Issue 10, 2021
From the journal:

Nanoscale Horizons

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

Rihan Wu,‡a   Qihao Jin, ORCID logo ‡b   Catherine Storey,a   Jack Collins,a   Guillaume Gomard, ORCID logo c   Uli Lemmer,b   Leigh Canham,a   Rainer Klingb  and  Andrey Kaplan ORCID logo *a  

* Corresponding authors

a School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
E-mail: a.kaplan.1@bham.ac.uk

b Light Technology Institute, Karlsruhe Institute of Technology, Engesserstrasse 13, 76131 Karlsruhe, Germany

c Carl Zeiss AG, ZEISS Innovation Hub@KIT, Hermann-von-Helmholtz-Platz 6, 76344 Eggenstein-Leopoldshafen, Germany

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.

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

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Article information

DOI
https://doi.org/10.1039/D1NH00228G
Article type
Communication
Submitted
21 Apr 2021
Accepted
14 Jul 2021
First published
16 Jul 2021
This article is Open Access
Creative Commons BY-NC license

Nanoscale Horiz., 2021,6, 781-790

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

R. Wu, Q. Jin, C. Storey, J. Collins, G. Gomard, U. Lemmer, L. Canham, R. Kling and A. Kaplan, Nanoscale Horiz., 2021, 6, 781 DOI: 10.1039/D1NH00228G

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