skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Exceptionally crystalline and conducting acid doped polyaniline films by level surface assisted solution casting approach

Abstract

Emeraldine salt form of polyaniline (PANI) was synthesized by chemical oxidative polymerisation method using ammonium persulfate as oxidant. Resultant emeraldine salt form of PANI was dedoped using ammonia solution and then re-doped with camphor sulphonic acid (CSA), naphthaline sulphonic acid (NSA), hydrochloric acid (HCl), and m-cresol. Thin films of these doped PANI samples were deposited on glass substrates using solution casting method with m-cresol as solvent. A level surface was employed to get homogeneous thin films of uniform thickness. Detailed X-ray diffraction studies have shown that the films are exceptionally crystalline. The crystalline peaks observed in the XRD spectra can be indexed to simple monoclinic structure. FTIR and Raman spectroscopy studies provide convincing explanation for the exceptional crystallinity observed in these polymer films. FESEM and AFM images give better details of surface morphology of doped PANI films. The DC electrical conductivity of the samples was measured using four point probe technique. It is seen that the samples also exhibit quite high DC electrical conductivity, about 287 S/cm for CSA doped PANI, 67 S/cm for NSA doped PANI 65 S/cm for HCl doped PANI, and just below 1 S/cm for m-cresol doped PANI. Effect of using the level surface for solution casting is studied andmore » correlated with the observed crystallinity.« less

Authors:
; ;  [1]
  1. Nanophotonic and Optoelectronic Devices Laboratory, Department of Physics, Cochin University of Science and Technology, Cochin, Kerala 682022 (India)
Publication Date:
OSTI Identifier:
22591597
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 108; Journal Issue: 16; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMMONIA; ATOMIC FORCE MICROSCOPY; CASTING; CRESOLS; DOPED MATERIALS; ELECTRIC CONDUCTIVITY; FOURIER TRANSFORMATION; INFRARED SPECTRA; MATHEMATICAL SOLUTIONS; MONOCLINIC LATTICES; MORPHOLOGY; PERSULFATES; POLYMERIZATION; RAMAN SPECTROSCOPY; SOLVENTS; SURFACES; THICKNESS; THIN FILMS; X-RAY DIFFRACTION

Citation Formats

Puthirath, Anand B., Varma, Sreekanth J., Jayalekshmi, S., E-mail: jayalekshmi@cusat.ac.in, and Methattel Raman, Shijeesh. Exceptionally crystalline and conducting acid doped polyaniline films by level surface assisted solution casting approach. United States: N. p., 2016. Web. doi:10.1063/1.4947083.
Puthirath, Anand B., Varma, Sreekanth J., Jayalekshmi, S., E-mail: jayalekshmi@cusat.ac.in, & Methattel Raman, Shijeesh. Exceptionally crystalline and conducting acid doped polyaniline films by level surface assisted solution casting approach. United States. doi:10.1063/1.4947083.
Puthirath, Anand B., Varma, Sreekanth J., Jayalekshmi, S., E-mail: jayalekshmi@cusat.ac.in, and Methattel Raman, Shijeesh. Mon . "Exceptionally crystalline and conducting acid doped polyaniline films by level surface assisted solution casting approach". United States. doi:10.1063/1.4947083.
@article{osti_22591597,
title = {Exceptionally crystalline and conducting acid doped polyaniline films by level surface assisted solution casting approach},
author = {Puthirath, Anand B. and Varma, Sreekanth J. and Jayalekshmi, S., E-mail: jayalekshmi@cusat.ac.in and Methattel Raman, Shijeesh},
abstractNote = {Emeraldine salt form of polyaniline (PANI) was synthesized by chemical oxidative polymerisation method using ammonium persulfate as oxidant. Resultant emeraldine salt form of PANI was dedoped using ammonia solution and then re-doped with camphor sulphonic acid (CSA), naphthaline sulphonic acid (NSA), hydrochloric acid (HCl), and m-cresol. Thin films of these doped PANI samples were deposited on glass substrates using solution casting method with m-cresol as solvent. A level surface was employed to get homogeneous thin films of uniform thickness. Detailed X-ray diffraction studies have shown that the films are exceptionally crystalline. The crystalline peaks observed in the XRD spectra can be indexed to simple monoclinic structure. FTIR and Raman spectroscopy studies provide convincing explanation for the exceptional crystallinity observed in these polymer films. FESEM and AFM images give better details of surface morphology of doped PANI films. The DC electrical conductivity of the samples was measured using four point probe technique. It is seen that the samples also exhibit quite high DC electrical conductivity, about 287 S/cm for CSA doped PANI, 67 S/cm for NSA doped PANI 65 S/cm for HCl doped PANI, and just below 1 S/cm for m-cresol doped PANI. Effect of using the level surface for solution casting is studied and correlated with the observed crystallinity.},
doi = {10.1063/1.4947083},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 16,
volume = 108,
place = {United States},
year = {2016},
month = {4}
}