Cyclodextrins enable indirect ultrasensitive Raman detection of polychlorinated biphenyls captured by plasmonic bubbles
Authors: Vassalini I., Bontempi N., Federici S., Ferroni M., Gianoncelli A., Alessandri I.
Autors Affiliation: INSTM, UdR Brescia, Italy; Chemistry for Technologies Laboratory, Mechanical and Industrial Engineering Department (DIMI), University of Brescia, via Branze 38, Brescia, 25123, Italy; Department of Information Engineering (DII), University of Brescia, via Branze 38, Brescia, 25123, Italy; Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, Brescia, 25123, Italy; INO-CNR, via Branze 38, Brescia, 25123, Italy; IMM-CNR, via Gobetti 101, Bologna, 40129, 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-cyclodextrinDOI: 10.1016/j.cplett.2021.138674