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      저자 : M. Mazharul Haq (검색결과 3 건)
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        Preparation and measurements of electrical and spectroscopic properties of sodium thiosulphate doped polyaniline

        Sadia Ameen,Vazid Ali,M. Zulfequar,M. Mazharul Haq,M. Husain 한국물리학회 2009 Current Applied Physics Vol.9 No.3

        Polyaniline has been synthesized and is doped with sodium thiosulphate. The doping of polyaniline (PANI) is done at two different time periods and DC conductivity is measured to see the effect of dopant. It has been observed that the crystallinity of PANI increases through doping which ultimately increases the conductivity. The conductivity result shows that the conduction is taking place through hopping process due to wide range of localized states present near the fermi level. Structural changes due to interaction of dopant species with PANI are studied through FTIR. Polyaniline has been synthesized and is doped with sodium thiosulphate. The doping of polyaniline (PANI) is done at two different time periods and DC conductivity is measured to see the effect of dopant. It has been observed that the crystallinity of PANI increases through doping which ultimately increases the conductivity. The conductivity result shows that the conduction is taking place through hopping process due to wide range of localized states present near the fermi level. Structural changes due to interaction of dopant species with PANI are studied through FTIR.

      • KCI등재후보

        Electrical conductivity and dielectric properties of sulfamic acid doped polyaniline

        Sadia Ameen,Vazid Ali,M. Zulfequar,M. Mazharul Haq,M. Husain 한국물리학회 2007 Current Applied Physics Vol.7 No.2

        The temperature and frequency dependence of dielectric constant (e0) and dielectric loss (e00) is studied for dierent samples of poly-aniline (PANI), doped with dierent concentration of sulfamic acid in the frequency range (10100 kHz) and temperature range (300by the propagation of polaron through a conjugated polymer chain due to shifting of double bonds (alternation), which gives rise toelectrical conduction.

      • KCI등재후보

        Electrical, thermal and spectroscopic studies of Te doped polyaniline

        Samrana Kazim,Vazid Ali,M. Zulfequar,M. Mazharul Haq,M. Husain 한국물리학회 2007 Current Applied Physics Vol.7 No.1

        In the present paper, we have reported the chemical synthesis and characterization of polyaniline doped with tellurium. The anilinewas polymerized by chemical oxidation using ammonium persulphate as an oxidant and was doped with dierent concentrations of tel-lurium. Doped PANI was characterized by using FTIR, DSC and two-probe conductivity measurement. The dc conductivity has beenmeasured to see the eect of tellurium and its mechanism has been explained by the formation of polarons and bipolarons that movedue to the incorporation of Te into the PANI chain. Glass transition temperature (Tg) and enthalpy (DH) have been calculated fromDSC measurements. FTIR spectra suggest the structural changes after incorporation of Te in polymeric chain.

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