Hybrid Nanosheets of an Inorganic–Organic Framework Material: Facile Synthesis, Structure, and Elastic Properties

Paper by Jin-Chong Tan, Paul J. Saines, Erica G. Bithell and Anthony K. Cheetham in ACS Nano, doi: 10.1021/nn204054k

Published January 2012

A new 2-D inorganic–organic framework material is reported, MnDMS [Mn 2,2-dimethylsuccinate], featuring weakly bound hybrid layers in its bulk crystals that can be readily exfoliated into nanosheets via ultrasonication. The fully exfoliated hybrid nanosheets correspond to a unilamellar thickness of about 1 nm, while the partially exfoliated nanosheets (multilayer films) exhibit a typical thickness on the order of 10 nm. Atomic force microscopy was used to characterize the surface topography and to map the variation of nanomechanical properties across the surface of the delaminated nanosheets. The morphology and crystallographic orientation of the exfoliated layers were further studied by transmission electron microscopy. Additionally, the elastic anisotropy underlying the bulk host material was investigated by means of single-crystal nanoindentation, from which the critical resolved shear stress needed for the micromechanical delamination of individual layers was determined to be relatively small (0.4 GPa).

Adapted with permission from ACS Nano, 2012, 6 (1), pp 615–621. Copyright 2012 American Chemical Society.

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