Abstract
We devised a new process for fabricating an artificial nacreous structure on a natural nacre substrate. A film of alternating layers of natural nacre-like aragonite (CaCO3) and poly(acrylic acid) (PAA) was fabricated directly on an aragonitic nacre substrate from a solution at room temperature. Alternate repetition of aragonite growth in a CaCl2 solution and PAA drop coating gave a multilayer inorganic/organic nanocomposite film of alternating aragonite nanostacks and porous PAA. The microstructure and nanostructure of the film were characterized by field-emission scanning electron microscopy. The degree of orientation of deposited aragonite was determined by examination of fabricated aragonite-type strontianite (SrCO3) nanostacks. Analysis by X-ray diffractometry shows that the crystallographic c axis of the nanostacks is oriented perpendicular to the substrate surface. Analysis by transmission electron microscopy selected-area electron diffractometry shows that the a and b axes of the strontianite nanos...
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