Cyclodextrins enable indirect ultrasensitive Raman detection of polychlorinated biphenyls captured by plasmonic bubbles

Year: 2021

Authors: Vassalini I., Bontempi N., Federici S., Ferroni M., Gianoncelli A., Alessandri I.

Autors Affiliation: UdR Brescia, INSTM, Brescia, Italy; Univ Brescia, Mech & Ind Engn Dept DIMI, Chem Technol Lab, Via Branze 38, I-25123 Brescia, Italy; Univ Brescia, Dept Informat Engn DII, Via Branze 38, I-25123 Brescia, Italy; Univ Brescia, Dept Mol & Translat Med, Viale Europa 11, I-25123 Brescia, Italy; CNR, INO, Via Branze 38, I-25123 Brescia, Italy; CNR, IMM, Via Gobetti 101, I-40129 Bologna, Italy.

Abstract: Capture, detection and removal of persistent organic pollutants (POPs) from water, air and soil are among the hot topics of research in environmental science. Here we report the first example of indirect ultrasensitive detection of polychlorinated biphenyls in water, obtained by analysing the Raman signals of silver-cyclodextrin supracrystals resulting from drying-induced aggregation of plasmonic alginate bubbles. Principal component analysis allowed to extend the detection limit to the level of 1 ng/L, which is two orders of magnitude lower than that requested by current legislation.

Journal/Review: CHEMICAL PHYSICS LETTERS

Volume: 775      Pages from: 138674-1  to: 138674-5

More Information: This work was partially funded by INSTM and Regione Lombardia (Project grant: “Microsfere adattative per il monitoraggio e l´abbattimento di inquinanti persistenti-MI ADATTI E L´ABBATTI”), Italian Ministry of Agriculture Food and Forestry Policies (MIPAAF, project grant: “RESTART”) and Italian Ministry of University and Research (MUR) through the PRIN project NOMEN (2017MP7F8F).
KeyWords: SERS; Persistent organic pollutants (POPs); Polychlorinated biphenyls (PCBs); Ultrasensitive detection; Preconcentration; Alginate hydrogels; Silver nanoparticles; beta-cyclodextrin
DOI: 10.1016/j.cplett.2021.138674

Citations: 11
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