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

ABSTRACT: 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₎ ≈ 3.6 × E₍₁₀₀₎, followed by extensive plastic flows. Likewise, the yield strengths are considerably different, in which Y₍₁₁₁₎ ≈ 2 × Y₍₁₀₀₎ because of the underlying framework anisotropy. We measu

SUBMITTER: Zeng Z 

PROVIDER: S-EPMC10073295 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature