Assembled Au/ZnO Nano-Urchins for SERS Sensing of the Pesticide Thiram.
Grégory BarbillonOctavio GranielMikhael BechelanyPublished in: Nanomaterials (Basel, Switzerland) (2021)
In this paper, we are relating a significant improvement of the SERS effect achieved with assembled Au/ZnO nano-urchins. This improvement is realized thanks to an excellent capacity of adsorption (denoted K) for thiram molecules on these plasmonic nano-urchins, which is a key point to be taken into account for obtaining a SERS spectrum. Moreover, this outlook may be employed for different types of plasmonic substrates and for a wide number of molecules. We studied the capacity of the assembled Au/ZnO nano-urchins to be sensitive to the pesticide thiram, which adsorbs well on metals via the metal-sulfur bond. For the thiram detection, we found a limit concentration of 10 pM, a value of this capacity of adsorption (K) of 9.5 × 106 M-1 and a factor of analytical enhancement equal to 1.9 × 108.
Keyphrases
- sensitive detection
- quantum dots
- reduced graphene oxide
- gold nanoparticles
- visible light
- label free
- loop mediated isothermal amplification
- room temperature
- risk assessment
- energy transfer
- raman spectroscopy
- particulate matter
- air pollution
- single molecule
- human health
- mass spectrometry
- heavy metals
- ionic liquid
- real time pcr
- climate change
- health risk assessment