1. Recycling of Perovskite Substrate
- Author
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Wang, Jie, Liang, Yuhan, Wang, Yue, Yang, Shengan, Zhang, Xinyu, Huang, Xin, Wang, Yajuan, Liang, Zhaowei, Ma, Ji, Zhang, Hui, Chen, Qingming, Ma, Jing, Lin, Yuanhua, and Wu, Liang
- Subjects
Condensed Matter - Materials Science ,Materials Science (cond-mat.mtrl-sci) ,FOS: Physical sciences ,Applied Physics (physics.app-ph) ,Physics - Applied Physics - Abstract
The use of water-soluble sacrificial layer of Sr$_3$Al$_2$O$_6$ has tremendously boosted the research on freestanding functional oxide thin films, especially thanks to its ultimate capability to produce high-quality epitaxial perovskite thin films. However, the costly single-crystalline substrates, e.g. SrTiO$_3$, were generally discarded after obtaining the freestanding thin films. Here, we demonstrate that the SrTiO$_3$ substrates can be recycled to fabricate La$_{0.7}$Sr$_{0.3}$MnO$_3$ films with nearly identical structural and electrical properties. After attaining freestanding thin films, the residues on SrTiO$_3$ can be removed by 80 \degree C hot water soaking and rinsing treatments. Consequently, the surface of SrTiO$_3$ reverted to its original step-and-terrace structure.
- Published
- 2022