In situ Study of Oxidative Etching of Palladium Nanocrystals by Liquid Cell Electron Microscopy

被引：121

作者：

Jiang, Yingying ^{[1
,2
]}

Zhu, Guomin ^{[1
,2
]}

Lin, Fang ^{[3
]}

Zhang, Hui ^{[1
,2
]}

Jin, Chuanhong ^{[1
,2
]}

Yuan, Jun ^{[1
,2
,4
]}

Yang, Deren ^{[1
,2
]}

Zhang, Ze ^{[1
,2
]}

机构：

[1] Zhejiang Univ, Cyrus Tang Ctr Sensor Mat & Applicat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

[2] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China

[3] South China Agr Univ, Coll Sci, Guangzhou 510642, Guangdong, Peoples R China

[4] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

来源：

NANO LETTERS | 2014年 / 14卷 / 07期

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会;

关键词：

Oxidative etching; liquid cell; electron microscopy; dissolution kinetics; diffusion layer; POLYOL SYNTHESIS; PD NANOCRYSTALS; NANOPARTICLES; SHAPE; PLATINUM; DISSOLUTION; GROWTH; SILVER; SIZE; NI;

D O I：

10.1021/nl500670q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：3761 / 3765

页数：5

共 39 条

[1] Synthesis of Uniform Hollow Oxide Nanoparticles through Nanoscale Acid Etching [J].