Glass transition in 2- and 3-dimensionally confined liquids

Pissis, P; Kyritsis, A; Barut, G; Pelster, R; Nimtz, G

dc.contributor.author	Pissis, P	en
dc.contributor.author	Kyritsis, A	en
dc.contributor.author	Barut, G	en
dc.contributor.author	Pelster, R	en
dc.contributor.author	Nimtz, G	en
dc.date.accessioned	2014-03-01T01:13:46Z
dc.date.available	2014-03-01T01:13:46Z
dc.date.issued	1998	en
dc.identifier.issn	0022-3093	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12717
dc.subject	Dielectric Relaxation	en
dc.subject	Glass Transition	en
dc.subject	Glass Transition Temperature	en
dc.subject	Hydrogen Bond	en
dc.subject	Propylene Glycol	en
dc.subject	2 dimensional	en
dc.subject	3 dimensional	en
dc.subject.classification	Materials Science, Ceramics	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	CHARACTERISTIC LENGTH	en
dc.subject.other	PORES	en
dc.title	Glass transition in 2- and 3-dimensionally confined liquids	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0022-3093(98)00512-2	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0022-3093(98)00512-2	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	Broadband dielectric relaxation spectroscopy and thermally stimulated depolarization currents (TSDC) measurements were employed to investigate effects of confinement on the glass transition of the hydrogen bonded liquid propylene glycol (PG) and the non-associating liquid N-methyl-epsilon-caprolactam (NMEC). The liquids were confined 2-dimensionally in the pores of porous glasses with mean pore diameter 2.5 less than or equal to d less than or equal to 20.0 nm and 3-dimensionally confined in butyl rubber with mean droplet diameter 7 less than or equal to d less than or equal to 11 nm. The data provide evidence for both the cooperativity concept and the existence of two states (interfacial layer and liquid). With decreasing d the alpha relaxation associated with the glass transition of the liquid becomes faster and broader and the glass transition temperature decreases. These effects are larger for 3- than for 2-dimensional confinement. The cooperativity length, xi, at T-g is determined to xi less than or equal to 6 nm for PG and xi less than or equal to 12 nm for NMEC. (C) 1998 Elsevier Science B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Journal of Non-Crystalline Solids	en
dc.identifier.doi	10.1016/S0022-3093(98)00512-2	en
dc.identifier.isi	ISI:000075838800072	en
dc.identifier.volume	235-237	en
dc.identifier.spage	444	en
dc.identifier.epage	449	en