We reveal that the aragonite CaCO3 platelets in nacre of Haliotis laevigata are covered with a continuous layer of disordered amorphous CaCO3 and that there is no protein interaction with this layer. This finding contradicts classical paradigms of biomineralization, e.g., an epitaxial match between the structural organic matrix and the formed mineral. This finding also highlights the role of physicochemical effects in morphogenesis, complementing the previously assumed total control by biomolecules and bioprocesses, with many implications in nanotechnology and materials science.

中文翻译：

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珍珠质中文石片状晶体周围的无定形层。

我们揭示了无盐无水CaCO3的连续层覆盖了无盐无盐藻珍珠质中的文石CaCO3血小板，并且该层没有蛋白质相互作用。这一发现与生物矿化的经典范例相矛盾，例如，结构有机基质与形成的矿物之间的外延匹配。这一发现还强调了理化作用在形态发生中的作用，补充了先前假定的由生物分子和生物过程进行的全面控制，这在纳米技术和材料科学中具有许多意义。