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Magnetochemistry 2017, 3(4), 32; https://doi.org/10.3390/magnetochemistry3040032

SERS Detection of Penicillin G Using Magnetite Decorated with Gold Nanoparticles

Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
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Received: 30 August 2017 / Revised: 16 October 2017 / Accepted: 18 October 2017 / Published: 23 October 2017
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Abstract

Sensitive and reliable procedures for detecting vestigial antibiotics are of great relevance for water quality monitoring due to the occurrence of such emergent pollutants in the aquatic environment. As such, we describe here research concerning the use of multifunctional nanomaterials combining magnetic and plasmonic components. These nanomaterials have been prepared by decorating magnetite nanoparticles (MNP) with colloidal gold nanoparticles (Au NPs) of distinct particle size distributions. Several analytical conditions were investigated in order to optimize the surface enhanced Raman scattering (SERS) detection of penicillin G (PG) dissolved in water. In particular, the dependence of the SERS signal by using distinct sized Au NPs adsorbed at the MNP was investigated. Additionally, microscopic methods, including Raman confocal microscopy, were employed to characterize the SERS substrates and then to qualitatively detect penicillin G using such substrates. For example, magnetic–plasmonic nanocomposites can be employed for magnetically concentrate analyte molecules and their removal from solution. As a proof of concept, we applied magneto-plasmonic nanosorbents in the removal of aqueous penicillin G and demonstrate the possibility of SERS sensing this antibiotic. View Full-Text
Keywords: SERS; penicillin sensing; magnetic nanosorbents; water quality; gold nanoparticles SERS; penicillin sensing; magnetic nanosorbents; water quality; gold nanoparticles
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Pinheiro, P.C.; Fateixa, S.; Trindade, T. SERS Detection of Penicillin G Using Magnetite Decorated with Gold Nanoparticles. Magnetochemistry 2017, 3, 32.

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