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Researchers take a closer look at a mysterious graphene oxide phenomenon

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A staff of researchers at UNSW has noticed a distinctive phenomenon in graphene oxide (GO). The oxygen atoms in GO are usually hooked up in a slightly chaotic method. At elevated temperatures, nonetheless, the oxygen atoms kind extra organized constructions – by themselves. This strategy of ‘self-organization’ was discovered to drastically enhance varied properties of GO – for instance, its electrical conductivity.

For years, researchers have been conscious that this phenomenon existed, however they might solely exhibit it utilizing computational simulations. The brand new analysis, led by Dr. Rakesh Joshi at UNSW, efficiently noticed it for the primary time in actual life, utilizing cutting-edge electron microscopy. Whereas frequent microscopes use mild to create a magnified picture, electron microscopes use electrons. With the sort of microscope, it’s doable to watch single atoms, by magnifying what you’re wanting at by a issue of 1,000,000.

First writer Tobias Foller, a PhD scholar in Dr. Joshi’s group, says he first learn concerning the temperature technique that enhances the properties of GO with out altering the chemical construction in a paper by researchers from Massachusetts Institute of Expertise (MIT).

“I used to be instantly fascinated. Studying extra, I observed a vital quantity of analysis was utilizing this phenomenon to fine-tune the properties of GO for a wide selection of doable functions. However none of those research confirmed a direct statement of the mechanism – they assumed it was driving these enhancements, however didn’t really exhibit it”. Foller determined to begin wanting into the difficulty extra carefully.

Whereas the primary promising outcomes started to kind, Priyank Kumar – the primary writer on the MIT paper – joined UNSW as a Scientia Lecturer in Engineering, at simply the suitable time to assist see the experimental discovery take place.

“I used to be thrilled to see the primary outcomes that might lastly give direct proof to our earlier work,” Dr. Kumar, who additionally collaborated on the research revealed this month, says.

“Now that we perceive this mechanism, and have seen the way it really performs out in actual life, we will management the properties of GO extra exactly,” says Dr. Joshi.

“This all provides as much as a key discovering that offers us a deeper understanding of the properties of GO – and it would play a key position in bringing it a step closer to real-world functions comparable to sustainable water filtration, hydrogen era and lots of extra,” Dr. Joshi says.

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