Development of a Perchlorate Chemical Sensor Based on Magnetic Nanoparticles and Silicon Nitride Capacitive Transducer

Najib Ben Messaoud, Abdoullatif Baraket, Cherif Dridi, Naglaa M. Nooredeen, Mohammed Nooredeen Abbas, Joan Bausells, Angelos Streklas, Abdelhamid Elaissari, Abdelhamid Errachid

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)

Abstract

© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim We report in this work the development of a novel capacitance electrochemical sensors based on silicon nitride substrate (Si3N4) chemically modified with a structure of Cobalt phthalocyanine, C,C,C,C-tetracarboxylic acid-Polyacrylamide (Co(II)Pc-PAA). This sensitive layer was tested with and without magnetic nanoparticles (MNP) for perchlorate (ClO4-) detection. The developed chemical sensor with Si3N4/APTES-MNP/Co(II)Pc-PAA structure has shown a better performance when compared to the other structure based on Si3N4/Co(II)Pc-PAA. Contact angle measurements (CAM) and atomic force microscopy (AFM) characterizations have been performed to characterize the functionalization of the chemical sensors surface. Under the optimized structure of the chemical sensor, electrochemical measurements were carried out using Mott-Schottky analysis for ClO4- detection within the large range of 10−10 to 10−4 M with a very low detection limit of 2×10−10 M. The chemical sensor has demonstrated a high selectivity toward ClO4- when compared to other interfering anions such as Cl−, SO42−, and CO32−. The present capacitive chemical sensor is very promising for sensitive and rapid detection of ClO4- for environmental applications.
Original languageEnglish
Pages (from-to)901-909
JournalElectroanalysis
Volume30
Issue number5
DOIs
Publication statusPublished - 1 May 2018

Keywords

  • Capacitive chemical sensor
  • Cobaltphthalocyanine
  • Magnetic nanoparticles
  • Mott-Schottky analysis
  • Perchlorate anions

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