Issue 19, 2019

A porous Au–Ag hybrid nanoparticle array with broadband absorption and high-density hotspots for stable SERS analysis

Abstract

Constructing high-density hotspots is of crucial importance in surface enhanced Raman scattering (SERS). In this paper, we present a large-area and broadband porous Au–Ag hybrid nanoparticle array which was fabricated by an ultra-thin alumina mask (UTAM) technique incorporated with annealing and galvanic replacement techniques. Experimental results and numerical simulations demonstrated that the porous Au–Ag hybrid nanoparticle array possessed enormous hotspots for high sensitivity, uniformity, and stability in SERS analysis. A large Raman enhancement factor of 2.2 × 107 was achieved with a relative standard deviation (RSD) of 7.7%, leading to excellent reliability for Raman detection. Furthermore, this novel substrate exhibited a long shelf time in an ambient environment and promising practical applications in many SERS-based quantitative analytical and biomedical sensing techniques.

Graphical abstract: A porous Au–Ag hybrid nanoparticle array with broadband absorption and high-density hotspots for stable SERS analysis

Supplementary files

Article information

Article type
Paper
Submitted
26 Feb 2019
Accepted
23 Apr 2019
First published
24 Apr 2019

Nanoscale, 2019,11, 9587-9592

A porous Au–Ag hybrid nanoparticle array with broadband absorption and high-density hotspots for stable SERS analysis

K. Li, G. Liu, S. Zhang, Y. Dai, S. Ghafoor, W. Huang, Z. Zu and Y. Lu, Nanoscale, 2019, 11, 9587 DOI: 10.1039/C9NR01744E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements