Photopatternable and moisture-stable PEDOT:PSS/PEG hybrid thin-film for flexible and wearable humidity sensing

Zijie Zhu, Ruya Li, Tingrui Pan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Degradation and delamination have been technically challenging for poly(3,4-ethylenedioxythiophene): polystyrene sulfonate) (PEDOT:PSS) thin-film processing due to environmental humidity. To overcome this problem, we introduced a one-step photolithographic method to both pattern and link a PEDOT:PSS film onto a PEG layer as a hybrid thin-film structure on a flexible substrate, which exhibited excellent long-Term moisture stability (10 days) and high lithographic resolution (2 urn). Mechanical characterizations (bending and tensile tests) illustrated strong adhesions between the PEDOT:PSS and PEG layers as well as between the hybrid thin-film and substrate. Moreover, the hybrid moisture-Absorbable film showed a quick response of its permittivity to environmental humidity variations, in which patterned PEDOT:PSS layer served as an electrode and the PEG layer as a moisture sensing element. As demonstrations, perspiration tracking over various parts of the body surface as well as breath rate measurement were successfully carried out, which illustrated the potential utility of this stable hybrid thin-film for emerging flexible and wearable humidity sensing applications.

Original languageEnglish (US)
Title of host publication2017 IEEE 12th International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages318-322
Number of pages5
ISBN (Electronic)9781509030590
DOIs
StatePublished - Aug 25 2017
Event12th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017 - Los Angeles, United States
Duration: Apr 9 2017Apr 12 2017

Other

Other12th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017
CountryUnited States
CityLos Angeles
Period4/9/174/12/17

Keywords

  • breath rate measurement
  • humidity sensor
  • hybrid thin-film
  • moisture stability
  • one-step photopatterning
  • PEDOT:PSS
  • perspiration tracking

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Electronic, Optical and Magnetic Materials
  • Instrumentation

Fingerprint Dive into the research topics of 'Photopatternable and moisture-stable PEDOT:PSS/PEG hybrid thin-film for flexible and wearable humidity sensing'. Together they form a unique fingerprint.

  • Cite this

    Zhu, Z., Li, R., & Pan, T. (2017). Photopatternable and moisture-stable PEDOT:PSS/PEG hybrid thin-film for flexible and wearable humidity sensing. In 2017 IEEE 12th International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2017 (pp. 318-322). [8017033] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NEMS.2017.8017033