Transparent polyaniline thin film synthesized using a low-voltage-driven atmospheric pressure plasma reactor

Jae Young Kim, Shahzad Iqbal, Hyo Jun Jang, Eun Young Jung, Gyu Tae Bae, Choon Sang Park, Bhum Jae Shin, Heung Sik Tae

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The use of low-voltage-driven plasma in atmospheric pressure (AP) plasma polymerization is considered as a simple approach to reducing the reactivity of the monomer fragments in order to prevent excessive cross-linking, which would have a negative effect on the structural properties of the polymerized thin films. In this study, AP-plasma polymerization can be processed at low voltage by an AP-plasma reactor with a wire electrode configuration. A bare tungsten wire is used as a powered electrode to initiate discharge in the plasma area (defined as the area between the wide glass tube and the substrate stand), thus allowing plasma polymerization to proceed at a lower voltage compared to other AP-plasma reactors with dielectric barriers. Thus, transparent polyaniline (PANI) films are successfully synthesized. The surface morphology, roughness, and film thickness of the PANI films are characterized by field emission scanning electron microscopy and atomic force microscopy. Thus, the surface of the polymerized film is shown to be homogenous, smooth, and flat, with a low surface roughness of 1 nm. In addition, the structure and chemical properties of the PANI films are investigated by Fourier transform infrared spectroscopy, thus revealing an improvement in the degree of polymerization, even though the process was performed at low voltage.

Original languageEnglish
Article number1278
Pages (from-to)1-11
Number of pages11
JournalMaterials
Volume14
Issue number5
DOIs
StatePublished - 1 Mar 2021

Keywords

  • Aniline
  • Atmospheric pressure plasma reactor
  • Conjugated polymer film
  • Plasma polymerization
  • Polyaniline

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