Broadband SERS detection with disordered plasmonic hybrid aggregates

Mao, Peng; Liu, Changxu; Chen, Qiang; Han, Min; Maier, Stefan A. und Zhang, Shuang (2020): Broadband SERS detection with disordered plasmonic hybrid aggregates. In: Nanoscale, Bd. 12, Nr. 1: S. 93-102

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 x 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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 2040-3364
• Sprache: Englisch