High-frequency dielectric response of polyaniline pellets as nanocomposites of metallic emeraldine salt and dielectric base

Nuzhnyy, Dmitry; Petzelt, Jan; Rychetský, Ivan; Trchová, Miroslava; Stejskal, Jaroslav

doi:https://dx.doi.org/10.1016/j.synthmet.2015.09.002

Number of the records: 1

High-frequency dielectric response of polyaniline pellets as nanocomposites of metallic emeraldine salt and dielectric base

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SYSNO ASEP	0448157
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	High-frequency dielectric response of polyaniline pellets as nanocomposites of metallic emeraldine salt and dielectric base
Author(s)	Nuzhnyy, Dmitry (FZU-D)_{RID, ORCID} Petzelt, Jan (FZU-D)_{RID, ORCID, SAI} Rychetský, Ivan (FZU-D)_{RID, ORCID} Trchová, Miroslava (UMCH-V)_{RID, ORCID} Stejskal, Jaroslav (UMCH-V)_{RID, ORCID, SAI}
Source Title	Synthetic Metals. - : Elsevier - ISSN 0379-6779 Roč. 209, Nov (2015), s. 561-569
Number of pages	9 s.
Language	eng - English
Country	CH - Switzerland
Keywords	polyaniline ; infrared and THz spectroscopy ; optical conductivity ; dielectric permittivity ; vibrational mode ; effective medium approach
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	GAP204/12/0232 GA ČR - Czech Science Foundation (CSF)
	GAP205/12/0911 GA ČR - Czech Science Foundation (CSF)
Institutional support	FZU-D - RVO:68378271 ; UMCH-V - RVO:61389013
UT WOS	000364245900081
EID SCOPUS	84942474889
DOI	10.1016/j.synthmet.2015.09.002
Annotation	Conducting polyaniline (PANI) salt and dielectric PANI base pellets were studied in the infrared (IR) and terahertz (THz) range at room temperature and compared with the IR transmission spectra of powdered samples dispersed in potassium bromide and with those of thin films. The IR reflectivity combined with THz transmission was fitted to calculate the permittivity and IR conductivity spectra. Good agreement between the IR conductivity peaks and those from the absorbance evaluated from the transmission measurements was obtained and differences between the spectra of PANI salt and base are discussed. The dielectric and conductivity spectra of PANI salt were modeled as the spectra of a composite of PANI base and metallic PANI. Effective medium approach using three different models was applied and discussed. The best results, including the semiconductor-like temperature dependence of the low-frequency conductivity, were obtained with the generalized Lichtenecker model.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2016

Number of the records: 1