Abstract
Current work presents a detailed study on the synthesis of silver nanoparticles (70 ± 5 nm) functionalized with 4-mercaptobenzoic acid and their interaction with divalent ions (Cu2+, Fe2+, Co2+, Ni2+, Pb2+, Mn2+, Zn2+, Sn2+). The study reveals the morphological changes in the nanoparticles due to interaction with Cu2+, resulting in the formation of larger nanoparticle aggregates. The UV-Vis spectra of the pristine and aggregated nanoparticles are also discussed, providing insights into the changes in their optical properties. These nanoparticles are used to detect divalent ions using surface-enhanced Raman spectroscopy with a detection limit of 2.5 × 10–7 M for Cu2+ and also show a linear response within the 10–3 to 10–7 M concentration range. High selectivity for Cu2+, Fe2+, Co2+, Mn2+, and Pb2+ was also detected. The findings of this study could have significant implications in the field of nanomaterials and environmental chemistry, particularly in the detection and removal of heavy metal ions.
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Acknowledgements
The authors acknowledge Audrius Drabavičius from the Department of Characterisation of Materials Structure of Center for Physical Sciences and Technology for HR-TEM analysis. The authors also thank Andrius Pakalniškis from the Faculty of Chemistry and Geosciences of Vilnius University for SEM analysis.
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Edita Daublytė: Investigation, Validation, Formal analysis. Agnė Zdaniauskienė: Data curation, Visualisation. Martynas Talaikis: Writing, Visualisation. Tatjana Charkova: Conceptualization, Methodology, Writing, Supervision.
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Daublytė, E., Zdaniauskienė, A., Talaikis, M. et al. Synthesis and functionalization of silver nanoparticles for divalent metal ion detection using surface-enhanced Raman spectroscopy. J Nanopart Res 26, 6 (2024). https://doi.org/10.1007/s11051-023-05917-w
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DOI: https://doi.org/10.1007/s11051-023-05917-w