MXenes ✖ Mendelssohn

Background reading music curated for this article is available at the bottom. Click to enjoy

wearable health sensors

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Picture yourself using a paper-thin device which will continually keep track of your heart rate, respiration, or muscular activities without ever making you uncomfortable. You wouldn’t even realize its presence on your body. It is this kind of technology where the wearable health sensors necessitate the use of materials which are very light and flexible, as well as highly conductive. 

This is what most conventional metals seem to find it difficult to combine at once. The need for such materials has resulted in scientists turning their attention to MXenes, a class of two-dimensional transition metal carbides and nitrides. 

MXene's layer structure

Due to their atomically thin nature as well as high conductivity, mechanical flexibility, and surface chemistry, MXenes have quickly become one of the most exciting nanomaterials in today’s material science.

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MXenes can be made via the top-down synthesis method, which starts with a layered material called the MAX phase. 

312 MAX Phase

It is formed in high temperature environments through the reaction of transition metals, either carbon or nitrogen, and the A group element, of aluminum. The aluminum layer is stripped off through chemical etching, usually by a combination of lithium fluoride (LiF) and hydrochloric acid (HCl). The remaining layered material is the transition metal carbides or nitrides. Layers are peeled apart in ultrathin sheets through intercalation agents and sonication. 

sonication peeling

In the process of etching, oxygen-containing, hydroxyl-containing, and fluoride-containing functional groups get attached to the surface. The final material called MXene.

Application

The special structure of MXenes is what makes it possible for this material to solve issues in various technology industries. In the health industry, there have been efforts made to use MXenes to develop biosensors that can be used to detect physiological parameters of wearable medical devices continuously. In the energy industry, there is research going on about how this material can be used to make electrode materials for faster battery charging and more energy storing capacity. 

MXene in batteries

There is also ongoing research on the development of MXene membrane to be used in the removal of heavy metals and organic pollutants from wastewater. In addition, the conductive films of this material are good candidates for shielding against electromagnetic interference.

I would recommend Felix Mendelssohn's Violin Concerto in E minor, Op. 64.

Felix Mendelssohn's Violin Concerto in E minor, Op. 64.

8:38

The delicate yet powerful sound of the violin reflects the nature of MXenes: atomically thin but highly functional. The dynamic interaction between the solo violin and orchestra represents MXenes’ layered structure and tunable properties, where small structural changes create diverse functions. The concerto’s balance between elegance and strength mirrors MXenes’ combination of flexibility, conductivity, and versatility.