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AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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STUDIA CHEMIA - Ediţia nr.Special Issue 2 din 2009 | |||||||
Articol: |
COATED-WIRE TYPE ION SENSITIVE ELECTRODES BASED ON NANOSTRUCTURED ATO THIN FILM. Autori: . |
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Rezumat: The functional performances of some cation and anion sensitive self-made, coated-wire type ISEs (ion selective electrodes), where the conventional metallic conductor was replaced by nanostructured ATO (antimony doped tin dioxide) thin film are presented. Two different PVC based membranes, cation and anion sensitive, respectively, were coated on ATO films prepared by the sol-gel technique. By using AFM (Atomic Force Microscopy), EIS (Electrochemical Impedance Spectroscopy) and sheet resistance measurements the film nanostructured morphology and the good electrical conductivity, respectively, were established. The cation sensitive ISE shows the best functional characteristics towards K+: linear response range: 5´10-5-10-1ML-1, sensitivity: 56±1 DmV/DpC, detection limit: 2´10-5 ML-1. The anion sensitive ISE shows the best functional characteristics towards : linear response range: 3´10-5-10-1ML-1, sensitivity: 55±1DmV/DpC, detection limit: 1,8´10-5ML-1. The life time of the ISEs was 8 days.
Keywords: coated-wire type ISE, ATO, sol-gel. |
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