extensively affected the entire crystallization region. The change in growth mode, from step-flow initiating from dislocations to 2D island formation, originates from the PVA adsorption. The adsorbed PVA inhibits the advance of calcite steps and induces 2D island formation, together leading to a new surface morphology. The extensive 2D island formation with a macromolecular additive, but without a preorganized organic matrix, seems to be a technically attractive strategy to generate assembled microcrystals with occluded macromolecules, a structure well-known in biomineralization. English American Chemical Society CRYSTAL-GROWTH SHELL ARAGONITE PROTEIN NACRE NUCLEATION POLYMORPHS DESIGN In Situ Atomic Force Microscopy Study on the Crystallization of Calcium Carbonate Modulated by Poly(vinyl alcohol)s Article 10.1021/cg900721g 1 Crystal Growth & Design, v.9, no.11, pp.4584 - 4587 Crystal Growth & Design 9 11 4584 4587 scie scopus 000271272900002 2-s2.0-72949084573 Chemistry, Multidisciplinary Crystallography Materials Science, Multidisciplinary Chemistry Crystallography Materials Science Article CRYSTAL-GROWTH SHELL ARAGONITE PROTEIN NACRE NUCLEATION POLYMORPHS DESIGN biomineralization crystal growth control CaCO3 PVA in situ AFM