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Chemical Strategies for Dendritic Magneto‐plasmonic Nanostructures Applied to Surface‐Enhanced Raman Spectroscopy
Author(s) -
Fernandes Tiago,
Nogueira Helena I. S.,
Amorim Carlos O.,
Amaral João S.,
DanieldaSilva Ana L.,
Trindade Tito
Publication year - 2022
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202202382
Subject(s) - plasmon , nanotechnology , surface enhanced raman spectroscopy , materials science , context (archaeology) , raman scattering , raman spectroscopy , nanostructure , optoelectronics , physics , optics , paleontology , biology
Abstract Chemical analyses in the field using surface‐enhanced Raman scattering (SERS) protocols are expected to be part of several analytical procedures applied to water quality monitoring. To date, these endeavors have been supported by developments in SERS substrate nanofabrication, instrumentation portability, and the internet of things. Here, we report distinct chemical strategies for preparing magneto‐plasmonic (Fe 3 O 4 : Au) colloids, which are relevant in the context of trace‐level detection of water contaminants due to their inherent multifunctionality. The main objective of this research is to investigate the role of poly(amidoamine) dendrimers (PAMAMs) in the preparation of SERS substrates integrating both functionalities into single nanostructures. Three chemical routes were investigated to design magneto‐plasmonic nanostructures that translate into different ways for assessing SERS detection by using distinct interfaces. Hence, a series of magneto‐plasmonic colloids have been characterized and then assessed for their SERS activity by using a model pesticide (thiram) dissolved in aqueous samples.