Chemical Strategies for Dendritic Magneto-plasmonic Nanostructures Applied to Surface-Enhanced Raman Spectroscopy

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 (Fe3O4 : 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.

keywords

IRON-OXIDE NANOPARTICLES; BIOMEDICAL APPLICATIONS; PAMAM DENDRIMERS; FUNCTIONALIZATION; RESONANCE; NANOCOMPOSITE; MICROSPHERES; FLUORESCENCE; FABRICATION; PARTICLES

subject category

Chemistry

authors

Fernandes, T; Nogueira, HIS; Amorim, CO; Amaral, JS; Daniel-da-Silva, AL; Trindade, T

our authors

acknowledgements

T.F. thanks the FundacAo para a Ciencia e Tecnologia (FCT) for PhD grant SFRH/BD/130934/2017. A.L.D.-d.-S. acknowledges FCT for a research contract under the Program Investigador FCT 2014. This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 and LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC).

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".