Structure and properties of polyaniline nanocomposite coatings containing gold nanoparticles formed by low-energy electron beam deposition

Surui Wang, A.A. Rogachev, M. Yarmolenko, A.V. Rogachev, Jiang Xiaohong, M. S. Gaur, P. A. Luchnikov, O. V. Galtseva, S. A. Chizhik

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Highly ordered conductive polyaniline (PANI) coatings containing gold nanoparticles were prepared by low-energy electron beam deposition method, with emeraldine base and chloroauric acid used as target materials. The molecular and chemical structure of the layers was studied by Fourier transform infrared, Raman, UV–vis and X-ray photoelectron spectroscopy. The morphology of the coatings was investigated by atomic force and transmission electron microscopy. Conductive properties were obtained by impedance spectroscopy method and scanning spreading resistance microscopy mode at the micro- and nanoscale. It was found that the emeraldine base layers formed from the products of electron-beam dispersion have extended, non-conductive polymer chains with partially reduced structure, with the ratio of imine and amine groups equal to 0.54. In case of electron-beam dispersion of the emeraldine base and chloroauric acid, a protoemeraldine structure is formed with conductivity 0.1 S/cm. The doping of this structure was carried out due to hydrochloric acid vapor and gold nanoparticles formed by decomposition of chloroauric acid, which have a narrow size distribution, with the most probable diameter about 40 nm. These gold nanoparticles improve the conductivity of the thin layers of PANI + Au composite, promoting intra- and intermolecular charge transfer of the PANI macromolecules aligned along the coating surface both at direct and alternating voltage. The proposed deposition method of highly oriented, conductive nanocomposite PANI-based coatings may be used in the direct formation of functional layers on conductive and non-conductive substrates.

Original languageEnglish
Pages (from-to)1070-1078
Number of pages9
JournalApplied Surface Science
Volume428
DOIs
Publication statusPublished - 15 Jan 2018

Fingerprint

Polyaniline
Gold
Electron beams
Nanocomposites
Nanoparticles
Coatings
Acids
Imines
Hydrochloric Acid
Hydrochloric acid
Macromolecules
Molecular structure
Amines
Charge transfer
Fourier transforms
Microscopic examination
Polymers
X ray photoelectron spectroscopy
Vapors
Doping (additives)

Keywords

  • Electron beam deposition
  • Gold nanoparticles
  • Nanocomposite coating
  • Polyaniline
  • Thin conductive polymer film

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Structure and properties of polyaniline nanocomposite coatings containing gold nanoparticles formed by low-energy electron beam deposition. / Wang, Surui; Rogachev, A.A.; Yarmolenko, M.; Rogachev, A.V.; Xiaohong, Jiang; Gaur, M. S.; Luchnikov, P. A.; Galtseva, O. V.; Chizhik, S. A.

In: Applied Surface Science, Vol. 428, 15.01.2018, p. 1070-1078.

Research output: Contribution to journalArticle

Wang, Surui ; Rogachev, A.A. ; Yarmolenko, M. ; Rogachev, A.V. ; Xiaohong, Jiang ; Gaur, M. S. ; Luchnikov, P. A. ; Galtseva, O. V. ; Chizhik, S. A. / Structure and properties of polyaniline nanocomposite coatings containing gold nanoparticles formed by low-energy electron beam deposition. In: Applied Surface Science. 2018 ; Vol. 428. pp. 1070-1078.
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AU - Xiaohong, Jiang

AU - Gaur, M. S.

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AB - Highly ordered conductive polyaniline (PANI) coatings containing gold nanoparticles were prepared by low-energy electron beam deposition method, with emeraldine base and chloroauric acid used as target materials. The molecular and chemical structure of the layers was studied by Fourier transform infrared, Raman, UV–vis and X-ray photoelectron spectroscopy. The morphology of the coatings was investigated by atomic force and transmission electron microscopy. Conductive properties were obtained by impedance spectroscopy method and scanning spreading resistance microscopy mode at the micro- and nanoscale. It was found that the emeraldine base layers formed from the products of electron-beam dispersion have extended, non-conductive polymer chains with partially reduced structure, with the ratio of imine and amine groups equal to 0.54. In case of electron-beam dispersion of the emeraldine base and chloroauric acid, a protoemeraldine structure is formed with conductivity 0.1 S/cm. The doping of this structure was carried out due to hydrochloric acid vapor and gold nanoparticles formed by decomposition of chloroauric acid, which have a narrow size distribution, with the most probable diameter about 40 nm. These gold nanoparticles improve the conductivity of the thin layers of PANI + Au composite, promoting intra- and intermolecular charge transfer of the PANI macromolecules aligned along the coating surface both at direct and alternating voltage. The proposed deposition method of highly oriented, conductive nanocomposite PANI-based coatings may be used in the direct formation of functional layers on conductive and non-conductive substrates.

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