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Ion Selective Electrodes for Bioavailable Ions
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Ion Selective Electrodes for Bioavailable Ions

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Chemical Sensors".

Deadline for manuscript submissions: closed (31 October 2014) | Viewed by 29029

Special Issue Editor

Prof. Dr. John F. Cassidy

E-Mail Website
Guest Editor
School of Chemical and Pharmaceutical Sciences Dublin Institute of Technology Kevin Street, Dublin 8 Ireland
Interests: conducting polymers; chemical sensor development; nanoparticles; potentiometry and environmental sensing

Special Issue Information

Dear Colleagues,

This issue of Sensors is dedicated to submissions related to recent advances in the area of potentiometry. This includes work on systems like novel ionophores, ion exchangers, ionic liquids, conducting polymers, single-walled carbon nanotubes, and multi-walled carbon nanotubes used for the modification of ion selective membranes. Micro- and nanoscale potentiometric systems for interrogating individual cells and synaptic clefts are being developed too. Moreover, planar microfabricated systems, solid contact devices, and molecular imprinted systems are also of interest. New views on the theory behind the operation of potentiometric devices in equilibrium and non-equilibrium systems are being sought too. Finally, the biocompatibility and sensor stability of ion selective electrode devices are of particular interest. This issue will prove to be a milestone in ion selective electrode literature.

Prof. Dr. John F Cassidy
Guest Editor

Manuscript Submission Information

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Published Papers (3 papers)

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Research

866 KiB  
Communication
One Single Molecule as a Multifunctional Fluorescent Probe for Ratiometric Sensing of Fe3+, Cr3+ and Colorimetric Sensing of Cu2+
by Yanqiu Yang, Kangkang Yu, Liang Yang, Jun Liu, Kun Li and Shunzhong Luo
Sensors 2015, 15(1), 49-58; https://doi.org/10.3390/s150100049 - 23 Dec 2014
Cited by 21 | Viewed by 7429
Abstract
The reagent Rh-C, incorporating a rhodamine moiety and a coumarin backbone and prepared via click chemistry, was developed as the first single molecule for detecting Cu2+, Fe3+ and Cr3+. Its response to Cu2+ in different solutions [...] Read more.
The reagent Rh-C, incorporating a rhodamine moiety and a coumarin backbone and prepared via click chemistry, was developed as the first single molecule for detecting Cu2+, Fe3+ and Cr3+. Its response to Cu2+ in different solutions is visible to the naked eye and it exhibits a ratiometric fluorescence response to Fe3+ in methanol and Cr3+ in acetonitrile. Full article
(This article belongs to the Special Issue Ion Selective Electrodes for Bioavailable Ions)
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736 KiB  
Article
A New Electrochemical Sensor Based on Task-Specific Ionic Liquids-Modified Palm Shell Activated Carbon for the Determination of Mercury in Water Samples
by Ahmed Abu Ismaiel, Mohamed Kheireddine Aroua and Rozita Yusoff
Sensors 2014, 14(7), 13102-13113; https://doi.org/10.3390/s140713102 - 21 Jul 2014
Cited by 19 | Viewed by 6259
Abstract
In this study, a potentiometric sensor composed of palm shell activated carbon modified with trioctylmethylammonium thiosalicylate (TOMATS) was used for the potentiometric determination of mercury ions in water samples. The proposed potentiometric sensor has good operating characteristics towards Hg (II), including a relatively [...] Read more.
In this study, a potentiometric sensor composed of palm shell activated carbon modified with trioctylmethylammonium thiosalicylate (TOMATS) was used for the potentiometric determination of mercury ions in water samples. The proposed potentiometric sensor has good operating characteristics towards Hg (II), including a relatively high selectivity; a Nernstian response to Hg (II) ions in a concentration range of 1.0 × 10−9 to 1.0 × 10−2 M, with a detection limit of 1 × 10−10 M and a slope of 44.08 ± 1.0 mV/decade; and a fast response time (~5 s). No significant changes in electrode potential were observed when the pH was varied over the range of 3–9. Additionally, the proposed electrode was characterized by good selectivity towards Hg (II) and no significant interferences from other cationic or anionic species. Full article
(This article belongs to the Special Issue Ion Selective Electrodes for Bioavailable Ions)
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471 KiB  
Article
Miniaturizable Ion-Selective Arrays Based on Highly Stable Polymer Membranes for Biomedical Applications
by Mònica Mir, Roberto Lugo, Islam Bogachan Tahirbegi and Josep Samitier
Sensors 2014, 14(7), 11844-11854; https://doi.org/10.3390/s140711844 - 4 Jul 2014
Cited by 27 | Viewed by 14874
Abstract
Poly(vinylchloride) (PVC) is the most common polymer matrix used in the fabrication of ion-selective electrodes (ISEs). However, the surfaces of PVC-based sensors have been reported to show membrane instability. In an attempt to overcome this limitation, here we developed two alternative methods for [...] Read more.
Poly(vinylchloride) (PVC) is the most common polymer matrix used in the fabrication of ion-selective electrodes (ISEs). However, the surfaces of PVC-based sensors have been reported to show membrane instability. In an attempt to overcome this limitation, here we developed two alternative methods for the preparation of highly stable and robust ion-selective sensors. These platforms are based on the selective electropolymerization of poly(3,4-ethylenedioxythiophene) (PEDOT), where the sulfur atoms contained in the polymer covalently interact with the gold electrode, also permitting controlled selective attachment on a miniaturized electrode in an array format. This platform sensor was improved with the crosslinking of the membrane compounds with poly(ethyleneglycol) diglycidyl ether (PEG), thus also increasing the biocompatibility of the sensor. The resulting ISE membranes showed faster signal stabilization of the sensor response compared with that of the PVC matrix and also better reproducibility and stability, thus making these platforms highly suitable candidates for the manufacture of robust implantable sensors. Full article
(This article belongs to the Special Issue Ion Selective Electrodes for Bioavailable Ions)
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