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

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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Bibliographic Details
Main Authors: Hee C. LIM, Yew Fong HOR, Yew L. HOR, James L. ZUNINO III, John F. FEDERICI
Format: Article
Language:English
Published: IFSA Publishing, S.L. 2009-02-01
Series:Sensors & Transducers
Subjects:
Flexible substrate
Humidity sensor
Conducting polymer
Online Access:http://www.sensorsportal.com/HTML/DIGEST/february_09/P_386.pdf
Description
Summary: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.
ISSN:2306-8515
1726-5479

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