Permanent preservation of data is essential for massive information recording. Combination of semiconductor with plasmonic nanoparticles has been applied in multicolor display and high-density optical storage. However, bidirectional electron transfer occurs at the Schottky interface under UVA irradiation, resulting in reversible photochemical reaction, information erasure, low recording efficiency and writing rate. To address these issues, a novel Schottky heterostructure of Ag/Ta₂O₅ modified with alkali halide is developed to realize photoinduced one-directional electron transfer from metal to semiconductor. The recorded information in such a medium of KCl-Ag/Ta₂O₅ presents excellent holographic storage stability even under exposure of a strong UVA ray (360 nm, 385 mW/cm²). Meanwhile, grating growth rate and efficiency are significantly enhanced by optimizing Ag particle distance and Cl⁻ anion loading amount. This work provides an important strategy for fast and persistent data storage.

中文翻译：

---

基于单向电子转移的 KCl-Ag/Ta2O5 纳米复合材料中持久性全息光栅的加速形成

数据的永久保存对于海量信息记录至关重要。半导体与等离子体纳米粒子的结合已应用于多色显示和高密度光存储。然而，在UVA照射下肖特基界面发生双向电子转移，导致可逆的光化学反应、信息擦除、低记录效率和低写入率。为了解决这些问题，开发了一种新型的由碱金属卤化物改性的 Ag/Ta ₂ O ₅肖特基异质结构，以实现从金属到半导体的光诱导单向电子转移。KCl-Ag/Ta ₂ O ₅这种介质中记录的信息即使暴露在强 UVA 射线（360 nm，385 mW/cm ²）下，也具有出色的全息存储稳定性。同时，通过优化Ag粒子距离和Cl ^-阴离子负载量，光栅生长速率和效率显着提高。这项工作为快速和持久的数据存储提供了重要的策略。