Near-infrared surface-enhanced Raman scattering on silver-coated porous silicon photonic crystals

Škrabić, Marko and Kosović, Marin and Gotić, Marijan and Mikac, Lara and Ivanda, Mile and Gamulin, Ozren (2019) Near-infrared surface-enhanced Raman scattering on silver-coated porous silicon photonic crystals. Nanomaterials, 9 (3). E421. ISSN 2079-4991

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Abstract

Surface-enhanced Raman scattering (SERS) with near-infrared (NIR) excitation offers a safe way for the detection and study of fragile biomolecules. In this work, we present the possibility of using silver-coated porous silicon photonic crystals as SERS substrates for near-infrared (1064 nm) excitation. Due to the deep penetration of NIR light inside silicon, the fabrication of photonic crystals was necessary to quench the band gap photoluminescence of silicon crystal, which acts as mechanical support for the porous layer. Optimal parameters of the immersion plating process that gave maximum enhancement were found and the activity of SERS substrates was tested using rhodamine 6G and crystal violet dye molecules, yielding significant SERS enhancement for off-resonant conditions. To our knowledge, this is the first time that the 1064 nm NIR laser excitation is used for obtaining the SERS effect on porous silicon as a substrate.

Item Type: Article
Additional Information: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Departments: Katedra za fiziku i biofiziku
Depositing User: Kristina Berketa
Status: Published
Creators:
CreatorsEmail
Škrabić, MarkoUNSPECIFIED
Kosović, MarinUNSPECIFIED
Gotić, MarijanUNSPECIFIED
Mikac, LaraUNSPECIFIED
Ivanda, MileUNSPECIFIED
Gamulin, OzrenUNSPECIFIED
Date: 12 March 2019
Date Deposited: 13 Nov 2019 11:26
Last Modified: 13 Nov 2019 11:26
Subjects: /
Projects:
Project titleProject leaderProject ref.Funder
Hibribridne silicijske nanostrukture za senzorikuIvanda, MileIP-2014-09-7046Hrvatska zaklada za znanost
ZCI za napredne materijale i senzore – CEMSUNSPECIFIEDKK.01.1.1.01.0001European Regional Development Fund
Related URLs:
URI: http://medlib.mef.hr/id/eprint/3485

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