Total morphosynthesis of biomimetic prismatic-type CaCO3 thin films

Chuanlian Xiao, Ming Li, Bingjun Wang, Ming-Feng Liu, Changyu Shao, Haihua Pan, Yong Lu, Bin-Bin Xu, Siwei Li, Da Zhan, Yuan Jiang (), Ruikang Tang (), Xiang Yang Liu and Helmut Cölfen ()
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Chuanlian Xiao: Xiamen University
Ming Li: Xiamen University
Bingjun Wang: Xiamen University
Ming-Feng Liu: Xiamen University
Changyu Shao: Zhejiang University
Haihua Pan: Zhejiang University
Yong Lu: Xiamen University
Bin-Bin Xu: Xiamen University
Siwei Li: Xiamen University
Da Zhan: Xiamen University
Yuan Jiang: Xiamen University
Ruikang Tang: Zhejiang University
Xiang Yang Liu: Xiamen University
Helmut Cölfen: University of Konstanz

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract Biomimetic mineralization can lead to advanced crystalline composites with common chemicals under ambient conditions. An exceptional example is biomimetic nacre with its superior fracture toughness. The synthesis of the prismatic layer with stiffness and wear resistance nonetheless remains an elusive goal. Herein, we apply a biomimetic mineralization method to grow prismatic-type CaCO3 thin films, mimicking their biogenic counterparts found in mollusk shells with a three-step pathway: coating a polymer substrate, deposition of a granular transition layer, and mineralization of a prismatic overlayer. The synthetic prismatic overlayers exhibit structural similarity and comparable hardness and Young’s modulus to their biogenic counterparts. Furthermore, employment of a biomacromolecular soluble additive, silk fibroin, in fabrication of the prismatic thin films leads to micro-/nano-textures with enhanced toughness and emerging under-water superoleophobicity. This study highlights the crucial role of the granular transition layer in promoting competition growth of the prismatic layer.

Date: 2017
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DOI: 10.1038/s41467-017-01719-6

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