Volume 42, Issue 22 pp. 2757-2764
Concise Report

In Situ Liquid Cell Transmission Electron Microscopy Observations of Growth and Anticorrosion Behaviors of AuCl3 Shell on Au Nanobipyramids

Wei Wei

Wei Wei

School of Information Technology, Jiangsu Open University, Nanjing, Jiangsu, 210036 China

SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Collaborative Innovation Center for Micro/Nano Fabrication, Device and System, Southeast University, Nanjing, Jiangsu, 210096 China

Search for more papers by this author
Jun Sun

Jun Sun

School of Information Technology, Jiangsu Open University, Nanjing, Jiangsu, 210036 China

Search for more papers by this author
Songtao Zhang

Songtao Zhang

Testing Center, Yangzhou University, Yangzhou, Jiangsu, 225009 China

Search for more papers by this author
Litao Sun

Corresponding Author

Litao Sun

SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Collaborative Innovation Center for Micro/Nano Fabrication, Device and System, Southeast University, Nanjing, Jiangsu, 210096 China

E-mail: [email protected]; [email protected]Search for more papers by this author
Feng Xu

Corresponding Author

Feng Xu

SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Collaborative Innovation Center for Micro/Nano Fabrication, Device and System, Southeast University, Nanjing, Jiangsu, 210096 China

E-mail: [email protected]; [email protected]Search for more papers by this author
First published: 11 July 2024

Comprehensive Summary

Designing new materials and architectures to maintain activity and stability requires a better understanding on the anticorrosion dynamics of nanoparticles. Under-coordinated atoms on the surface of nanoparticles can be protected by deposited shells. Real-time observation on how protective shells grow and play a role is challenging but worthwhile. Here, protective effects of AuCl3 shells on Au nanobipyramids (NBPs) are studied in HAuCl4 aqueous solutions by in-situ liquid cell transmission electron microscopy (LCTEM). This study is the first to observe the formation of Au-AuCl3 core-shell nanostructure and the corresponding anticorrosion behaviors of AuCl3 deposited shell. The presence of CTAB can substantially influence the growth mode and structure of AuCl3 shell, by a direct or indirect way, intervene the dissolution of Au NBP. These growth or dissolution kinetics here revealed at the nanoscale provide insights towards engineering of the surface anticorrosion to pursue Au nanoparticles with improved stability in acidic environment.

image

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.