Transport properties of HCl doped polyaniline and polyaniline methyl cellulose dispersion

被引：46

作者：

Ghosh, M ^{[1
]}

Barman, A ^{[1
]}

De, SK ^{[1
]}

Chatterjee, S ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, W Bengal, India

来源：

JOURNAL OF APPLIED PHYSICS | 1998年 / 84卷 / 02期

关键词：

D O I：

10.1063/1.368141

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 rho(r) = rho(1.8 K)/rho(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 10(2)less than or equal to rho(r)less than or equal to 10(3) exhibit a crossover from Mott to Efros-Shklovskii VRH conduction below 10 K. A large positive magnetoresistance at low temperature has been obtained. (C) 1998 American Institute of Physics. [S0021-8979(98)08513-2]

引用

页码：806 / 811

页数：6

共 32 条

[1] POLYANILINE - PROCESSABILITY FROM AQUEOUS-SOLUTIONS AND EFFECT OF WATER-VAPOR ON CONDUCTIVITY [J].

ANGELOPOULOS, M ;

RAY, A ;

MACDIARMID, AG ;

EPSTEIN, AJ .

SYNTHETIC METALS, 1987, 21 (01) :21-30

[2]

[Anonymous], HOPPING TRANSPORT SO

[3] INFLUENCE OF CHEMICAL POLYMERIZATION CONDITIONS ON THE PROPERTIES OF POLYANILINE [J].

CAO, Y ;

ANDREATTA, A ;

HEEGER, AJ ;

SMITH, P .

POLYMER, 1989, 30 (12) :2305-2311

[4] Methyl cellulose stabilized polyaniline dispersions [J].

Chattopadhyay, D ;

Mandal, BM .

LANGMUIR, 1996, 12 (06) :1585-1588

[5] POLYANILINE - PROTONIC ACID DOPING OF THE EMERALDINE FORM TO THE METALLIC REGIME [J].

CHIANG, JC ;

MACDIARMID, AG .

SYNTHETIC METALS, 1986, 13 (1-3) :193-205

[6]

CHIANG JC, 1995, ONE DIMENSIONAL META

[7] The degree of ionization of ethyl alcohol I From measurements of conductivity [J].

Danner, PS ;

Hildebrand, JH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1922, 44 :2824-2831

[8] COULOMB GAP AND LOW-TEMPERATURE CONDUCTIVITY OF DISORDERED SYSTEMS [J].

EFROS, AL ;

SHKLOVSKII, BI .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1975, 8 (04) :L49-L51

[9] POLYANILINE FIBERS, FILMS, AND POWDERS - X-RAY STUDIES OF CRYSTALLINITY AND STRESS-INDUCED PREFERRED ORIENTATION [J].

FISCHER, JE ;

ZHU, Q ;

TANG, X ;

SCHERR, EM ;

MACDIARMID, AG ;

CAJIPE, VB .

MACROMOLECULES, 1994, 27 (18) :5094-5101

[10] INFLUENCE OF OXIDATION-STATE, PH, AND COUNTERION ON THE CONDUCTIVITY OF POLYANILINE [J].

FOCKE, WW ;

WNEK, GE ;

WEI, Y .

JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (22) :5813-5818

← 1 2 3 4 →