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Abstract

Structure design and performance regulation of functional materials are the cutting-edge hot topic in the field of materials science and condensed mater physics. Constructing hierarchical structures with functional units recently has become a new paradigm to improve the functionality of functional materials and explore new physical phenomena. Understanding the origin of physical properties of functional materials constructed by functional units requires us to precisely characterize the structure, configuration and spatial patterns of functional units, and their couplings. Aberration-corrected transmission electron microscopy has proven to be powerful in revealing the atomic structure, chemistry and electronic configuration of the functional materials with low symmetry and complex compositions, which provides a new avenue to reveal the functional units and their spatial patterns with high precision from different aspects and finally establish the structure-propertys relationship. In this paper, we summarize the inherent characteristics of typical functional units with different sizes, and the hierarchical structures constructed by functional units at the picoscale, by which the relationship between structures and functionality is revealed. The breakthrough and development of aberration-corrected transmission electron microscopy lays a solid foundation for understanding the origin of functionality of new materials constructed by functional units.

Keywords:

functional materials/
functional units/
aberration-corrected transmission electron microscopy/
picoscale

Authors and contacts

Xiao Dong-Dong^1,3,
Gu Lin^1,2,3

Corresponding author:Gu Lin,l.gu@iphy.ac.cn

Funds:Project supported by the Natural Science Foundation of Beijing, China (Grant No. Z190010).

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Cited By

DownLoad: Full-Size Img PowerPoint

成像技术	空间分辨率/pm	测量精度/pm	样品厚度/nm	所需条件	特点
出射波重构	80^[30]	3 <σ<10^[31]	< 10	重构软件	同时获取振幅和相位信息
负球差成像	57^[32]	σ<1^[33]	< 5	负球差系数	对轻元素敏感
高角环形暗场成像	40.5^[34]	σ<1^[27]	< 50	环形探测器	对重元素敏感
环形明场成像	44.4^[35]	1.5 <σ<3.8^[36]	< 50	环形探测器	对轻元素敏感
积分差分相位衬度成像	63^[37]	0.97 <σ<2.3^[33]	< 50	四象限探测器	对轻元素敏感、低剂量
电子叠层衍射成像	23^[38]	σ< 1^[38,39]	< 50	高速探测器、特定算法	深亚埃分辨、低剂量

DownLoad: CSV

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Vol. 72, Issue 11 - 2023-06-05

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