High-sensitivity humidity sensor utilizing PEDOT/PSS printed quartz crystal microbalance

Jaruwongrungsee, Kata; Sriprachuabwong, Chakrit; Sappat, Assawapong; Wisitsoraat, Anurat; Phasukkit, Pattarapong; Sangworasil, Manas; Tuantranont, Adisorn

doi:10.1109/ECTICON.2011.5947772

High-sensitivity humidity sensor utilizing PEDOT/PSS printed quartz crystal microbalance

Author(s)

Jaruwongrungsee, Kata

Sriprachuabwong, Chakrit

Sappat, Assawapong

Wisitsoraat, Anurat

Phasukkit, Pattarapong

Sangworasil, Manas

Tuantranont, Adisorn

Date Issued

August 12, 2011

Type

Conference Paper

DOI

10.1109/ECTICON.2011.5947772

Abstract

In this work, quartz crystal microbalance humidity sensor was fabricated by inkjet printing technique. Poly (3, 4-ethylenedioxythiophene)/poly-styrene- sulfonic acid (PEDOT/PSS), one of the most widely used polymer composites, was printed on QCM electrode as sensing layer using Dimatrix material inkjet printer. The main advantage of this coating method is its high precision of solution coating with accurately controlled volume and area. The printed layer was varied from 1 to 20 layers. With 20 PEDOT/PSS printed layers, the humidity sensitivity is found increased by more than three orders of magnitude compared to uncoated QCM. In addition, the PEDOT/PSS coated QCM exhibits fast humidity detection with short response and recovery times. Thus, the PEDOT/PSS printed on the QCM electrode is an effective way to improve humidity-sensing characteristic of QCM. © 2011 IEEE.

Citation

Ecti Con 2011 8th Electrical Engineering Electronics Computer Telecommunications and Information Technology Ecti Association of Thailand Conference 2011, 66-69, 2011