Premium
Development of a Perchlorate Chemical Sensor Based on Magnetic Nanoparticles and Silicon Nitride Capacitive Transducer
Author(s) -
Messaoud Najib Ben,
Baraket Abdoullatif,
Dridi Cherif,
Nooredeen Naglaa. M.,
Abbas Mohammed Nooredeen,
Bausells Joan,
Streklas Angelos,
Elaissari Abdelhamid,
Errachid Abdelhamid
Publication year - 2018
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201700824
Subject(s) - materials science , capacitive sensing , silicon nitride , nanoparticle , selectivity , surface modification , detection limit , silicon , analytical chemistry (journal) , chemical engineering , nanotechnology , optoelectronics , chemistry , organic chemistry , chromatography , computer science , engineering , catalysis , operating system
We report in this work the development of a novel capacitance electrochemical sensors based on silicon nitride substrate (Si 3 N 4 ) 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 ( ClO 4 - ) detection. The developed chemical sensor with Si 3 N 4 /APTES‐MNP/Co(II)Pc‐PAA structure has shown a better performance when compared to the other structure based on Si 3 N 4 /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 ClO 4 - 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 ClO 4 - when compared to other interfering anions such as Cl − , SO 4 2− , and CO 3 2− . The present capacitive chemical sensor is very promising for sensitive and rapid detection of ClO 4 - for environmental applications.