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Textile Organic Electrochemical Transistors as a Platform for Wearable Biosensors

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ABSTRACT

The development of wearable chemical sensors is receiving a great deal of attention in view of non-invasive and continuous monitoring of physiological parameters in healthcare applications. This paper describes the development of a fully textile, wearable chemical sensor based on an organic electrochemical transistor (OECT) entirely made of conductive polymer (PEDOT:PSS). The active polymer patterns are deposited into the fabric by screen printing processes, thus allowing the device to actually “disappear” into it. We demonstrate the reliability of the proposed textile OECTs as a platform for developing chemical sensors capable to detect in real-time various redox active molecules (adrenaline, dopamine and ascorbic acid), by assessing their performance in two different experimental contexts: i) ideal operation conditions (i.e. totally dipped in an electrolyte solution); ii) real-life operation conditions (i.e. by sequentially adding few drops of electrolyte solution onto only one side of the textile sensor). The OECTs response has also been measured in artificial sweat, assessing how these sensors can be reliably used for the detection of biomarkers in body fluids. Finally, the very low operating potentials (<1 V) and absorbed power (~10−4 W) make the here described textile OECTs very appealing for portable and wearable applications.

No MeSH data available.


Electrical characterization of device in G1 geometry.Id-Vg curves (Vd = −0.3 V) recorded for a textile OECT transistor in configuration G1, dipped in PBS solution.
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f3: Electrical characterization of device in G1 geometry.Id-Vg curves (Vd = −0.3 V) recorded for a textile OECT transistor in configuration G1, dipped in PBS solution.

Mentions: The textile OECT was dipped in PBS (0.1 M phosphate buffer saline pH 5.5) and the transfer and characteristic curves were acquired (Fig. 3 and Fig. S4). At the lowest Vg value, −1 V, the highest Id (in modulus) was recorded as expected31.


Textile Organic Electrochemical Transistors as a Platform for Wearable Biosensors
Electrical characterization of device in G1 geometry.Id-Vg curves (Vd = −0.3 V) recorded for a textile OECT transistor in configuration G1, dipped in PBS solution.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5035988&req=5

f3: Electrical characterization of device in G1 geometry.Id-Vg curves (Vd = −0.3 V) recorded for a textile OECT transistor in configuration G1, dipped in PBS solution.
Mentions: The textile OECT was dipped in PBS (0.1 M phosphate buffer saline pH 5.5) and the transfer and characteristic curves were acquired (Fig. 3 and Fig. S4). At the lowest Vg value, −1 V, the highest Id (in modulus) was recorded as expected31.

View Article: PubMed Central - PubMed

ABSTRACT

The development of wearable chemical sensors is receiving a great deal of attention in view of non-invasive and continuous monitoring of physiological parameters in healthcare applications. This paper describes the development of a fully textile, wearable chemical sensor based on an organic electrochemical transistor (OECT) entirely made of conductive polymer (PEDOT:PSS). The active polymer patterns are deposited into the fabric by screen printing processes, thus allowing the device to actually “disappear” into it. We demonstrate the reliability of the proposed textile OECTs as a platform for developing chemical sensors capable to detect in real-time various redox active molecules (adrenaline, dopamine and ascorbic acid), by assessing their performance in two different experimental contexts: i) ideal operation conditions (i.e. totally dipped in an electrolyte solution); ii) real-life operation conditions (i.e. by sequentially adding few drops of electrolyte solution onto only one side of the textile sensor). The OECTs response has also been measured in artificial sweat, assessing how these sensors can be reliably used for the detection of biomarkers in body fluids. Finally, the very low operating potentials (<1 V) and absorbed power (~10−4 W) make the here described textile OECTs very appealing for portable and wearable applications.

No MeSH data available.