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

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 el...

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Detalles Bibliográficos
Publicado: 2018
Materias:
Bismuth
Carbon Nanotubes
Disposable
Electrochemistry
Paper Electronics
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10400397_v30_n3_p497_Figueredo
http://hdl.handle.net/20.500.12110/paper_10400397_v30_n3_p497_Figueredo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_10400397_v30_n3_p497_Figueredo
record_format dspace
spelling paper:paper_10400397_v30_n3_p497_Figueredo2023-06-08T16:00:41Z 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 Bismuth Carbon Nanotubes Disposable Electrochemistry Paper Electronics 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. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10400397_v30_n3_p497_Figueredo http://hdl.handle.net/20.500.12110/paper_10400397_v30_n3_p497_Figueredo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Bismuth
Carbon Nanotubes
Disposable
Electrochemistry
Paper Electronics
spellingShingle Bismuth
Carbon Nanotubes
Disposable
Electrochemistry
Paper Electronics
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
topic_facet Bismuth
Carbon Nanotubes
Disposable
Electrochemistry
Paper Electronics
description 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. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
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
title_short 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
title_full 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
title_fullStr 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
title_full_unstemmed 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
title_sort 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
publishDate 2018
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10400397_v30_n3_p497_Figueredo
http://hdl.handle.net/20.500.12110/paper_10400397_v30_n3_p497_Figueredo
_version_ 1768545060532518912

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