4.6 Article

In situ micropillar compression of an anisotropic metal-organic framework single crystal

期刊

COMMUNICATIONS CHEMISTRY
卷 6, 期 1, 页码 -

出版社

NATURE PORTFOLIO
DOI: 10.1038/s42004-023-00858-w

关键词

-

向作者/读者索取更多资源

Understanding the mechanical behavior of MOF beyond their elastic limit is crucial for their practical applications. The study determined the stress-strain curves of a copper paddlewheel MOF (HKUST-1) along different crystallographic directions and revealed anisotropic elastic response and extensive plastic flows. The fracture toughness values of two facets were comparable, indicating the ductility of porous framework under compression and bonds breakage.
Understanding of the complex mechanical behavior of metal-organic frameworks (MOF) beyond their elastic limit will allow the design of real-world applications in chemical engineering, optoelectronics, energy conversion apparatus, and sensing devices. Through in situ compression of micropillars, the uniaxial stress-strain curves of a copper paddlewheel MOF (HKUST-1) were determined along two unique crystallographic directions, namely the (100) and (111) facets. We show strongly anisotropic elastic response where the ratio of the Young's moduli are E-(111) approximate to 3.6 x E-(100), followed by extensive plastic flows. Likewise, the yield strengths are considerably different, in which Y-(111) approximate to 2 x Y-(100) because of the underlying framework anisotropy. We measure the fracture toughness using micropillar splitting. While in situ tests revealed differential cracking behavior, the resultant toughness values of the two facets are comparable, yielding K-c similar to 0.5 MPa root m. This work provides insights of porous framework ductility at the micron scale under compression and failure by bonds breakage.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据