2D magnetic MOFs with micron-lateral size by liquid exfoliation

Abstract

<p>Herein, we obtained high-quality nanosheets for a whole family of Fe-based magnetic MOFs, <bold>MUV-1-X</bold>, through a liquid exfoliation procedure.</p>

A Multifunctional Dysprosium‐Carboxylato 2D Metall–Organic Framework

“…Exfoliation of the bulk 2D MOF material into nanosheets is an important step for the use of these nanoobjects in devices or materials,and the most relevant techniques are reviewed in several papers. [22][23][24] For2 DM OFs formed of neutral VdW stacked nanosheets exfoliation by sonication in al iquid matrix should result in nanosheets stable towards aggregation, as observed for some 2D materials. [1,25] This last point is very relevant for further manipulation of the nanosheets,for surface deposition, or for the formation of multilayer heterostructures.…”

“…[40] Clearly stabilization of the nanosheets is one important challenge we face for the possible use of single layers of compound 1.Delamination or exfoliation conditions for aneutral 2D MOF have been reviewed by Coronado et al in ar ecent communication where the authors achieve regularly shaped flakes of large lateral size and thickness of 3-4 layers. [24] Atomic Force Microscopy images (AFM) can be obtained from drop casted and spin coated dispersions of exfoliated nanosheets in various substrates.Figure 4shows AFM images of two single flakes on thermally oxidized silicon wafer spin coated at 500 rpm for 60 sa nd at 1000 rpm for 45 s. More images can be found in Supporting Information material Figure S8. We have used mica, HOPG and silicon wafers with thermal SiO 2 layers (Figure S8).…”

Luminescent and Magnetic Tb-MOF Flakes Deposited on Silicon

“…However, the isolation of high-quality flakes of 2D MOFs in large amounts that can be suitably deposited onto surfaces remains a challenge. The preparation of high-quality crystalline layers with lateral sizes of 8 μm and thicknesses of 4 nm of a whole family of Fe-based magnetic MOFs, through a liquid exfoliation procedure was recently presented by Coronado et al [ 38 ].…”

Solvent-tuned ultrasonic synthesis of 2D coordination polymer nanostructures and flakes

“…For this, the selection of the solvent is important as suitable polarities will provide stable colloidal suspensions, while some solvents can also decompose or fragment the bulk material, without obtaining layers [26] . Therefore, specific studies have been devoted to determining the role of solvent and US along the delamination process of 2D-CPs [19] , [27] . However, there is still a lot of effort to be done given the incipient nature of the field.…”