Order-Disorder Transition of Aragonite Nanoparticles in Nacre
نویسندگان
چکیده
منابع مشابه
Order-disorder transition of aragonite nanoparticles in nacre.
Understanding nacre's bottom-up biomineralization mechanism, particularly, how individual aragonite platelets are formed, has long remained elusive due to its crystallographic peculiarity and structural complexity. Here we report that crystallographic order-disorder transition can be triggered within individual aragonite platelets in pristine nacre by means of heat treatment and/or inelastic de...
متن کاملAmorphous layer around aragonite platelets in nacre.
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 ph...
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Nacre has recently attracted the attention of the research community. This biocomposite has exceptional strength and toughness with respect the materials it is made of. The design of nano and micro composite inspired from nacre requires a deep understanding of nacre microstructure and mechanical properties. In this work, the elastic properties of aragonite tablets in nacre were determined using...
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Nacre, commonly known as mother-of-pearl, is a remarkable biomineral that in red abalone consists of layers of 400-nm thick aragonite crystalline tablets confined by organic matrix sheets, with the (001) crystal axes of the aragonite tablets oriented to within ±12 from the normal to the layer planes. Recent experiments demonstrate that this orientational order develops over a distance of tens o...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2012
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.109.025501