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Potentiometric sensors using cotton yarns, carbon nanotubes and polymeric membranes
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2013 (English)In: The Analyst, ISSN 0003-2654, E-ISSN 1364-5528, Vol. 138, no 18, p. 5208-5215Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2013. Vol. 138, no 18, p. 5208-5215
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-206911DOI: 10.1039/c3an00710cISI: 000323115200006Scopus ID: 2-s2.0-84881647301OAI: oai:DiVA.org:kth-206911DiVA, id: diva2:1094371
Note

QC 20170516

Available from: 2017-05-09 Created: 2017-05-09 Last updated: 2017-05-16Bibliographically approved

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Crespo, Gaston A.
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