Plasmonic Sensor Based on Interaction between Silver Nanoparticles and Ni2+ or Co2+ in Water

Nanomaterials
Federico MochiPaolo Prosposito

Abstract

Silver nanoparticles capped with 3-mercapto-1propanesulfonic acid sodium salt (AgNPs-3MPS), able to interact with Ni2+ or Co2+, have been prepared to detect these heavy metal ions in water. This system works as an optical sensor and it is based on the change of the intensity and shape of optical absorption peak due to the surface plasmon resonance (SPR) when the AgNPs-3MPS are in presence of metals ions in a water solution. We obtain a specific sensitivity to Ni2+ and Co2+ up to 500 ppb (part per billion). For a concentration of 1 ppm (part per million), the change in the optical absorption is strong enough to produce a colorimetric effect on the solution, easily visible with the naked eye. In addition to the UV-VIS characterizations, morphological and dimensional studies were carried out by transmission electron microscopy (TEM). Moreover, the systems were investigated by means of dynamic light scattering (DLS), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and high-resolution X-ray photoelectron spectroscopy (HR-XPS). On the basis of the results, the mechanism responsible for the AgNPs-3MPS interaction with Ni2+ and Co2+ (in the range of 0.5⁻2.0 ppm) looks like based on the coordinati...Continue Reading

References

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Citations

Aug 30, 2018·Materials·Luca BurrattiPaolo Prosposito
Mar 3, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Marianne MarchioniAurélien Deniaud
Jan 29, 2021·Mikrochimica Acta·Amirmostafa Amirjani, Erfan Rahbarimehr
Apr 6, 2021·Colloids and Surfaces. B, Biointerfaces·Sara CerraIlaria Fratoddi
Jul 23, 2021·Nanoscale Research Letters·Jesús Mauro Adolfo Villalobos-NoriegaRamón A Iñiguez-Palomares

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Methods Mentioned

BETA
surface
surface plasmon resonance
dynamic
X-ray
infrared spectroscopy

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