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Issue 22, 2013
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Development of coated-wire silver ion selective electrodes on paper using conductive films of silver nanoparticles

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Abstract

Films of silver nanoparticles are used for the first time as an electrical conductor and ion-to-electron transducer to fabricate coated-wire ion selective electrodes (ISEs) on paper. The film of nano silver ink (nano silver film), synthesized from the reduction of AgNO3 by NaBH4, was screen printed on paper. Transmission electron microscopy showed that the synthesized silver nanoparticles (AgNPs) possessed a spherical shape with diameter ca. 5 nm. Energy-dispersive X-ray spectroscopy supported the purity and good stability of the synthesized AgNPs. Nano silver films were sintered at room temperature, 100 °C and 200 °C. Upon increasing the sintering temperature, atomic force microscopy showed that the size of AgNPs of nano silver films increased, but the sheet resistivity decreased. Silver ISEs were then fabricated from nano silver films and o-NPOE-plasticized polymeric membranes containing benzothiazolyl calix[4]arene (CU1) as ionophore and KTpClPB as anionic site. The performance of the developed Ag-ISEs was investigated by potentiometric measurements, potentiometric water layer tests, current reversal chronopotentiometry and electrochemical impedance spectroscopy. The coated-wire electrode fabricated from the nano silver film sintering at room temperature showed the best characteristics of Ag-ISEs giving a near Nernstian response slope of 59.7 ± 1.0 mV per decade, 10−6 to 10−2 M linear range, detection limit of 4.5 × 10−7 M, long-term potential stability and good reversibility.

Graphical abstract: Development of coated-wire silver ion selective electrodes on paper using conductive films of silver nanoparticles

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Supplementary files

Article information


Submitted
21 Jul 2013
Accepted
07 Sep 2013
First published
09 Sep 2013

Analyst, 2013,138, 6786-6792
Article type
Paper

Development of coated-wire silver ion selective electrodes on paper using conductive films of silver nanoparticles

W. Janrungroatsakul, C. Lertvachirapaiboon, W. Ngeontae, W. Aeungmaitrepirom, O. Chailapakul, S. Ekgasit and T. Tuntulani, Analyst, 2013, 138, 6786
DOI: 10.1039/C3AN01385E

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