Journal ArticleDOI
Transport properties of HCl doped polyaniline and polyaniline–methyl cellulose dispersion
TLDR
In this article, the temperature dependence of resistivity for both PANI and PANI-MC has been analyzed by three-dimensional variable range hopping (VRH) type of conduction.Abstract:
Electrical resistance and magnetoresistance of the HCl doped polyaniline (PANI) in aqueous ethanol medium and polyaniline–methyl cellulose dispersion (PANI–MC) has been investigated at low temperature down to 1.8 K and in magnetic field up to 8 T. The weaker temperature dependence of resistivity characterized by the resistivity ratio ρr=ρ(1.8 K)/ρ(300 K) indicates that a better homogeneity and less disorder can be obtained by protonation with HCl in ethanol media. The temperature dependence of resistivity for both PANI and PANI–MC has been analyzed by three-dimensional variable range hopping (VRH) type of conduction. The samples with the resistivity ratio lying in the range of 102⩽ρr⩽103 exhibit a crossover from Mott to Efros–Shklovskii VRH conduction below 10 K. A large positive magnetoresistance at low temperature has been obtained.read more
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Electronic transport in single polyaniline and polypyrrole microtubes
Yunze Long,Lijuan Zhang,Zhaojia Chen,Kun Huang,Yongsheng Yang,H. Xiao,Meixiang Wan,Aizi Jin,Changzhi Gu +8 more
TL;DR: In this article, a template-free method was used to synthesize complete doped polyaniline and polypyrrole sub-microtubes with high resistivity and a small positive magnetoresistance.
Journal ArticleDOI
Electrical transport and magnetoresistance in advanced polyaniline nanostructures and nanocomposites
Hongbo Gu,Jiang Guo,Xingru Yan,Huige Wei,Xi Zhang,Jiurong Liu,Yudong Huang,Suying Wei,Zhanhu Guo +8 more
TL;DR: In this paper, the electrical transport mechanism and giant magnetoresistance (GMR) in advanced polyaniline (PANI) nanostructures and the related PANI nanocomposite systems are critically reviewed.
Journal ArticleDOI
Nano approach investigation of the conduction mechanism in polyaniline nanofibers.
Yen-Fu Lin,Chien Hsiang Chen,Wen Jia Xie,Sheng-Hsiung Yang,Chain-Shu Hsu,Minn-Tsong Lin,Minn-Tsong Lin,Wen-Bin Jian +7 more
TL;DR: The nanotechnological approach, where the nanogap and the dielectrophoresis technique are used for single nanofiber device fabrication, is applied for determination of mesoscopic charge transport in a polyaniline conducting polymer.
Journal ArticleDOI
Electron transport properties of cobalt doped polyaniline
TL;DR: In this article, the dc resistivity and magnetoresistivity of cobalt doped polyaniline in an aqueous ethanol medium were investigated in the temperature range 77 ≤ T ≤ 300 K, applying magnetic fields up to 1
Journal ArticleDOI
Magnetoresistance studies of polymer nanotube/wire pellets and single polymer nanotubes/wires
Yunze Long,Yunze Long,Zhaojia Chen,Jiaoyan Shen,Zhiming Zhang,Lijuan Zhang,Kun Huang,Meixiang Wan,Aizi Jin,Changzhi Gu,Jean-Luc Duvail +10 more
TL;DR: In this article, conductivity and magnetoresistance measurements on pellets of conducting polyaniline and polypyrrole nanotubes/wires were presented, and a transition from small negative MR to large positive MR was measured below 60 K.
References
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Book
Electronic processes in non-crystalline materials
TL;DR: The Fermi Glass and the Anderson Transition as discussed by the authorsermi glass and Anderson transition have been studied in the context of non-crystalline Semiconductors, such as tetrahedrally-bonded semiconductors.
Electronic properties of doped semiconductors
Boris I Shklovskii,A. L. Efros +1 more
TL;DR: In the last fifteen years, there has been a noticeable shift towards impure semiconductors -a shift which came about because it is precisely the impurities that are essential to a number of major semiconductor devices.
Journal ArticleDOI
‘Polyaniline’: Protonic acid doping of the emeraldine form to the metallic regime
J. C. Chiang,Alan G. MacDiarmid +1 more
TL;DR: The emeraldine base form of polyaniline, which consists of equal numbers of reduced and oxidized repeat units, is doped to the metallic conducting regime by aqueous 1 M HCl as mentioned in this paper.
Journal ArticleDOI
Coulomb gap and low temperature conductivity of disordered systems
A. L. Efros,Boris I Shklovskii +1 more
TL;DR: In this paper, the Coulomb interaction between localized electrons is shown to create a soft gap in the density of states near the Fermi level, and the form of the density within the gap is discussed.
Journal ArticleDOI
Influence of chemical polymerization conditions on the properties of polyaniline
TL;DR: In this article, the polymerization of aniline in aqueous solutions was studied as a function of a wide variety of synthesis parameters, such as pH, relative concentration of reactants, polymerization temperature and time.