Atomic force microscopy study of nanoporous gold surface and electrochemical properties

被引：3
作者：
Gao, Panpan [1 ,2 ]
Qian, Ping [1 ,2 ]
Qiao, Lijie [1 ,3 ]
Volinsky, Alex A. [4 ]
Su, Yanjing [1 ,3 ]
机构：
[1] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Dept Phys, Beijing 100083, Peoples R China
[3] Univ Sci & Technol Beijing, Adv Mat & Technol Inst, Beijing 100083, Peoples R China
[4] Univ S Florida, Dept Mech Engn, Tampa, FL 33620 USA
来源：
SCRIPTA MATERIALIA | 2019年 / 168卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Nanoporous gold; Dealloying; Coarsening; Atomic force microscopy; STRAIN; FABRICATION; EVOLUTION;
D O I：
10.1016/j.scriptamat.2019.03.044
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The morphology, surface oxide and strain evolution of nanoporous (np) gold were investigated using atomic force microscopy (AFM). Topographic AFM images show typical np structure with a few nanometers ligament size. Current sensing AFM results revealed semiconductor properties of the surface oxide, which may consist of Ag2O (p-type) and Ago (n-type). The surface oxide can effectively suppress the np structure coarsening. In-situ electrochemical AFM tests exhibit a refined macroscopic dimensional change of 40 nm within 0.35-0.7 V potential range. AFM can be used as an effective method to investigate the morphology and voltage-induced dimension changes in electrolyte. (C) 2019 Published by Elsevier Ltd on behalf of Acta Materialia Inc.
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页码：1 / 4
页数：4
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