ICCAS OpenIR
Optical study on doped polyaniline composite films
Li, G; Zheng, P; Wang, NL; Long, YZ; Chen, ZJ; Li, JC; Wan, MX
2004-09-01
Source PublicationJOURNAL OF PHYSICS-CONDENSED MATTER
ISSN0953-8984
Volume16Issue:34Pages:6195-6204
AbstractLocalization driven by disorder has a strong influence on the conducting properties of conducting polymers. Some authors hold the opinion that disorder in the material is homogeneous and that the conducting polymer is a disordered metal close to the Anderson-Mott metal-insulator (MI) transition, while others treat the disorder as inhomogeneous and have the opinion that conducting polymers are a composite of ordered metallic regions and disordered insulating regions. The morphology of conducting polymers is an important factor that has an influence on the type and extent of disorder. Different protonic acids used as dopants and moisture have influence on the polymer chain arrangement and interchain interactions. We performed optical reflectance measurements on several PANI-CSA/PANI-DBSA composite films with different dopant ratios and moisture contents. Optical conductivity and the real part of the dielectric function are calculated by Kramers-Kronig (KK) relations. sigma(1)(omega) and epsilon(1)(omega) deviate from the simple Drude model in the low frequency range and the tendencies of the three sample are different and non-monotonic. The localization modified Drude model (LMD) in the framework of the Anderson-Mott theory cannot give a good fit to the experimental data. By introducing the distribution of relaxation time into the LMD, reasonable fits for all three samples are obtained. This result supports the inhomogeneous picture.
DOI10.1088/0953-8984/16/34/018
Indexed BySCI
Language英语
WOS IDWOS:000223904000020
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81762
Collection中国科学院化学研究所
Corresponding AuthorLi, G
Affiliation1.Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China
3.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Organ Solid Lab, Beijing 10080, Peoples R China
Recommended Citation
GB/T 7714
Li, G,Zheng, P,Wang, NL,et al. Optical study on doped polyaniline composite films[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2004,16(34):6195-6204.
APA Li, G.,Zheng, P.,Wang, NL.,Long, YZ.,Chen, ZJ.,...&Wan, MX.(2004).Optical study on doped polyaniline composite films.JOURNAL OF PHYSICS-CONDENSED MATTER,16(34),6195-6204.
MLA Li, G,et al."Optical study on doped polyaniline composite films".JOURNAL OF PHYSICS-CONDENSED MATTER 16.34(2004):6195-6204.
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