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Author Puthirath, Anand B. ♦ Varma, Sreekanth J. ♦ Jayalekshmi, S. ♦ Methattel Raman, Shijeesh
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword 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
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 and correlated with the observed crystallinity.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-04-18
Publisher Place United States
Journal Applied Physics Letters
Volume Number 108
Issue Number 16


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