Using this approach, they grew thin-film single crystals of two different perovskite hydrides and characterized their hydride-ion conductivity. These efforts will bolster research on hydrogen-related materials.
Even though perovskite hydrides represent a unique platform for applied materials science, characterizing their physical properties has proven challenging. In particular, measuring the Hconductivity of these crystalline materials is not straightforward. In most studies, researchers use powdered samples in their characterization analyses, meaning that Hconductivity of a given perovskite, one needs to produce a uniform, continuous single crystal with as few imperfections as possible.
Nearby the pellet was a carefully selected substrate, onto which the hydrogen and metals spontaneously combined to form the desired perovskite. As atoms began to pile up onto the substrate, they spontaneously arranged and aligned themselves in a consistent manner with the crystal layers below them. This led to the epitaxial growth of a nanofilm on the substrate.
With any luck, this newfound strategy for growing high-quality perovskite hydride crystals will open up new frontiers in hydrogen materials science and pave the way to sustainability.The remarkable proton and oxide-ion conductivities of hexagonal perovskite-related oxide Ba7Nb3.8Mo1.2O20.1 are promising for next-generation electrochemical devices. The unique ...
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