Conductivity Spectra of Polyphosphazene based Polyelectrolyte Multilayers

Akgöl, Yahya; Hofmann, Christian; KARATAŞ, YUNUS; Cramer, Cornelia; Wiemhöfer, Hans Dieter; Schönhoff, Monika

doi:10.1021/jp068872w

Conductivity Spectra of Polyphosphazene based Polyelectrolyte Multilayers

Yazarlar (6)

Yahya Akgöl
University Of Münster, Almanya

Christian Hofmann
University Of Münster, Almanya

Prof. Dr. Yunus KARATAŞ University Of Münster, Almanya

Cornelia Cramer
University Of Münster, Almanya

Hans Dieter Wiemhöfer
University Of Münster, Almanya

Monika Schönhoff
University Of Münster, Almanya

Bildiri Türü	Tebliğ/Bildiri	Bildiri Dili	İngilizce
Bildiri Alt Türü	Poster Olarak Sergilenen Tebliğ (Uluslararası Kongre/Sempozyum)
Bildiri Niteliği	Alanında Hakemli Uluslararası Kongre/Sempozyum
DOI Numarası	10.1021/jp068872w
Kongre Adı	21st Conference of the European Colloid and InterfaceSociety
Kongre Tarihi	10-09-2007 / 14-09-2007
Basıldığı Ülke	İsviçre	Basıldığı Şehir	Cenevre
UAK Araştırma Alanları	Fen Bilimleri ve Matematik

Özet

Polyelectrolyte multilayers are built up from ionically modified polyphosphazenes by layer-by-layer assembly of a cationic (poly[bis(3-amino-N,N, N-trimethyl-l-propanaminium iodide)phosphazene] (PAZ+) and an anionic poly[bis(lithium carboxylatophenoxy)phosphazene] (PAZ^-). In comparison, multilayers of poly(sodium 4-styrenesulfonate) (PSS) and poly(allylamine hydrochloride) (PAH) are investigated. Frequency-dependent conductivity spectra are taken in sandwich geometry at controlled relative humidity. Conductivity spectra of ion-conducting materials generally display a dc plateau at low frequencies and a dispersive regime at higher frequencies. In the present case, the dispersive regime shows a frequency dependence, which is deviating from the typical behavior found in most ion-conducting materials. Dc conductivity values, which can be attributed to long-range ionic transport, are on the order of σdc = 10-10-10^-7 S·cm^-1 and strongly depend on relative humidity. For PAZ ⁺/PAZ^- multilayers σdc is consistently larger by one decade as compared to PSS/PAH layers, while the humidity dependence is similar, pointing at general mechanisms. A general law of a linear dependence of log(σdc) on relative humidity is found over a wide range of humidity and holds for both multilayer systems. This very strong dependence was attributed to variations of the ion mobility with water content, since the water content itself is not drastically dependent on humidity. © 2007 American Chemical Society.

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Scopus	56
Google Scholar	63

Conductivity Spectra of Polyphosphazene based Polyelectrolyte Multilayers

Dergi Adı	JOURNAL OF PHYSICAL CHEMISTRY B
Yayıncı	American Chemical Society
Açık Erişim	Hayır
ISSN	1520-6106
E-ISSN	1520-5207
CiteScore	5,3
SJR	0,742
SNIP	0,811

Conductivity Spectra of Polyphosphazene based Polyelectrolyte Multilayers

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