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Poly (3, 4-Ethylenedioxythiophene) - Poly (4-Styrenesulfonate) for Humidity Sensing Using Ink-jet Printing Technique on Flexible Polyimide Substrate

A fully reversible and repeatable flexible capacitive humidity sensor is realized from design concept to reality via an ink-jet deposition system. The humidity sensor is ink-jet fabricated with aqueous Poly (3, 4-ethylenedioxythiophene) - poly (4-styrenesulfonate), PEDOT: PSS ink and Toluene suspend...

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Published in:Sensors & transducers 2009-02, Vol.101 (2), p.52
Main Authors: Lim, Hee C, Hor, Yew Fong, Hor, Yew L, Zunino, James L, Federici, John F
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Language:English
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creator Lim, Hee C
Hor, Yew Fong
Hor, Yew L
Zunino, James L
Federici, John F
description A fully reversible and repeatable flexible capacitive humidity sensor is realized from design concept to reality via an ink-jet deposition system. The humidity sensor is ink-jet fabricated with aqueous Poly (3, 4-ethylenedioxythiophene) - poly (4-styrenesulfonate), PEDOT: PSS ink and Toluene suspended nano Ag particles of 5 nm sized solution. The humidity is monitored by changes in the sensor's effective inter-digitated electrodes capacitance. The humidity sensor exhibits sensitivity with resolution and accuracy of 0.0067 nF/ %RH and 1% RH, respectively, towards the relative environmental moisture concentrations of 32% RH to 100% RH. A fast absorption time of < 1 second and desorption time of approximately 3 second for the humidity sensor is observed. [PUBLICATION ABSTRACT]
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source Publicly Available Content Database; IngentaConnect Journals
subjects Accuracy
Data acquisition systems
Design
Environmental conditions
Environmental monitoring
Humidity
Light emitting diodes
Moisture content
Response time
Scientific apparatus & instruments
Sensors
title Poly (3, 4-Ethylenedioxythiophene) - Poly (4-Styrenesulfonate) for Humidity Sensing Using Ink-jet Printing Technique on Flexible Polyimide Substrate
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