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DOI

The impressive mechanical properties of natural composites, such as nacre, arise from their multiscale hierarchical structures, which span from nano- to macroscale and lead to effective energy dissipation. While some synthetic bioinspired materials have achieved the toughness of natural nacre, current production methods are complex and typically involve toxic chemicals, extreme temperatures, and/or high pressures. Here, the exclusive use of bacteria to produce nacre-inspired layered calcium carbonate-polyglutamate composite materials that reach and exceed the toughness of natural nacre, while additionally exhibiting high extensibility and maintaining high stiffness, is introduced. The extensive diversity of bacterial metabolic abilities and the possibility of genetic engineering allows for the creation of a library of bacterially produced, cost-effective, and eco-friendly composite materials.

Original languageEnglish
Article number1805312
Number of pages6
JournalSmall
Volume15
Issue number22
Early online date2019
DOIs
Publication statusPublished - 29 May 2019

    Research areas

  • bacterially induced materials, biological materials, biomaterials, biomimetic materials, hierarchical materials, nanocomposites

ID: 53255001