A Novel Thin-Film Copper Array Based on an Organic/Inorganic Sensor Hybrid: Microfabrication, Potentiometric Characterization, and Flow-Injection Analysis Application
✍ Scribed by Hassan Arida; Monika Turek; David Rolka; Michael J. Schöning
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 303 KB
- Volume
- 21
- Category
- Article
- ISSN
- 1040-0397
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✦ Synopsis
Abstract
A first step towards the microfabrication of a thin‐film array based on an organic/inorganic sensor hybrid has been realized. The inorganic microsensor part incorporates a sensor membrane based on a chalcogenide glass material (Cu‐Ag‐As‐Se) prepared by pulsed laser deposition technique (PLD) combined with an PVC organic membrane‐based organic microsensor part that includes an o‐xylyene bis(N,N‐diisobutyl‐dithiocarbamate) ionophore. Both types of materials have been electrochemically evaluated as sensing materials for copper(II) ions. The integrated hybrid sensor array based on these sensing materials provides a linear Nernstian response covering the range 1×10^−6^–1×10^−1^ mol L^−1^ of copper(II) ion concentration with a fast, reliable and reproducible response. The merit offered by the new type of thin‐film hybrid array includes the high selectivity feature of the organic membrane‐based thin‐film microsensor part in addition to the high stability of the inorganic thin‐film microsensor part. Moreover, the thin‐film sensor hybrid has been successfully applied in flow‐injection analysis (FIA) for the determination of copper(II) ions using a miniaturized home‐made flow‐through cell. Realization of the organic/inorganic thin‐film sensor hybrid array facilitates the development of a promising sophisticated electronic tongue for recognition and classification of various liquid media.