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

doi:10.1039/d1nh00228g

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

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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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 language	English
Pages (from-to)	781-790
Number of pages	10
Journal	Nanoscale horizons
Volume	6
Issue number	10
Early online date	16 Jul 2021
DOIs	https://doi.org/10.1039/d1nh00228g
Publication status	Published - 1 Oct 2021

ASJC Scopus subject areas

General Materials Science

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10.1039/d1nh00228gLicence: Creative Commons: Attribution-NonCommercial (CC BY-NC)

d1nh00228gFinal published version, 4.65 MBLicence: Creative Commons: Attribution-NonCommercial (CC BY-NC)

Research PhD - Optical Filter Technology
Kaplan, A.
Defence and Science Technology Laboratory
1/12/15 → 24/12/21
Project: Other Government Departments

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AU - Lemmer, Uli

AU - Canham, Leigh

AU - Kling, Rainer

AU - Kaplan, Andrey

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

Abstract

ASJC Scopus subject areas

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Projects

Research PhD - Optical Filter Technology

Cite this