Research

Overview

As we are entering the “post-aberration-correction age” in TEM, atomic resolution blown past Ångström has armed materials scientists with unprecedented opportunities to access local atomic arrangement, site specific chemical composition, electronic bonding and etc.. Meanwhile, to go beyond this “static” and often “isolated” view of materials microstructure, our research interests are focusing on gaining a dynamic and sometimes correlative insights into materials systems relating to their synthesis, performance and degradation.

Heterogeneous Catalysis

Heterogeneous

Developing new catalysts with high activity, selectivity and stability holds the key to the solutions of many global challenges we are facing today, including energy shortage, air pollution and climate change. The ultimate goal of “designer catalysts” is largely based on the knowledge of catalytic active sites in atomic details during catalysis.Our research aims at filling this knowledge gap and to provide invaluable experimental insights into the mechanistic of reaction pathways, through studying working catalytic structure under reaction conditions and during catalysis.


 

Radiation Effect and Nuclear Alloys

Radiation Effect

Nuclear power is one of the most scientifically achievable, environmentally acceptable and technologically promising alternative sources of energy. The safety and reliability of next-generation fission and future fusion energy systems depend ultimately on the development of advanced reactor core structural materials. We work on establish the critical correlations between nuclear irradiation defects and their irradiation conditions/history as well as with mechanical properties, which will inform reactor lifetime prediction and accurate alloy development.


 

In-situ Environmental (S)TEM

In-situ Environmental (S)TEM

Conventional TEM is a UHV characterization instrument, but recent development in in-situ as well as operando techniques has transformed TEM into a miniature materials research laboratory. One major strut in our research is to understand the emerging challenges in in-situ imaging and operando measurement synchronization, and to develop strategies to improve experimental reliability and reproducibility.

Conventional TEM is a UHV characterization instrument, but recent development in in-situ as well as operando techniques has transformed TEM into a miniature materials research laboratory. One major strut in our research is to understand the emerging challenges in in-situ imaging and operando measurement synchronization, and to develop strategies to improve experimental reliability and reproducibility.


 

Deep Learning Microscopy

Deep Learning Microscopy

(S)TEM is a powerful tool in resolving multi-scale but sometimes overwhelmingly detailed structural and chemical information. Currently, no satisfactory method exists to help in bridge the microstructure data and the macroscopic properties, causing an increasingly large bottleneck for materials advancement. We are interested in developing computer algorithms including Deep-Learning-based semantic segmentation capable of high throughput demographic analysis on defect population.


 

ColorATEM

ColorATEM

Analytical TEM including electron energy loss spectroscopy (EELS) and energy dispersive X-ray spectroscopy (EDX) have been well established for robust solid materials. We are interested in extending this informative chemical analysis to bio-hybrid nanocomposites and to life science.