Miniaturized, Planar Ion-selective Electrodes Fabricated by Means of Thick-film Technology

Abstract

Various planar technologies are employed for developing solid-state sensors having low cost, small size and high reproducibility; thin-and thick-film technologies are most suitable for such productions. Screen-printing is especially suitable due to its simplicity, low-cost, high reproducibility and efficiency in large-scale production. This technology enables the deposition of a thick layer and allows precise pattern control. Moreover, this is a highly economic technology, saving large amounts of the used inks. In the course of repetitions of the film-deposition procedure there is no waste of material due to additivity of this thick-film technology. Finally, the thick films can be easily and quickly deposited on inexpensive substrates. In this contribution, thick-film ion-selective electrodes based on ionophores as well as crystalline ion-selective materials dedicated for potentiometric measurements are demonstrated. Analytical parameters of these sensors are comparable with those reported for conventional potentiometric electrodes. All mentioned thick-film strip electrodes have been totally fabricated in only one, fully automated thickfilm technology, without any additional manual, chemical or electrochemical steps. In all cases simple, inexpensive, commercially available materials, i.e. flexible, plastic substrates and easily cured polymer-based pastes were used.

Recent trends in potentiometric sensor arrays—A review

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“…Detailed information on ET systems may be found in recent review articles [24][25][26][27]. Application of modern technologies, like microelectronics or screen-printing technique, to sensor fabrication [28] permits to integrate several sensors in silicon [29] or on some other solid support [15]. In this case we speak of an integrated sensor array.…”

New Trends in Biosensors for Water Monitoring

“…where E 0 is the selective electrode constant, a A n+ is the activity of A n+ ion Significant efforts have been made during the past decade to improve the robustness of conventional ISEs, widen the range of ions detected and miniaturize the electrodes (Bakker et al, 2008;Tymecki et al, 2006). FEDs belong to the second class of potentiometric transducers and include ion-sensitive field-effect transistors (ISFETs) and light-addressable potentiometric sensors (LAPSs).…”

Design and Fabrication of Low Cost Thick Film pH Sensor using Silver Chlorinated Reference Electrodes with Integrated Temperature Sensor

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