Gold nanoplasmonic particles in tunable porous silicon 3D scaffolds for ultra-low concentration detection by SERS

Rihan Wu, Qihao Jin, Catherine Storey, Jack Collins, Guillaume Gomard, Uli Lemmer, Leigh Canham, Rainer Kling, Andrey Kaplan

Research output: Contribution to journalArticlepeer-review

44 Downloads (Pure)

Abstract

A composite material of plasmonic nanoparticles embedded in a scaffold of nano-porous silicon offers unmatched capabilities for use as a SERS substrate. The marriage of these components presents an exclusive combination of tightly focused amplification of Localised Surface Plasmon (LSP) fields inside the material with an extremely high surface-to-volume ratio. This provides favourable conditions for a single molecule or extremely low concentration detection by SERS. In this work the advantage of the composite is demonstrated by SERS detection of Methylene Blue at a concentration as low as a few picomolars. We systematically investigate the plasmonic properties of the material by imaging its morphology, establishing its composition and the effect on the LSP resonance optical spectra.

Original languageEnglish
Pages (from-to)781-790
Number of pages10
JournalNanoscale horizons
Volume6
Issue number10
Early online date16 Jul 2021
DOIs
Publication statusPublished - 1 Oct 2021

Fingerprint

Dive into the research topics of 'Gold nanoplasmonic particles in tunable porous silicon 3D scaffolds for ultra-low concentration detection by SERS'. Together they form a unique fingerprint.

Cite this