Correlation of the orientation of stacked aragonite platelets in nacre and their connection via mineral bridges

Ultramicroscopy
Katharina GriesAndreas Rosenauer

Abstract

In this work, we studied the correlation of the orientation of stacked aragonite platelets of Haliotis laevigata nacre, using selected area diffraction (SAD) in transmission electron microscopy (TEM). From the position of the center of Laue circle (COLC) within the diffraction patterns the tilt angles of the investigated platelets relatively to a reference platelet (oriented in zone axis) are determined. The strong correlation of the platelets supports the existence of mineral bridges, which connect the stacked platelets and enable a transfer of the platelet orientation during growth. Electron tomography and subsequent reconstruction of the obtained data yield information about the shape of the mineral bridges. The crystalline structure of the material within the mineral bridges was investigated by high resolution TEM (HRTEM).

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Citations

Mar 26, 2013·Micron : the International Research and Review Journal for Microscopy·Vesna SrotPeter A van Aken
Oct 15, 2013·Journal of Structural Biology·Ian C OlsonPupa U P A Gilbert
Dec 21, 2010·Biophysical Chemistry·Fabian HeinemannMonika Fritz
Jul 26, 2015·Seminars in Cell & Developmental Biology·Fabio Nudelman
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Apr 11, 2014·ACS Nano·Ulrich TritschlerHelmut Cölfen
Aug 12, 2009·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Takeshi FuruhashiAnton Beran

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