Preparation, characterization and electrical behaviors of PEDOT:PSS-Au/Ag nanocomposite thin films: an ecofriendly approach

Structure, morphology and electrical behaviors of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) or PEDOT:PSS thin films are investigated in the presence of protein-mediated green chemically synthesized positively charged gold and silver nanoparticles. The pure and PEDOT:PSS nanocomposite...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2019-10, Vol.76 (10), p.5233-5251
Main Authors: Bhowal, Ashim Chandra, Talukdar, Hrishikesh, Kundu, Sarathi
Format: Article
Language:English
Subjects:
Atomic force microscopy
Characterization and Evaluation of Materials
Charge transfer
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Electrical properties
Electrical resistivity
Electrostatic shielding
Fourier transforms
Glass substrates
Gold
Morphology
Nanocomposites
Nanoparticles
Organic Chemistry
Original Paper
Physical Chemistry
Polymer Sciences
Polymers
Silver
Soft and Granular Matter
Solvents
Spectrum analysis
Spin coating
Thickness
Thin films
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Summary:Structure, morphology and electrical behaviors of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) or PEDOT:PSS thin films are investigated in the presence of protein-mediated green chemically synthesized positively charged gold and silver nanoparticles. The pure and PEDOT:PSS nanocomposite thin films are prepared by spin coating method. The presence of both nanoparticle and polymer is confirmed from X-ray diffraction, whereas composite formation is confirmed from Raman and FTIR spectroscopy. Atomic force microscopy (AFM) images show the surface morphologies of both pure and composite films, whereas average film thicknesses are obtained from AFM and X-ray reflectivity analysis. The presence of electrostatic interaction between the positively charged metallic nanoparticles and negatively charged PSS chains leads to the electrostatic shielding between cationic PEDOT and anionic PSS, which favors better charge transfer through PEDOT–PEDOT conducting paths. The increase in electrical conductivity is visualized from the current–voltage ( I – V ) curves, which show that the conductivity is relatively higher in the presence of silver than gold nanoparticles in the composite thin films. The conductivity of nanocomposite films is approximately five to six times enhanced in comparison with the pristine PEDOT:PSS thin films.
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-018-2652-z