Detection of per- and polyfluoroalkyl water contaminants with multiplexed 4D microcavities sensor

  • The per- and polyfluoroalkyl substances (PFAS) constitute a group of organofluorine chemicals treated as the emerging pollutants and currently are of particularly acute concern. These compounds have been employed intensively as surfactants over multiple decades and are already to be found in surface and ground waters at amounts sufficient to have an effect on the human health and ecosystems. Because of the carbon-fluorine bonds the PFAS have an extreme environmental persistence and their negative impact accumulates with further production and penetration into the environment. In Germany alone, more than thousands sites have been identified to be contaminated with PFAS and thus timely detection of PFAS residues is becoming a high-priority task. In this paper we report on the high performance optical detection method based on whispering gallery modes microcavities applied for the first time for detection of the PFAS contaminants in aqueous solutions. A self-sensing boosted 4D microcavity fabricated with two-photon polymerization is employed as an individual sensing unit. On example of the multiplexed imaging sensor with multiple hundreds of simultaneously interrogated microcavities we demonstrate the possibility to detect the PFAS chemicals representatives at the level of down to 1 ppb.

Download full text files

Export metadata

Additional Services

Share in Twitter Search Google Scholar
Author:Anton SaetchnikovORCiDGND, Elina A. TcherniavskaiaGND, Vladimir SaetchnikovGND, Andreas OstendorfORCiDGND
Parent Title (English)
Document Type:Article
Date of Publication (online):2024/03/13
Date of first Publication:2023/06/15
Publishing Institution:Ruhr-Universität Bochum, Universitätsbibliothek
Tag:Open Access Fonds
Article Processing Charge funded by the Deutsche Forschungsgemeinschaft (DFG) and the Open Access Publication Fund of Ruhr-Universität Bochum.
Institutes/Facilities:Lehrstuhl für Laseranwendungstechnik
open_access (DINI-Set):open_access
Licence (English):License LogoCreative Commons - CC BY-NC-SA 4.0 - Attribution-NonCommercial-ShareAlike 4.0 International