title: Negative Pressure Vitrification of the Isochorically Confined Liquid in Nanopores.
abstract: Dielectric relaxation studies for model glass-forming liquids confined to nanoporous alumina matrices were examined together with high-pressure results. For confined liquids which show the deviation from bulk dynamics upon approaching the glass transition (the change from the Vogel-Fulcher-Tammann to the Arrhenius law), we have observed a striking agreement between the temperature dependence of the α-relaxation time in the Arrhenius-like region and the isochoric relaxation times extrapolated from the positive range of pressure to the negative pressure domain. Our finding provides strong evidence that glass-forming liquid confined to native nanopores enters the isochoric conditions once the mobility of the interfacial layer becomes frozen in. This results in the negative pressure effects on cooling. We also demonstrate that differences in the sensitivity of various glass-forming liquids to the "confinement effects" can be rationalized by considering the relative importance of thermal energy and density contributions in controlling the α-relaxation dynamics (the E(v)/E(p) ratio).
authors.affiliation: Institute of Physics, University of Silesia, ulica Uniwersytecka 4, 40-007 Katowice, Poland.|NanoBioMedical Centre, Adam Mickiewicz University, ulica Umultowska 85, 61-614 Poznan, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Adrjanowicz
authors.affiliation: Institute of Physics, University of Silesia, ulica Uniwersytecka 4, 40-007 Katowice, Poland.|Silesian Center for Education and Interdisciplinary Research, ulica 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Kaminski
authors.affiliation: Institute of Physics, University of Silesia, ulica Uniwersytecka 4, 40-007 Katowice, Poland.|Silesian Center for Education and Interdisciplinary Research, ulica 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Koperwas
authors.affiliation: Institute of Physics, University of Silesia, ulica Uniwersytecka 4, 40-007 Katowice, Poland.|Silesian Center for Education and Interdisciplinary Research, ulica 75 Pulku Piechoty 1a, 41-500 Chorzow, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Paluch
mesh_terms: D008956:Models, Chemical; D058608:Nanopores; D011312:Pressure; D058989:Vitrification