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Titolo:
AC electrical properties of conjugated polymers and theoretical high-frequency behavior of multilayer films
Autore:
Lee, CY; Kim, HM; Park, JW; Gal, YS; Jin, JI; Joo, J;
Indirizzi:
Korea Univ, Dept Phys, Seoul 136701, South Korea Korea Univ Seoul South Korea 136701 Dept Phys, Seoul 136701, South Korea Korea Univ, Ctr Electro & Photo Respons Mol, Seoul 136701, South Korea Korea Univ Seoul South Korea 136701 spons Mol, Seoul 136701, South Korea Chungju Natl Univ, Dept Polymer Engn, Chungju 380702, South Korea Chungju Natl Univ Chungju South Korea 380702 Chungju 380702, South Korea Kyungil Univ, Coll Gen Educ, Polymer Chem Lab, Kyungsan 712701, South Korea Kyungil Univ Kyungsan South Korea 712701 b, Kyungsan 712701, South Korea
Titolo Testata:
SYNTHETIC METALS
fascicolo: 1-3, volume: 117, anno: 2001,
pagine: 109 - 113
SICI:
0379-6779(20010215)117:1-3<109:AEPOCP>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONDUCTIVITY;
Keywords:
polyaniline; polyacetylene derivatives; poly(1,4-phenylenevinylene); AC dielectric constant; AC conductivity; multilayer films; electromagnetic interference shielding efficiency;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
9
Recensione:
Indirizzi per estratti:
Indirizzo: Joo, J Korea Univ, Dept Phys, Seoul 136701, South Korea Korea Univ SeoulSouth Korea 136701 ys, Seoul 136701, South Korea
Citazione:
C.Y. Lee et al., "AC electrical properties of conjugated polymers and theoretical high-frequency behavior of multilayer films", SYNTH METAL, 117(1-3), 2001, pp. 109-113

Abstract

AC electrical properties of various conjugated polymers such as emeraldinebase form of polyaniline, polyacetylene derivatives, and poly(1.4-phenylenevinylene) and its derivative are studied. Dielectric constant and conductivity are measured in the frequency range from 10 Hz to 2 MHz and in the temperature range from 78 to 300 K. Frequency dependence of ac dielectric constant follows Debye or Cole-Cole dielectric relaxation equation, and temperature dependence of relaxation time tau follows Arrhenius equation tau = tau(0) exp(E-a/k(B)T). Frequency dependence of ac conductivity shows a constant behavior in low-frequency regime (less than or equal to 10 kHz) and a power-law behavior (sigma similar to omega (s)) in high-frequency regime (greater than or equal to 100 kHz). For the applications of multilayer films ofconducting polymers such as electromagnetic interference (EMI) shielding or optical filter, we theoretically calculate the reflectance, absorbance, and EMI shielding efficiency in high-frequency range (greater than or equal to1 GHz) based on plane wave theory. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 09:46:28