Tailoring polypyrrole morphology and electronic properties through CTAB-SDS self-assembly
Issued Date
2025-01-05
Resource Type
ISSN
09277757
eISSN
18734359
Scopus ID
2-s2.0-85206325078
Journal Title
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume
704
Rights Holder(s)
SCOPUS
Bibliographic Citation
Colloids and Surfaces A: Physicochemical and Engineering Aspects Vol.704 (2025)
Suggested Citation
Samwang T., Watanabe N.M., Okamoto Y., Umakoshi H. Tailoring polypyrrole morphology and electronic properties through CTAB-SDS self-assembly. Colloids and Surfaces A: Physicochemical and Engineering Aspects Vol.704 (2025). doi:10.1016/j.colsurfa.2024.135527 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/102829
Title
Tailoring polypyrrole morphology and electronic properties through CTAB-SDS self-assembly
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Author's Affiliation
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Abstract
This study explores the polymerization of polypyrrole (PPy) within a self-assembled catanionic surfactant composed of cetyltrimethylammonium bromide (CTAB) - sodium dodecyl sulfate (SDS), aiming to control its morphology and electronic properties. The research systematically investigates how varying the compositions of CTAB and SDS surfactants influence the structural and electronic characteristics of PPy. Our findings indicate that the surfactant composition predominantly impacts the shape of PPy rather than its crystallinity. Despite the absence of significant crystallinity, variations in surfactant composition notably alter the electronic properties of PPy. Specifically, an increase in CTAB content results in electrical conductivity increasing from 0.34 to 0.01 S/m. Conversely, higher SDS content enhances the bipolaron-to-polaron ratio, particularly in the C−H deformation region, contributing to improved electronic characteristics. Additionally, packing density analysis reveals that the ordered or disordered acyl chain arrangement within the catanionic surfactant system varies significantly with surfactant composition, further influencing the morphology and electronic properties of PPy. These findings provide valuable pave for designing conductive polymers with tailored electronic properties by a catanionic surfactant, where precise control over such properties is crucial.