Gradual Ordering in Red Abalone Nacre
نویسندگان
چکیده
منابع مشابه
Gradual ordering in red abalone nacre.
Red abalone (Haliotis rufescens) nacre is a layered composite biomineral that contains crystalline aragonite tablets confined by organic layers. Nacre is intensely studied because its biologically controlled microarchitecture gives rise to remarkable strength and toughness, but the mechanisms leading to its formation are not well understood. Here we present synchrotron spectromicroscopy experim...
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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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The process of mineral formation following periods of growth interruption (growth bands) is described. Flat pearl implantation as well as a new trepanning method are used to observe the transitory phases of calcium carbonate which nucleate and grow during this process. An initial random nucleation of the aragonite polymorph is observed followed by a transition towards spherulitic growth. During...
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The contributions of mesolayers, organic interlamellar layers and nanoasperities/mineral bridges to the strength of nacre from red abalone (Haliotis rufescens) shell nacre are investigated. Samples were demineralized and deproteinized to separate the organic and mineral components, respectively. Tensile tests were performed on both the isolated organic constituent and the isolated mineral. The ...
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Nacre from seashells, also known as mother-of-pearl, has attracted much attention for its remarkable mechanical properties despite the structural weaknesses of its components [1],[2]. In this article, in situ-tensile tests of dry and wet nacre dogbone specimens are presented. Optical microscopy and digital image correlation techniques were used to determine deformation and strain fields . While...
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ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 2008
ISSN: 0002-7863,1520-5126
DOI: 10.1021/ja8065495