材料科学
纳米技术
自组装
纳米尺度
韧性
制作
金属
层级组织
复合材料
医学
病理
经济
管理
冶金
替代医学
作者
Franziska Jehle,Peter Fratzl,Matthew J. Harrington
出处
期刊:ACS Nano
[American Chemical Society]
日期:2018-01-31
卷期号:12 (3): 2160-2168
被引量:49
标识
DOI:10.1021/acsnano.7b07905
摘要
Bottom-up control over structural hierarchy from the nanoscale through the macroscale is a critical aspect of biological materials fabrication and function, which can inspire production of advanced materials. Mussel byssal threads are a prime example of protein-based biofibers in which hierarchical organization of protein building blocks coupled via metal complexation leads to notable mechanical behaviors, such as high toughness and self-healing. Using a natural amino acid sequence from byssal thread proteins, which functions as a pH-triggered self-assembly point, we created free-standing peptide films with complex hierarchical organization across multiple length scales that can be controlled by inclusion of metal ions (Zn2+ and Cu2+) during the assembly process. Additionally, analysis of film mechanical performance indicates that metal coordination bestows up to an order of magnitude increase in material stiffness, providing a paradigm for creating tunable polymeric materials with multiscale organizational structure.
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