材料科学
超分子化学
化学物理
纳米孔
氢键
执行机构
三肽
软质材料
机械能
微尺度化学
纳米结构
人工肌肉
纳米技术
Crystal(编程语言)
智能材料
化学工程
分子
晶体工程
超分子聚合物
自组装
结晶学
晶体结构
化学
热力学
计算机科学
有机化学
肽
人工智能
数学教育
功率(物理)
工程类
物理
生物化学
数学
程序设计语言
作者
Roxana Piotrowska,Travis Hesketh,Haozhen Wang,Alan D. Martin,Deborah Bowering,Chunqiu Zhang,Chunhua Hu,Scott A. McPhee,Tong Wang,Yaewon Park,Pulkit Singla,Thomas McGlone,Alastair J. Florence,Hans-Ulrich Reissig,Rein V. Ulijn,Xi Chen
出处
期刊:Nature Materials
[Springer Nature]
日期:2021-03-01
卷期号:20 (3): 403-409
被引量:23
标识
DOI:10.1038/s41563-020-0799-0
摘要
Water-responsive materials undergo reversible shape changes upon varying humidity levels. These mechanically robust yet flexible structures can exert substantial forces and hold promise as efficient actuators for energy harvesting, adaptive materials and soft robotics. Here we demonstrate that energy transfer during evaporation-induced actuation of nanoporous tripeptide crystals results from the strengthening of water hydrogen bonding that drives the contraction of the pores. The seamless integration of mobile and structurally bound water inside these pores with a supramolecular network that contains readily deformable aromatic domains translates dehydration-induced mechanical stresses through the crystal lattice, suggesting a general mechanism of efficient water-responsive actuation. The observed strengthening of water bonding complements the accepted understanding of capillary-force-induced reversible contraction for this class of materials. These minimalistic peptide crystals are much simpler in composition compared to natural water-responsive materials, and the insights provided here can be applied more generally for the design of high-energy molecular actuators.
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