Title :
Reference electrodes for thick-film sensors
Author :
Prasek, Jan ; Adamek, Martin ; Krivka, Jan ; Szendiuch, Ivan
Author_Institution :
Dept. of Microelectron., Brno Univ. of Technol., Brno, Czech Republic
Abstract :
Paper deals with a problematic of thick-film electrochemical sensors for trace analysis of species or elements in aqueous solutions. A problem of replacement of classical Ag/AgCl reference electrodes by planar thick-film electrodes is discussed here. In this paper there were compared several thick-film reference electrodes with classical ones using the same electrochemical arrangement. Special commercial thick-film pastes and electrochemically fabricated Ag/AgCl layers were used for reference electrodes of thick-film electrochemical sensors and characterized in standard electrochemical solution of potassium ferro-ferricyanide. First results show big difference between tested materials, mainly in shifts of half weave potentials. Moreover with use of screen-printed reference electrodes, there was shown a high output current dependence on the change of electrodes distances.
Keywords :
chemical sensors; electrochemical electrodes; potassium compounds; silver compounds; thick films; Ag-AgCl; aqueous solutions; planar thick film electrode; potassium ferro-ferricyanide; screen printed reference electrodes; thick film electrochemical sensor; thick film sensor reference electrode; Biological materials; Biosensors; Chemicals; Electrodes; Fabrication; Hybrid integrated circuits; Solids; Thick film sensors; Thin film sensors; Thin film transistors;
Conference_Titel :
Electronics Technology, 2008. ISSE '08. 31st International Spring Seminar on
Conference_Location :
Budapest
Print_ISBN :
978-1-4244-3972-0
Electronic_ISBN :
978-1-4244-3974-4
DOI :
10.1109/ISSE.2008.5276620