The response of citrate functionalised gold and silver nanoparticles to the addition of heavy metal ions

Add time:09/24/2019    Source:sciencedirect.com

1HypothesisCitrate functionalised gold nanoparticles (AuNPs) have been shown to be effective heavy metal sensors, as their optical spectra quantitatively shifts upon metal-citrate interaction. The speciation and molecular orientation of citrate molecules absorbed on the surfaces of bulk materials are found to be dependent on the substrate material used. It is expected that substituting gold for another nanomaterial should give the citrate molecules at the surface different speciation and molecular orientation, thus providing different citrate/metal interactions and responses.

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