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Creation of electrically conductive nanostructures using water and air

04.11.2021

Scientists from Japan have noticed unique reactions in the interaction of water, oil and air. They used them to create nanosheets, which are essential for next-generation sensors and power generation technologies.

Scientists have created microporous metal-organic frameworks (MOFs), which are composed of metal ions and organic binders. These materials formed three-dimensional nanostructures that conduct electricity. The researchers used the same conditions that are typical for the formation of an oil film on water.

In order to use the properties of MOFs in energy production and sensor technologies, scientists have changed the approach to creating these frameworks. The researchers applied a solution with organic linkers (building blocks or binders containing metal cations - Hi-Tech) to an aqueous solution of metal ions. After contact, the substances combined into a hexagonal structure. Nanostructures formed at the points of contact between liquid and air. The scientists compressed the nanosheets to give them a denser and more unbreakable structure.

The researchers tested the nanostructures using microscopic and X-ray crystallographic analysis. The densely ordered crystals indicated not only strong contact between the sheets, but also the electrical properties of the material. The researchers transferred the nanosheets to a silicon substrate, added gold electrodes, and measured the electrical conductivity.

Now scientists are studying how various parameters affect leaf morphology. Their goal is to develop a technique for creating high-quality nanosheets with desired electronic properties.

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While on a submarine, you breathe air that has already been in the lungs of about 120 other people. This is not as scary as it sounds, because submarines have ventilation systems that clean the air of carbon dioxide using a chemical.

Currently, liquid amines, organic compounds based on ammonia, are used as substances used to remove CO2 from the air. Amines are extremely toxic and have a characteristic repulsive odor familiar to every diver.

The innovative nanomaterial SAMMS, developed by the Pacific Northwest National Laboratory (USA), is a finely porous sand containing molecules that absorb CO2 from the air. Its structure allows even a small amount of material to absorb an incredible amount of CO2 - according to scientists, a teaspoon of SAMMS can absorb an amount of CO2 comparable to the volume of a football stadium.

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