Broadband SERS detection with disordered plasmonic hybrid aggregates. Issue 1 (1st November 2019)

• Record Type: Journal Article
• Authors: Mao, Peng; Liu, Changxu; Chen, Qiang; Han, Min; Maier, Stefan A.; Zhang, Shuang
• Is Part Of: Nanoscale. Volume 12:Issue 1(2020)
• Page Start: 93
• Page End: 102
• Publication Date: 2019-11-01
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c9nr08118f
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Plasmonic nanostructures possessing broadband intense field enhancement over a large area are highly desirable for nanophotonic and plasmonic device applications. 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 × 10 7 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.