Published July 2019 | Version v1
Journal article Metadata-only

Atomic force microscopy study of nanoporous gold surface and electrochemical properties

Creators

  • 1. Department of Physics, University of Science and Technology Beijing, Beijing 100083 (China)
  • 2. Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083 (China)
  • 3. Advanced Material and Technology Institute, University of Science and Technology Beijing, Beijing 100083 (China)
  • 4. Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620 (United States)

Description

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.

Additional details

Identifiers

DOI
10.1016/j.scriptamat.2019.03.044;
PII
S1359646219301873;

Publishing Information

Journal Title
Scripta Materialia
Journal Volume
168
Journal Page Range
p. 1-4
ISSN
1359-6462
CODEN
SCMAF7

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
55043293
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ATOMIC FORCE MICROSCOPY; ELECTRIC POTENTIAL; ELECTROCHEMISTRY; ELECTROLYTES; GOLD; MORPHOLOGY; SEMICONDUCTOR MATERIALS; SILVER OXIDES; SURFACES
Descriptors DEC
CHALCOGENIDES; CHEMISTRY; ELEMENTS; MATERIALS; METALS; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; SILVER COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS

Optional Information

Copyright
Copyright (c) 2019 Published by Elsevier Ltd on behalf of Acta Materialia Inc.