Highly Reproducible Flexible Ion-selective Electrodes for the Detection of Sodium and Potassium in Artificial Sweat |
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Authors: | Mohammad Rostampour David J. Lawrence Jr Zaaferah Hamid Jade Darensbourg Percy Calvo-Marzal Karin Y. Chumbimuni-Torres |
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Affiliation: | Department of Chemistry, University of Central Florida, Orlando, FL 32816-2366 USA. |
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Abstract: | It is well known that potentiometric sensors provide a versatile, cost-effective, and efficient platform for wearable applications. Unfortunately, mass production and commercialization of such devices is often constrained by the requirement of a calibration step, which is due to the poor sensor-to-sensor reproducibility and the need of conditioning the electrodes in the analyte before use. Herein, we fabricated calibration-free flexible sensors including ion-selective electrode and reference electrode by integrating single-walled carbon nanotubes (SWCNTs) with poly(3-octylthiophene) (POT) and applying on polyethylene terephthalate (PET) substrate. The developed sodium and potassium ion-selective electrodes (ISEs) display excellent repeatability, selectivity, stability as well as high sensor-to-sensor reproducibility, with a standard deviation of as low as 1.0 mV in artificial sweat microliter samples volume. |
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Keywords: | Flexible Sensor Ion-Selective Electrode Calibration-free Sensor Artificial Sweat |
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