iNANO and Department of Chemistry, Aarhus University, 14 Gustav Wieds Vej, Aarhus 8000, Denmark.
J R Soc Interface. 2013 Jun 26;10(86):20130319. doi: 10.1098/rsif.2013.0319. Print 2013 Sep 6.
Biological materials display complicated three-dimensional hierarchical structures. Determining these structures is essential in understanding the link between material design and properties. Herein, we show how diffraction tomography can be used to determine the relative placement of the calcium carbonate polymorphs calcite and aragonite in the highly mineralized holdfast system of the bivalve Anomia simplex. In addition to high fidelity and non-destructive mapping of polymorphs, we use detailed analysis of X-ray diffraction peak positions in reconstructed powder diffraction data to determine the local degree of Mg substitution in the calcite phase. These data show how diffraction tomography can provide detailed multi-length scale information on complex materials in general and of biomineralized tissues in particular.
生物材料呈现出复杂的三维层次结构。确定这些结构对于理解材料设计与性能之间的联系至关重要。本文展示了如何利用衍射层析成像来确定双壳类动物 Anomia simplex 高度矿化固着器系统中碳酸钙多晶型体方解石和文石的相对位置。除了对方解石和文石的高保真度和非破坏性成像外，我们还利用重建粉末衍射数据中 X 射线衍射峰位置的详细分析来确定方解石相中 Mg 取代的局部程度。这些数据表明，衍射层析成像如何能够为复杂材料（特别是生物矿化组织）提供详细的多长度尺度信息。
