A microstructural study of individual nacre tablet of Pinctada maxima

文献类型: 外文期刊

第一作者: Wang, Sheng-Nan

作者: Wang, Sheng-Nan;Yan, Xiao-Hui;Wang, Xiao-Xiang;Wang, Rizhi;Yu, Da-Hui

作者机构:

关键词: Nacre;Microstructure;Biomineral;Aragonite crystal

期刊名称:JOURNAL OF STRUCTURAL BIOLOGY ( 影响因子:2.867; 五年影响因子:4.474 )

ISSN:

年卷期:

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收录情况: SCI

摘要: Nacre tablets from the shell of Pinctada maxima were studied with SEM, TEM and STEM. The systematic nanolath morphology on the (001) surface of nacre tablets was observed after acidic etching and mechanical polishing. The nanolaths were along the [100] crystallographic orientation of aragonite crystal. The (010) and (100) cross section surfaces of the nacre tablets showed nanolath and nanograin morphologies, respectively, which was consistent with [100] crystallographic orientation of nanolath on the (001) surface. Sheet-like defects with low mass density were observed on the (001) plane inside nacre tablets and were considered to be the cause of nanolath morphology revealed on the surfaces by acidic etching and mechanical polishing. On the other hand, large block [110] twins that divide the nacre tablets into two sectors were identified. The implication of these twins on the understanding to the crystallization mechanism of nacre tablets was discussed. (C) 2013 Elsevier Inc. All rights reserved.

分类号: Q13

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