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• W2783802106 startingPage "497" @default.
• W2783802106 abstract "Modification of cellulosic paper with carbon nanotubes (CNT) was studied for the development of electronic and analytical devices. Interesting results were published by using a CNT aqueous solution and the capillary forces of filter paper to make conductive tracks, supercapacitors, potentiometric electrodes and chemometric sensors. In this report, we show for the first time an electrochemical characterization of CNT-CS-SDS paper electrodes constructed with an ink containing optimized proportions of multi-wall CNT, chitosan (CS) and sodium dodecyl sulfate (SDS), and we compared our data with CNT-SDS paper electrodes constructed with a previously reported ink. We achieved better reversibility (ΔE=131±14 mV, CVs) and reproducibility (RSD=3.63 %) with CNT-CS-SDS paper electrodes, when compared to CNT-SDS paper electrodes (ΔE=249±7 mV; RSD=6.8 %) used as controls. When electrodes were fold at 90° angle, CNT-CS-SDS paper electrodes showed lower RSD than CNT-SDS paper electrodes, 8.43 % and 21.5 % respectively. These results are in concordance with SEM analysis indicating a dense CS film in CNT-CS-SDS paper electrodes. As a proof of concept, we determine dopamine concentration by DPV in the presence of ascorbic and uric acids, the limit of detection calculated was 6.32 μM. Moreover, a bismuth-film was prepared by in situ plating of Bi into CNT-CS-SDS paper electrodes. ASV allowed us to detect Pb in the presence of Bi (10–200 ppb) with a limit of detection of 6.74 ppb." @default.
• W2783802106 created "2018-01-26" @default.
• W2783802106 creator A5002600651 @default.
• W2783802106 creator A5006156473 @default.
• W2783802106 creator A5064275199 @default.
• W2783802106 date "2018-01-12" @default.
• W2783802106 modified "2023-10-07" @default.
• W2783802106 title "Low Cost Layer by Layer Construction of CNT/Chitosan Flexible Paper-based Electrodes: A Versatile Electrochemical Platform for Point of Care and Point of Need Testing" @default.
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