Surface Defects Improved SERS Activity of Nanoporous Gold Prepared by Electrochemical Dealloying

Ling Zhang; Zhiyu Jing; Zhexiao Li; Takeshi Fujita

doi:10.3390/nano13010187

Nanomaterials (Dec 2022)

Surface Defects Improved SERS Activity of Nanoporous Gold Prepared by Electrochemical Dealloying

Ling Zhang,
Zhiyu Jing,
Zhexiao Li,
Takeshi Fujita

Affiliations

Ling Zhang: School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Zhiyu Jing: School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Zhexiao Li: School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Takeshi Fujita: School of Environmental Science and Engineering, Kochi University of Technology, Kochi 782-8502, Japan

DOI: https://doi.org/10.3390/nano13010187
Journal volume & issue: Vol. 13, no. 1
p. 187

Abstract

Read online

Nanoporous metals possess excellent catalytic and optical properties that are related with surface morphology. Here, we modulated the ligament surface of nanoporous gold (NPG) by controlling electrochemical dealloying and obtained NPG with an improved enhancement of its surface-enhanced Raman scattering (SERS) property. We found that both high-density atomic steps and kinks on the curved surfaces and high-content silver atoms close to the ligament surface contributed to the high SERS ability. The presented strategy will be useful for the fabrication of nanoporous metal with an excellent surface that is needed for sensing, conversion, and catalytic.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

About the journal

Abstract

Keywords