Research progress of applications of freestanding single crystal oxide thin film

Abstract

Flexible electronics are of great interest to researchers because of their wide applications such as information storage, energy harvesting and wearable device. To realize extraordinary functionalities, freestanding single crystal oxide thin film is applied due to its super elasticity, easy-to-transfer, and outstanding ferro/electric/magnetic properties. Owing to state-of-art synthesis methods, functional oxide film of various materials can be obtained in freestanding phase, which eliminates the restrictions from growth substrate and can be transferal to other flexible layers. In this paper, we firstly introduce wet etching and mechanical exfoliation methods applied to prepare freestanding single crystal oxide thin film, then review their applications in ferroelectric memory, piezoelectric energy harvester, dielectric energy storage, correlated oxide interface, and novel freestanding oxide structure. Summary of recent research progress and future outlooks are finally discussed.

Lossless Watermarking Algorithm for Geographic Point Cloud Data Based on Vertical Stability

“…Therefore, this paper proposes a watermarking scheme based on the vertical attribute and relative storage order of point cloud data. Before introducing the proposed scheme, the following three questions need to be answered: (1) What are the invariant features of geospatial point cloud data? (2) How can these invariant features be used to establish a robust index?…”

“…Geographic point cloud data have extremely high military, scientific, social, and economic values and play an important foundational role in multiple fields, such as military operations, scientific research, map drawing, autonomous driving, and smart cities [1][2][3]. However, with the continuous growth of data sharing demands and increasingly convenient data transmission, the illegal use and infringement of geographic point cloud data occur frequently [4,5].…”