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Title
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Potentiometric sensors using cotton yarns, carbon nanotubes and polymeric membranes
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Author
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Abstract
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| A simple and generalized approach to build electrochemical sensors for wearable devices is presented. Commercial cotton yarns are first turned into electrical conductors through a simple dyeing process using a carbon nanotube ink. These conductive yarns are then partially coated with a suitable polymeric membrane to build ion-selective electrodes. Potentiometric measurements using these yarn-potentiometric sensors are demonstrated. Examples of yarns that can sense pH, K+ and NH4+ are presented. In all cases, these sensing yarns show limits of detection and linear ranges that are similar to those obtained with lab-made solid-state ion-selective electrodes. Through the immobilization of these sensors in a band-aid, it is shown that this approach could be easily implemented in a wearable device. Factors affecting the performance of the sensors and future potential applications are discussed. |
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Language
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English
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Source (journal)
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The analyst. - Cambridge, 1876, currens
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Publication
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Cambridge
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2013
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ISSN
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0003-2654
[print]
1364-5528
[online]
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DOI
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10.1039/C3AN00710C
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Volume/pages
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138
:18
(2013)
, p. 5208-5215
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ISI
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000323115200006
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Pubmed ID
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23775189
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Full text (Publisher's DOI)
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