1Université de Monastir, LIMA, Faculté des Sciences de Monastir, 5019 Monastir, Tunisia
2Université de Sousse, ISSAT de Sousse, Cité Ettafala, 4003 Ibn Khaldoun Sousse, Tunisia
3Centre for Research on Microelectronics and Nanotechnology of Sousse, Technopole of Sousse B.P334 Sahloul 6 4034 Sousse, Tunisia
4Analytical Laboratory, Department of Applied Organic Chemistry, National Research Centre, Cairo, Egypt
5Centro National of Microelectronica (IMB-CSIC), Campus UAB, 08193 Bellaterra, Barcelona, Spain
6Institut des Sciences Analytiques (ISA), Université Lyon, Université de Claude Bernard Lyon 1, UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France
Received: 30 Jul 2014 – Revised: 20 Oct 2014 – Accepted: 11 Dec 2014 – Published: 16 Jan 2015
Abstract. We report the development of a chemical sensor based on a Co(II) phthalocyanine acrylate polymer (Co(II)Pc-AP) for perchlorate anion detection. We have used two types of transducers, silicon nitride (Si3N4) and hafnium oxide (HfO2). The adhesion of the Co(II)Pc-AP on different transducers and their surface qualities have been studied by contact angle measurements. We have studied the pH effect on Al/Si/SiO2/HfO2/electrolyte capacitance values for different phosphate buffer solutions (PBS). This optimization step has allowed a sensitivity value of about 44 mV decade−1 towards H+ ions. The fabricated sensors based on Si3N4 and HfO2 transducers functionalized with a Co(II)Pc-AP membrane have been characterized by C(V) measurements for different perchlorate concentrations (from 10−7 to 10−2 M). The sensor developed with the HfO2 transducer shows better performances compared to that based on Si3N4: a larger detection range (10−7 to 10−2 and 10−3 to 10−2 M, respectively) and lower detection limits (10−7 and 10−3 M). The specificities of our perchlorate sensor have been tested for some interfering ions (nitrate, sulfate and carbonate).
Braik, M., Dridi, C., Ben Ali, M., Ali, M., Abbas, M., Zabala, M., Bausells, J., Zine, N., Jaffrezic-Renault, N., and Errachid, A.: Development of a capacitive chemical sensor based on Co(II)-phthalocyanine acrylate-polymer/HfO2/SiO2/Si for detection of perchlorate, J. Sens. Sens. Syst., 4, 17-23, doi:10.5194/jsss-4-17-2015, 2015.