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Provedor de dados:  ArchiMer
País:  France
Título:  Diazonium Salt-Based Surface-Enhanced Raman Spectroscopy Nanosensor: Detection and Quantitation of Aromatic Hydrocarbons in Water Samples
Autores:  Tijunelyte, Inga
Betelu, Stephanie
Moreau, Jonathan
Ignatiadis, Ioannis
Berho, Catherine
Lidgi-guigui, Nathalie
Guenin, Erwann
David, Catalina
Vergnole, Sebastien
Rinnert, Emmanuel
Lamy De La Chapelle, Marc
Data:  2017-06
Ano:  2017
Palavras-chave:  Polynuclear aromatic hydrocarbon (PAH)
Surface-enhanced Raman spectroscopy (SERS)
Diazonium salt
Surface functionalization
Resumo:  Here, we present a surface-enhanced Raman spectroscopy (SERS) nanosensor for environmental pollutants detection. This study was conducted on three polycyclic aromatic hydrocarbons (PAHs): benzo[a]pyrene (BaP), fluoranthene (FL), and naphthalene (NAP). SERS substrates were chemically functionalized using 4-dodecyl benzenediazonium-tetrafluoroborate and SERS analyses were conducted to detect the pollutants alone and in mixtures. Compounds were first measured in water-methanol (9:1 volume ratio) samples. Investigation on solutions containing concentrations ranging from 10−6 g L−1 to 10−3 g L−1 provided data to plot calibration curves and to determine the performance of the sensor. The calculated limit of detection (LOD) was 0.026 mg L−1 (10−7 mol L−1) for BaP, 0.064 mg L−1 (3.2 × 10−7 mol L−1) for FL, and 3.94 mg L−1 (3.1 × 10−5 mol L−1) for NAP, respectively. The correlation between the calculated LOD values and the octanol-water partition coefficient (Kow) of the investigated PAHs suggests that the developed nanosensor is particularly suitable for detecting highly non-polar PAH compounds. Measurements conducted on a mixture of the three analytes (i) demonstrated the ability of the developed technology to detect and identify the three analytes in the mixture; (ii) provided the exact quantitation of pollutants in a mixture. Moreover, we optimized the surface regeneration step for the nanosensor.
Tipo:  Text
Idioma:  Inglês

Editor:  Mdpi Ag
Formato:  application/pdf
Fonte:  Sensors (1424-8220) (Mdpi Ag), 2017-06 , Vol. 17 , N. 6 , P. 1198 (1-17)
Direitos:  2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (


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