Issue 26, 2017, Issue in Progress
From the journal:

RSC Advances

Gradient nanoporous gold: a novel surface-enhanced Raman scattering substrate†

Jinglin Huang, ORCID logo a   Yansong Liu,a   Xiaoshan He,a   Cuilan Tang,ab   Kai Dua  and  Zhibing He*a  

* Corresponding authors

a Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

b School of Material Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China

Abstract

The design and fabrication of surface-enhanced Raman scattering (SERS) substrates with high Raman enhancement, stability, homogeneity and processing compatibility is still one of the most challenging issues in SERS research. In this work, a novel nanoporous gold (NPG) structure that contains a gradient of ligament and pore structures along the thickness direction is designed and simply fabricated by combination of the traditional magnetron sputtering and dealloying technique. This novel nanoporous gold structure (we called it gradient nanoporous gold, GNPG) brings abundant inner structures into conventional nanoporous gold, which can produce remarkable properties for GNPG, such as the surface enhanced Raman scattering. GNPG was demonstrated to have ultrahigh and homogeneous surface enhanced Raman scattering. A simple method was proposed to estimate the relative enhancement factor (EF). The EF of GNPG was estimated to be ∼8-fold higher than conventional NPG, which means that its EF should over 107. It is believed that the gradient ligament structure of GNPG plays a key role for its Raman scattering enhancement.

Graphical abstract: Gradient nanoporous gold: a novel surface-enhanced Raman scattering substrate

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Article information

DOI
https://doi.org/10.1039/C6RA28591K
Article type
Paper
Submitted
23 Dec 2016
Accepted
03 Mar 2017
First published
09 Mar 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 15747-15753

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Gradient nanoporous gold: a novel surface-enhanced Raman scattering substrate

J. Huang, Y. Liu, X. He, C. Tang, K. Du and Z. He, RSC Adv., 2017, 7, 15747 DOI: 10.1039/C6RA28591K

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