abstract
Dendrimers are polymers with well-defined architectures and tunable chemistry, which make them useful in a number of applications. Herein, the chemistry of poly(amido)amine (PAMAM) dendrimers with different functional groups was explored to produce a variety of plasmonic systems based on Au colloidal nanoparticles. The resulting systems present long-term colloidal stability and were investigated as sensitive platforms for surface-enhanced Raman scattering (SERS). The application of these SERS platforms for the detection of water trace pollutants, was explored through the analysis of selected pesticides. Noteworthy, dendrimer coated Au nanoparticles with tunable properties such as size, shape and surface chemistry, were obtained by varying the dendrimer chemical properties. The surface chemistry of PAMAM capped Au colloids was explored in order to produce target selective SERS substrates for pesticide detection, that allowed to reach detection limits down to 10 nm.
keywords
ENCAPSULATED AU NANOPARTICLES; PAMAM DENDRIMERS; METAL NANOCLUSTERS; ORGANIC POLLUTANTS; RAMAN; REMOVAL; PH; EXTRACTION; RESONANCE; CATALYSIS
subject category
Chemistry
authors
Fernandes, T; Fateixa, S; Nogueira, HIS; Daniel-da-Silva, AL; Trindade, T
our authors
Ana Luísa Daniel da Silva
Principal Researcher
Helena Isabel Seguro Nogueira
Assistant Professor with Aggregation
João Tiago Moniz Fernandes
PhD Student
Sara Fateixa
Junior Researcher
Tito Trindade
Full professoracknowledgements
This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, FCT Ref. UID/CTM/50011/2019, financed by national funds through the FCT/MCTES. Tiago Fernandes thanks Fundacao para a Ciencia e Tecnologia (FCT) for the PhD grant SFRH/BD/130934/2017. The costs resulting from the FCT hirings is funded by national funds (OE), through FCT, I. P. in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29. Ana L. Daniel-da-Silva acknowledges FCT for the research contract under the Program Investigador FCT 2014.