Issue 1, 2020

Broadband SERS detection with disordered plasmonic hybrid aggregates

Abstract

Plasmonic nanostructures possessing broadband intense field enhancement over a large area are highly desirable for nanophotonic and plasmonic device applications. In this study, 3D Ag hybrid nanoaggregates (3D-Ag-HNAs) are achieved via a highly efficient oblique angle gas-phase cluster beam deposition method. Not only can such structures produce a high density of plasmonic hot-spots to improve Raman sensitivity, but more importantly they generate kissing point-geometric singularities with a broadband optical response. We succeed in obtaining an experimental SERS enhancement factor beyond 4 × 107 in the visible range, providing an optimal sensing platform for different analytes. Combined with good uniformity, reproducibility and ease of fabrication, our 3D-Ag-HNA offers a candidate for new generations of SERS systems.

Graphical abstract: Broadband SERS detection with disordered plasmonic hybrid aggregates

Supplementary files

Article information

Article type
Paper
Submitted
20 Sep 2019
Accepted
13 Okt 2019
First published
14 Okt 2019
This article is Open Access
Creative Commons BY-NC license

Nanoscale, 2020,12, 93-102

Broadband SERS detection with disordered plasmonic hybrid aggregates

P. Mao, C. Liu, Q. Chen, M. Han, S. A. Maier and S. Zhang, Nanoscale, 2020, 12, 93 DOI: 10.1039/C9NR08118F

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