title: In situ study of oxidative etching of palladium nanocrystals by liquid cell electron microscopy.
abstract: Oxidative etching has widely prevailed in the synthesis of a crystal and played a critical role in determining the final growth behavior. In this Letter, we report an in situ microscopic study on the oxidative etching of palladium cubic nanocrystals by liquid cell scanning transmission electron microscopy. The etching was realized with oxidative radiation reactants from electron-water interaction in the presence of Br(-) ions. Dissolution dynamics of monodispersed and aggregated nanocrystals were both investigated and compared. Analyses on the dissolution kinetics of nanocrystals and the diffusion kinetics of the dissolved agents were carried out based on the scanning transmission electron microscopy characterizations. The results presented here pave a way toward the quantitative understanding of the oxidative etching reaction and its application in the functionally orientated fabrication of nanocrystals with certain sizes, structures, and morphologies.
authors.affiliation: State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, Cyrus Tang Center for Sensor Materials and Applications, and Department of Materials Science and Engineering, Zhejiang University , Hangzhou, Zhejiang 310027, P. R. China.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Jiang
authors.forename: Guomin
authors.initials: G
authors.lastname: Zhu
authors.forename: Fang
authors.initials: F
authors.lastname: Lin
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
authors.forename: Chuanhong
authors.initials: C
authors.lastname: Jin
authors.forename: Jun
authors.initials: J
authors.lastname: Yuan
authors.forename: Deren
authors.initials: D
authors.lastname: Yang
authors.forename: Ze
authors.initials: Z
authors.lastname: Zhang