1 research outputs found
Understanding the Electron Beam Resilience of Two-Dimensional Conjugated Metal–Organic Frameworks
Knowledge of the
atomic structure of layer-stacked two-dimensional
conjugated metal–organic frameworks (2D c-MOFs) is an essential
prerequisite for establishing their structure–property correlation.
For this, atomic resolution imaging is often the method of choice.
In this paper, we gain a better understanding of the main properties
contributing to the electron beam resilience and the achievable resolution
in the high-resolution TEM images of 2D c-MOFs, which include chemical
composition, density, and conductivity of the c-MOF structures. As
a result, sub-angstrom resolution of 0.95 Ã… has been achieved
for the most stable 2D c-MOF of the considered structures, Cu3(BHT) (BHT = benzenehexathiol), at an accelerating voltage
of 80 kV in a spherical and chromatic aberration-corrected TEM. Complex
damage mechanisms induced in Cu3(BHT) by the elastic interactions
with the e-beam have been explained using detailed ab initio molecular dynamics calculations. Experimental and calculated knock-on
damage thresholds are in good agreement