Phys.org January 3, 2023
The aggressive oxidizing conditions typically used in growing epitaxial oxides can damage graphene. A team of researchers in the US (University of Minnesota, Pacific Northwest National Laboratory, University of Wisconsin) used hybrid molecular beam epitaxy for SrTiO3 growth that did not require an independent oxygen source, thus avoided graphene damage. They produced epitaxial films with self-regulating cation stoichiometry. The film could be exfoliated and transferred to foreign substrates. The results opened the door to future studies of previously unattainable freestanding oxide nanomembranes grown in an adsorption-controlled manner by hybrid molecular beam epitaxy. According to the researchers their approach has potentially important implications for the commercial application of perovskite oxides in flexible electronics and as a dielectric in van der Waals thin-film electronics…read more. Open Access TECHNICAL ARTICLE
Comparison of growth techniques for perovskite oxides on graphene. Credit: SCIENCE ADVANCES, 23 Dec 2022, Vol 8, Issue 51