The liquid-liquid interface (LLI) technique has been used to form thin films of various materials parallel to the interface. In this report, by taking CuS as an example, we show that CuS not only adopts thin film structures at the liquid-liquid interface parallel to the interface but can also utilize beyond the interface to form self-supported vertically aligned CuS thin films by controlling the precursor concentration. We also report the formation of a self-assembled monolayer of CuS nanoparticles in the dichlorobenzenewater interface at a lower concentration of copper. Thin films generated at LLI show p-type conductivity with a sheet resistance of ~350 Ω/& and transparency up to 72 % at 550 nm. CuS also show electrocatalytic activity towards glucose sensing with a sensitivity of 3958 μA mM À 1 cm À 2 , which is among the best in copper-based materials.
The cover image shows the formation mechanism of misfit calcium cobalt oxide nanotubes, part of Prof. Leela S. Panchakarla's work from when he was a post‐doc at the Weizmann Institute under Prof. Reshef Tenne. Prof. Panchakarla, a gifted materials chemist, contributed significantly to the field of layered materials. This special issue is dedicated to the memory of Prof. Leela S. Panchakarla, who passed away shortly after submitting his article to the Israel Journal of Chemistry (https://doi.org/10.1002/ijch.202100080).
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