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Assembled Au/ZnO Nano-Urchins for SERS Sensing of the Pesticide Thiram.

ABSTRACT: 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.

SUBMITTER: Barbillon G

PROVIDER: S-EPMC8467743 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature

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Assembled Au/ZnO Nano-Urchins for SERS Sensing of the Pesticide Thiram.

Barbillon Grégory G Graniel Octavio O Bechelany Mikhael M

Nanomaterials (Basel, Switzerland) 20210825 9

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 <i>K</i>) 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 asse ...[more]

PMID: 34578490

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