Researchers develop novel 'super-tetragonal' sacrificial layer for large-area crystalline freestanding oxide membranes

https://phys.org/news/2024-03-super-tetragonal-sacrificial-layer-freestanding.html

"superelasticity induced quantum-derived phenomena... Sr4Al2O7 film enabling coherent ABO3/SAOT epitaxial heterostructure growth, suppressing crack formation during water-assisted release, crack-free areas span up to few mm, 1–3 orders magnitude larger than previously... crystallinity and functionalities of membrane comparable to epitaxial membranes grown on single crystalline substrates... Sr4Al2O7 high water solubility slowing water-assisted releasing processes enhances efficiency... 2D flexible electronic devices"