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AuthorAhmad Ruzaidi, Dania Adila
AuthorMaurya, Muni Raj
AuthorYempally, Swathi
AuthorAbdul Gafoor, Sajeel
AuthorGeetha, Mithra
AuthorChe Roslan, Nazreen
AuthorCabibihan, John-John
AuthorKumar Sadasivuni, Kishor
AuthorMahat, Mohd Muzamir
Available date2023-10-08T08:41:45Z
Publication Date2023
Publication NameRSC Advances
ResourceScopus
ISSN20462069
URIhttp://dx.doi.org/10.1039/d3ra00584d
URIhttp://hdl.handle.net/10576/48302
AbstractThe field of strain sensing involves the ability to measure an electrical response that corresponds to a strain. The integration of synthetic and conducting polymers can create a flexible strain sensor with a wide range of applications, including soft robotics, sport performance monitoring, gaming and virtual reality, and healthcare and biomedical engineering. However, the use of insulating synthetic polymers can impede the semiconducting properties of sensors, which may reduce sensor sensitivity. Previous research has shown that the doping process can significantly enhance the electrical performance and ionic conduction of conducting polymers, thereby strengthening their potential for use in electronic devices. However the full effects of secondary doping on the crystallinity, stretchability, conductivity, and sensitivity of conducting polymer blends have not been studied. In this study, we investigated the effects of secondary doping on the properties of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)/poly(vinyl alcohol) (PEDOT:PSS/PVA) polymer blend thin films and their potential use as strain sensors. The thin films were prepared using a facile drop-casting method. Morphology analysis using profilometry and atomic force microscopy confirmed the occurrence of phase segregation and revealed surface roughness values. This evidence provided a comprehensive understanding of the chemical interactions and physical properties of the thin films, and the effects of doping on these properties. The best films were selected and applied as sensitive strain sensors. EG-PEDOT:PSS/PVA thin films showing a significant increase of conductivity values from the addition of 1 vol% to 12 vol% addition, with conductivity values of 8.51 x 10-5 to 9.42 x 10-3 S cm-1. Our 12% EG-PEDOT:PSS/PVA sensors had the highest GF value of 2000 too. We compared our results with previous studies on polymeric sensors, and it was found that our sensors quantitatively had better GF values. Illustration that demonstrates the DMSO and EG dopant effects on PEDOT:PSS structure through bonding interaction, crystallinity, thermal stability, surface roughness, conductivity and stretchability was also provided. This study suggests a new aspect of doping interaction that can enhance the conductivity and sensitivity of PEDOT:PSS for device applications.
SponsorThis work was supported by Qatar National Research Fund under grant no. NPRP12S-0131-190030. The statements made herein are solely the responsibility of the authors.
Languageen
PublisherRoyal Society of Chemistry
SubjectAtomic force microscopy
Blending
Crystallinity
Functional polymers
Morphology
Polymer blends
Polymer films
Semiconducting films
Semiconducting polymers
Semiconductor doping
Styrene
Surface roughness
Surface segregation
Thin films
Cristallinity
Ethylenedioxythiophenes
PEDOT/PSS
Poly (vinyl alcohol) (PVA)
Poly(styrene sulfonate)
Poly(vinyl alcohol)
Poly(vinyl alcohol) (PVA)
Property
Strain sensors
Thin-films
Conducting polymers
TitleRevealing the improved sensitivity of PEDOT:PSS/PVA thin films through secondary doping and their strain sensors application
TypeArticle
Pagination8202-8219
Issue Number12
Volume Number13
dc.accessType Open Access


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