In this work the ion-selective response of an electrolyte-gated carbon-nanotube field-effect transistor (CNT-FET) towards K(+), Ca(2+) and Cl(-) in the biologically relevant concentration range from 10(-1) M to 10(-6) M is demonstrated. The ion-selective response is achieved by modifying the gate-electrode of an electrolyte-gated CNT-FET with ion-selective membranes, which are selective towards...

The present work aims at investigating the potentialities of implementation electrodialysis for recycling spent lithium-ion batteries. In this work, use highly-selective membrane toward lithium(I) in was investigated to recover selectively cobalt(II), nickel(II) and manganese(II) by means monovalent ion-selective membranes. It shown that presence divalent cations leach solution is responsible a...

A PVC-based membrane containing cerium phosphate was developed. Unlike the cerium phosphate itself that acts as a cation exchanger, the membrane exhibited anion-exchange properties. Therefore, the utility of this compound as a sensory element for detection of molybdate ions was pursued. The response of molybdate selective electrode based on this membrane was perfectly linear in the concentr...

This research presents a novel method to produce successive polymeric ion-selective membrane (ISM) embedded in a microfluidic chip with electrochemical electrodes for detecting ammonia ions. The ISM was formed inside the microchannel utilizing a simple flow-through forming technique. Surface tension force on microstructures is used to trap trace amount of polymer liquid doped with ammonia ionop...

tea is the second most commonly consumed beverage world wide. tea ( camellia sinensis ) is a naturally rich source of fluoride. the quantity of fluoride intake is important in optimizing its dental caries-preventive role. intense concentration of fluoride in tea, can lead to excessive fluoride intake which may cause health problems in turn. the measurement of fluoride intake usually requires in...

Sol-gel and polymeric membrane electrodes, based on thiacalix[4]arene as a neutral carrier, weresuccessfully developed for the detection of VO2+ in aqueous solutions. The sol-gel and PVCmembrane electrodes exhibited linear response with Nernstian slopes of 29.3 and 28.4 mV perdecade, respectively, within the vanadyl ion concentration ranges from 1.0 × 10-6 to 1.0 × 10-1mol dm-3 and from 1.0 × 1...

The design and properties of novel type of solid-contact ionophore-based ion-selective microelectrodes are reported. The microelectrode is based on an insulated needle-shaped metallic wire with an exposed apex. The ion-to-electron transducer is made of poly(3-octylthiophene-2,5-diyl) and placed between an ion-selective membrane and the metallic tip. The ion-selective polyvinyl chloride-based me...

A theory for the interpretation of the operation mechanism of ion-selective membrane electrodes is briefly outlined. The statements are based on the accumulated results concerning the electrochemical and spectrochemical behaviour of ion-selective membranes.