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

Wu, Rihan; Jin, Qihao ORCID iD icon 1; Storey, Catherine J.; Collins, Jack; Gomard, Guillaume; Lemmer, Uli 1; Canham, Leigh T.; Kling, Rainer 1; Kaplan, Andrey
1 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)


A composite material of plasmonic nanoparticles embedded in the scaffold of nanoporous Silicon offers unmatched capabilities to use it 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 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 the concentration as low a few picomolars. We systematically investigate the plasmonic properties of the material by imaging its morphology, establishing composition and their effect on the LSP resonance optical spectra.

Verlagsausgabe §
DOI: 10.5445/IR/1000135530
Veröffentlicht am 28.08.2021
DOI: 10.1039/D1NH00228G
Zitationen: 20
Zitationen: 22
Cover der Publikation
Zugehörige Institution(en) am KIT Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2055-6756, 2055-6764
KITopen-ID: 1000135530
Erschienen in Nanoscale horizons
Verlag Royal Society of Chemistry (RSC)
Band 6
Heft 10
Seiten 781-790
Vorab online veröffentlicht am 16.07.2021
Nachgewiesen in Web of Science
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