Abstract
<TEX>$CaCO_3$</TEX> crystalline structures having novel assemblies were in situ fabricated as analogs of naturally occurring proteins and polysaccharides for biomineralization. The calcite crystal was mineralized in a poly(vinyl alcohol)-<TEX>$Ca^{2+}$</TEX> complex film immersed in a <TEX>$Na_2CO_3$</TEX> solution containing poly(aspartic acid). The morphology and size of the <TEX>$CaCO_3$</TEX> crystals were tuned by varying the concentration of poly(aspartic acid). The mechanisms of their nucleation orientation and formation were investigated experimentally and through molecular dynamics (MD) simulations in order to obtain a better understanding of the interactions between the polymers and the crystal at the molecular level. Both the MD results and experimental results indicate that the interaction between PVA and calcite mainly depends on the concentration of the polymer. The novel approach proposed herein for the fabrication of inorganic crystalline assembly structures can be used to fabricate precise crystalline structures.
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