platinum counter electrode  (CH Instruments)

Journal: Nanomaterials

Article Title: Calcium Ion Sensors with Unrivaled Stability and Selectivity Using a Bilayer Approach with Ionically Imprinted Nanocomposites

doi: 10.3390/nano15100741

Figure Lengend Snippet: Schematic representation of the fabrication process of the sensing device. ( a ) Commercial silica nanoparticles were functionalized using different coupling agents. In all cases, siloxane groups were employed. ( b ) Functionalized silica nanoparticles were produced, with functional groups covalently attached to their surface. Silica nanoparticles also presented negatively charged sites that improved membrane diffusion processes. ( c ) A plasticized polymeric sensing film with silica nanoparticles was deposited by AACD using a pneumatic nebulizer. ( d ) Sensing film was deposited onto a sensitive layer containing Zr/Si nanoparticles, working as sensing agents. This whole device was deposited onto a 50 nm thin gold contact electrode that had been previously deposited onto a glass substrate.

Article Snippet: For the assessment of the sensitivity of the synthesized electrodes, a three-electrode configuration was employed using a standard Ag/AgCl reference and platinum counter electrodes (Metrohm, Autolab BV, Oss, The Netherlands).

Techniques: Produced, Functional Assay, Membrane, Diffusion-based Assay

Journal: Nanomaterials

Article Title: Calcium Ion Sensors with Unrivaled Stability and Selectivity Using a Bilayer Approach with Ionically Imprinted Nanocomposites

doi: 10.3390/nano15100741

Figure Lengend Snippet: ( a ) Gold electrodes as deposited onto a glass slide. ( b ) Reaction between acetylacetonate and tetraethyl orthosilicate, as described in .

Article Snippet: For the assessment of the sensitivity of the synthesized electrodes, a three-electrode configuration was employed using a standard Ag/AgCl reference and platinum counter electrodes (Metrohm, Autolab BV, Oss, The Netherlands).

Techniques:

Journal: Nanomaterials

Article Title: Calcium Ion Sensors with Unrivaled Stability and Selectivity Using a Bilayer Approach with Ionically Imprinted Nanocomposites

doi: 10.3390/nano15100741

Figure Lengend Snippet: ( a ) Calibration plot of developed electrodes using different concentrations of Ca 2+ and Mg 2+ ions. Results for ionically imprinted ZrSiO x and F-functionalized silica nanocomposite (Template + F-Np), ionically imprinted ZrSiO x and no F-functionalized silica nanocomposite (Template–F-Np), not templated ZrSiO x and F-functionalized silica nanocomposite (No template + F-Np), and not templated ZrSiO x and no F-functionalized silica nanocomposite (No template–F-Np), are shown. F-functionalized silica nanoparticles denote perfluoroalkane-functionalized silica nanoparticle embedded in plasticized PVC film. ( b ) Comparison of sensitivities obtained using full sensor set up, containing ionically imprinted zirconium silicate nanoparticles and pre-concentration layer containing perfluoroalkane-functionalized silica nanoparticles (orange), ionically imprinted zirconium silicate nanoparticles with no perfluoroalkane-functionalized silica nanoparticles incorporated into the PVC membrane (green) and full device with pre-concentration layer with perfluoroalkane-functionalized silica nanoparticles and non-templated zirconium silicate nanoparticles (blue). Highlighted area in orange indicates standard Nernst sensitivity for monovalent ions. ( c ) Selectivity coefficients for K + and Mg 2+ using Fixed Interference Method. ( d ) Potentiometric signal recorded continuously for 1 h to calculate noise rates before and after 3 months of continuous exposure to 0.1 M CaCl 2 .

Article Snippet: For the assessment of the sensitivity of the synthesized electrodes, a three-electrode configuration was employed using a standard Ag/AgCl reference and platinum counter electrodes (Metrohm, Autolab BV, Oss, The Netherlands).

Techniques: Comparison, Concentration Assay, Membrane

Journal: Nanomaterials

Article Title: Calcium Ion Sensors with Unrivaled Stability and Selectivity Using a Bilayer Approach with Ionically Imprinted Nanocomposites

doi: 10.3390/nano15100741

Figure Lengend Snippet: ( a ) Schematic representation of dialysis process. ( b ) Waster dialysate samples were taken at 5, 30, 60, and 120 min, and electrolyte profile was determined by ion-selective electrodes.

Article Snippet: For the assessment of the sensitivity of the synthesized electrodes, a three-electrode configuration was employed using a standard Ag/AgCl reference and platinum counter electrodes (Metrohm, Autolab BV, Oss, The Netherlands).

Techniques: