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Article Dans Une Revue Beilstein Journal of Nanotechnology Année : 2020

Highly sensitive detection of estradiol by a SERS sensor based on TiO 2 covered with gold nanoparticles

Résumé

We propose the use of gold nanoparticles grown on the surface of nanoporous TiO 2 films as surface-enhanced Raman scattering (SERS) sensors for the detection of 17β-estradiol. Gold deposition on top of a TiO 2 surface leads to the formation of nanoparticles the plasmonic properties of which fulfil the requirements of a SERS sensor. The morphological and optical properties of the surface were investigated. Specifically, we demonstrate that the TiO 2 background pressure during pulsed laser deposition and the annealing conditions offer control over the formation of Au nanoparticles with different sizes, shapes and distributions, yielding a versatile sensor. We have exploited the surface for the detection of 17β-estradiol, an emerging contaminant in environmental waters. We have found a limit of detection of 1 nM with a sensitivity allowing for a dynamic range of five orders of magnitude (up to 100 µM).
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Dates et versions

hal-03246424 , version 1 (02-06-2021)

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Andrea Brognara, Ili Mohamad Ali Nasri, Beatrice Bricchi, Andrea Li Bassi, Caroline Gauchotte-Lindsay, et al.. Highly sensitive detection of estradiol by a SERS sensor based on TiO 2 covered with gold nanoparticles. Beilstein Journal of Nanotechnology, 2020, 11, pp.1026-1035. ⟨10.3762/bjnano.11.87⟩. ⟨hal-03246424⟩
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