Hybrid plasmonic/photonic crystals for optical detection of bacterial contaminants

Giuseppe M. Paternò; Liliana Moscardi; Stefano Donini; Aaron M. Ross; Silvia M. Pietralunga; Nicholas Dalla Vedova; Simone Normani; Ilka Kriegel; Guglielmo Lanzani; Francesco Scotognella

doi:10.1051/epjconf/202023807002

All issues

Volume 238 (2020)

EPJ Web Conf., 238 (2020) 07002

Abstract

Open Access

Issue		EPJ Web Conf. Volume 238, 2020 EOS Annual Meeting (EOSAM 2020)


Article Number		07002
Number of page(s)		2
Section		Topical Meeting (TOM) 7- Organic & Hybrid Semiconductor Materials and Devices
DOI		https://doi.org/10.1051/epjconf/202023807002
Published online		20 August 2020

EPJ Web of Conferences 238, 07002 (2020)
https://doi.org/10.1051/epjconf/202023807002

Hybrid plasmonic/photonic crystals for optical detection of bacterial contaminants

Giuseppe M. Paternò¹^*, Liliana Moscardi¹^,2, Stefano Donini¹, Aaron M. Ross², Silvia M. Pietralunga¹^,3, Nicholas Dalla Vedova¹, Simone Normani¹, Ilka Kriegel⁴, Guglielmo Lanzani¹^,2 and Francesco Scotognella

¹ Center for Nano Science and Technology, Istituto Italiano di Tecnologia (IIT), Via Pascoli 10, 20133, Milano, Italy
² Physics Department, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
³ Institute for Photonics and Nanotechnologies (IFN), Consiglio Nazionale delle Ricerche (CNR), Piazza L. da Vinci 32, 20133 Milano, Italy
⁴ Department of Nanochemistry, Istituto Italiano di Tecnologia (IIT), via Morego, 30, 16163 Genova, Italy

^* Corresponding author: giuseppe.paterno@iit.it

Published online: 20 August 2020

Abstract

Here, we show that a hybrid plasmonic/photonic crystal consisting of a thin layer of bioactive plasmonic material (i.e. silver) deposited on top a 1D PhC can detect one of the most common bacterial contaminant, namely Escherichia coli. We speculate that the change in the plasmon charge density brought about by metal/bacterium interaction results in a variation of the plasmon resonance that, in turns, translates in a shift of the photonic structural color.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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