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在现场观测原子运动和操纵结构转变

Tong-Tong Shi^1,2, Yu-Shu Li^1,2, Yin-Lian Zhu^3,4

¹Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.

Advanced materials (Deerfield Beach, Fla.)

|November 17, 2025

概括

科学家们使用电子束精确控制了KTaO3中的原子尺度结构转换,创造了一个新的K6Ta10.8O30阶段. 这种电子束制造方法为开发具有量身定制性质的新型功能材料提供了多功能途径.

科学领域:

材料科学材料科学材料科学
晶体学晶体学是指结晶学.
纳米技术纳米技术

背景情况:

精确控制晶体材料的结构变化对于释放新的功能至关重要.
原子规模的结构操纵仍然是材料科学中的一个重大挑战.

研究的目的:

为了证明直接观察和实现原子规模的结构转换.
建立一种通用途径,用于合成具有定制性质的新功能材料.

主要方法:

在扫描传输电子显微镜 (STEM) 中利用了高能电子束制造.
在KTaO3中引入 (K) 和氧 (O) 的空缺,通过敲击能量转移.
使用低剂量,现场,原子尺度成像和密度功能理论 (DFT) 计算.

主要成果:

通过操纵 Ta 原子运动,成功地将 KTaO3 转化为新的 K6Ta10.8O30 阶段.
由电子束刺激的所有原子物种的观察到的合作运动.
验证了新的K6Ta10.8O30阶段的可控性和稳定性.

结论:

电子束制造为原子规模的结构转换提供了一种可控的方法.
在特定空缺条件下,从KTaO3中形成K6Ta10.8O30在能量方面是有利的.
这项研究为合成先进的功能材料提供了新的途径.

关键词:

原子运动原子运动电子束辐射辐射的电子束辐射.扫描传输电子显微镜扫描传输电子显微镜结构转型结构转型

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