Optical monitoring of sweat pH by a textile fabric wearable sensor based on covalently bonded litmus-3-glycidoxypropyltrimethoxysilane coating

A wearable, flexible and non-toxic pH sensor was fabricated by assembling a cotton fabric treated with an organically modified silicate (ORMOSIL) together with a miniaturized and low-power electronics with wireless interface. The pH sensible ORMOSIL was obtained via sol–gel by using litmus, a non-to...

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Bibliographic Details
Published inSensors and actuators. B, Chemical Vol. 222; pp. 213 - 220
Main Authors Caldara, Michele, Colleoni, Claudio, Guido, Emanuela, Re, Valerio, Rosace, Giuseppe
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.2016
Subjects
Electronics
Fabrics
Litmus dye
Monitoring
Optoelectronic read out
pH sensors
Sensors
Sol–gel
Sweat
Textiles
Wearable
Wearable sensor
pH sensors
Optoelectronic read out
Wearable sensor
Sol–gel
Litmus dye
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Summary:A wearable, flexible and non-toxic pH sensor was fabricated by assembling a cotton fabric treated with an organically modified silicate (ORMOSIL) together with a miniaturized and low-power electronics with wireless interface. The pH sensible ORMOSIL was obtained via sol–gel by using litmus, a non-toxic pH indicator, and 3-glycidoxypropyltrimethoxysilane (GPTMS) as siloxane precursor. The chemical structure of the ORMOSIL was analyzed by FTIR and UV–vis spectroscopy. The electronics has been first characterized in a standalone fashion, and successively it has been coupled to the smart fabric, in the laboratory and in preliminary on-body trials. A sweat real-time monitoring is particularly attractive for healthcare, fitness and wellness areas.
Bibliography:ObjectType-Article-1
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ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2015.08.073