Focusing on ionophore-based ion-selective electrodes (ISEs), this work highlights recent advances in increasing sensor sensitivity by converting potentiometric response to a variety of electrical and optical signals including charge, current, luminescence, color change.

A bimodular planar O2 sensor was fabricated using NiO nanoparticles (NPs) thin film coated yttria-stabilized zirconia (YSZ) substrate. The thin film was prepared by radio frequency (r.f.) magnetron sputtering of NiO on YSZ substrate, followed by high temperature sintering. The surface morphology of NiO NPs film was characterized by atomic force microscope (AFM) and scanning electron microscope ...

Electrodes for scanning ion-selective potentiometric microscopy (or potentiometric SECM) were developed and used to image local concentration profiles of NH4+, K+, and Zn2' ions. Neutral carrier-based micropipet ionselective electrodes with high spatial resolution (-2-3 pm) and fast response time (-300 ms) were fabricated and employed as potentiometric SECM tips, and highresolution ion-selectiv...

in the present study, we investigate the potentiometric behavior of cu2+ carbon paste electrodes based on two mercapto compounds 2-ethylmino-5-mercapto-1,3,4-thiadiazole (eamt) and 2-acetylamino-5-mercapto-1,3,4-thiadiazole (aamt) self-assembled on gold nano-paricle (gnp) as ionophore. then, the results obtained from the modified electrodes are compared. the self-assembled ionophores exhibit a ...

To improve the spatial resolution of the light-addressable potentiometric sensor (LAPS), it is necessary to reduce the thickness of the semiconductor layer, which, however, causes a problem of the mechanical strength of the sensor plate. In this study, a thin-film LAPS was fabricated with amorphous silicon (a-Si) deposited on a transparent glass substrate. The current-voltage characteristics an...

A potentiometric sensor device based on screen-printed Nasicon films was investigated. In order to transfer the promising sensor concept of an open sodium titanate reference to thick film technology, "sodium-rich" and "sodium-poor" formulations were compared. While the "sodium-rich" composition was found to react with the ion conducting Nasicon during thermal treatment, the "sodium-poor" refere...

A novel potentiometric ion-selective PVC membrane sensor for analysis of atorvastatin (AT) in pharmaceutical preparations based on atorvastatin-(tetraphenyl borate), (AT-(TPB)2) as sensing element, tetraphenyl borate as additive and tris-2-ethyl-hexyl phosphate (TOP) as plasticizer solvent was prepared. The electrode shows a good Nernestian response over the concentration range of 0.09–5586 µ...

In this work, a novel Zr02+ PVC-based membrane sensor based on 4,7,13,16,21,24-hexa oxa-1,10- diazabicyclo[8,8,8]- hexa cosane (HODBHC) as a new ionophore is presented. The sensor displays a linear dynamic rangebetween 1.0x 10-1 and 1.0x10 6 M, with a near Nernstian slope of 29.9 ± 0.4 mV per decade in an acidic solution(pH=1). The limit of detection is 8.0 x 1 0 7 M. The electrodes possess adv...

A new polyvinyl choloride (PVC) membrane sensor for cerium(III) was prepared based on 4,13-didecyl-1,7,10,16-tetraoxa-4,13-diazacyclooctadecane (kryptofix22DD) as an ionophore. The sensorexhibites a linear concentration range of 1.0×10-6 to 1.0×10-1 M, with aNernstian slope of 18.0±1.0 mV/decade, and a detection limit of 9.7×10-7M. It has a fast response time (5 s) and can be used for two month...

A novel potentiometric ion-selective PVC membrane sensor for analysis of atorvastatin (AT) in pharmaceutical preparations based on atorvastatin-(tetraphenyl borate), (AT-(TPB)2) as sensing element, tetraphenyl borate as additive and tris-2-ethyl-hexyl phosphate (TOP) as plasticizer solvent was prepared. The electrode shows a good Nernestian response over the concentration range of 0.09–5586 µ...