Relaxation processes of water in the liquid to glassy states of water mixtures studied by broadband dielectric spectroscopy

Shinyashiki, N; Sudo, S; Yagihara, S; Spanoudaki, A; Kyritsis, A; Pissis, P

dc.contributor.author	Shinyashiki, N	en
dc.contributor.author	Sudo, S	en
dc.contributor.author	Yagihara, S	en
dc.contributor.author	Spanoudaki, A	en
dc.contributor.author	Kyritsis, A	en
dc.contributor.author	Pissis, P	en
dc.date.accessioned	2014-03-01T02:44:56Z
dc.date.available	2014-03-01T02:44:56Z
dc.date.issued	2007	en
dc.identifier.issn	0953-8984	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32034
dc.subject	Dielectric Spectroscopy	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Carrier mobility	en
dc.subject.other	Dielectric spectroscopy	en
dc.subject.other	Glass transition	en
dc.subject.other	Molecular structure	en
dc.subject.other	Natural frequencies	en
dc.subject.other	Water	en
dc.subject.other	Broadband dielectric spectroscopy	en
dc.subject.other	Solute molecules	en
dc.subject.other	Subzero temperatures	en
dc.subject.other	Relaxation processes	en
dc.title	Relaxation processes of water in the liquid to glassy states of water mixtures studied by broadband dielectric spectroscopy	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1088/0953-8984/19/20/205113	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0953-8984/19/20/205113	en
heal.identifier.secondary	205113	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	The relaxation processes of water mixtures of glycerol, ethylene glycol, ethylene glycol oligomers with two to six repeat units, poly(ethylene glycol) 400 and 600, fructose, and propanol have been studied by broadband dielectric spectroscopy at different water contents in the frequency range 10 νHz-20 GHz and in the temperature range 300-80 K without water crystallization. The results show that, in the vicinity of the glass transition temperature of the mixtures, two kinds of water exist. Part of the water behaves as excess water retaining its inherent mobility and appearing as a separate relaxation process (named here the ν-process) at frequencies higher than the structural α-process at subzero temperatures. Another part of the water moves cooperatively with solute molecules and contributes to the α-process. © IOP Publishing Ltd.	en
heal.publisher	IOP PUBLISHING LTD	en
heal.journalName	Journal of Physics Condensed Matter	en
dc.identifier.doi	10.1088/0953-8984/19/20/205113	en
dc.identifier.isi	ISI:000246567700014	en
dc.identifier.volume	19	en
dc.identifier.issue	20	en