Cited 10 time in webofscience Cited 11 time in scopus

Enhancing the conductivity of PEDOT:PSS films for biomedical applications via hydrothermal treatment

Title
Enhancing the conductivity of PEDOT:PSS films for biomedical applications via hydrothermal treatment
Authors
Jeong, WooseongGwon, GihyeokHa, Jae-HyunKim, DonghaEom, Ki-JooPark, Ju HyangKang, Seok JuKwak, BongseopHong, Jung-IlLee, ShinbuhmHyun, Dong ChoonLee, Sungwon
DGIST Authors
Hong, Jung-IlLee, ShinbuhmLee, Sungwon
Issue Date
2021-01
Citation
Biosensors and Bioelectronics, 171, 112717
Type
Article
Article Type
Article
Author Keywords
PEDOT:PSSConductive polymerConductivity enhancementBiometric deviceHealth monitoringHydrothermal treatment
Keywords
ENHANCEMENTELECTRONICS
ISSN
0956-5663
Abstract
This paper reports a new biocompatible conductivity enhancement of poly (3,4-ethylenedioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) films for biomedical applications. Conductivity of PEDOT:PSS layer was reproducibly from 0.495 to 125.367 S cm−1 by hydrothermal (HT) treatment. The HT treatment employs water (relative humidity > 80%) and heat (temperature > 61 °C) instead of organic solvent doping and post-treatments, which can leave undesirable residue. The treatment can be performed using the sterilizing conditions of an autoclave. Additionally, it is possible to simultaneously reduce the electrical resistance, and sterilize the electrode for practical use. The key to conductivity enhancement was the structural rearrangement of PEDOT:PSS, which was determined using atomic force microscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and ultraviolet–visible spectroscopy. It was found that PEDOT inter-bridging occurred as a result of the structural rearrangement. Therefore, the conductivity increased on account of the continuous conductive pathways of the PEDOT chains. To test the biocompatible enhancement technique for biomedical applications, certain demonstrations, such as the monitoring of joint movements and skin temperature, and measuring electrocardiogram signals were conducted with the hydrothermal-treated PEDOT:PSS electrode. This simple, biocompatible treatment exhibited significant potential for use in other biomedical applications as well. © 2020 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/12620
DOI
10.1016/j.bios.2020.112717
Publisher
Pergamon Press Ltd.
Related Researcher
  • Author Lee, Sungwon Bio-Harmonized Device Lab
  • Research Interests Ultrathin Device Fabrication; Bio sensors Development; Functional Material Development
Files:
There are no files associated with this item.
Collection:
Department of Emerging Materials ScienceSpin Nanotech Laboratory1. Journal Articles
Department of Emerging Materials ScienceMultifunctional films and nanostructures Lab1. Journal Articles
Department of Emerging Materials ScienceBio-Harmonized Device Lab1. Journal Articles


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