Glass Transition in Liquids: Two versus Three-Dimensional Confinement

by: G Barut, P Pissis, R Pelster, G Nimtz

Physical Review Letters, Vol. 80, No. 16. (20 April 1998), pp. 3543-3546.

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摘要

The molecular dynamics of glass-forming liquids is strongly affected by nm-scale confinements. Our dielectric data provide strong evidence both for the “cooperativity” concept and for the existence of two states (interfacial layer and volume liquid). With decreasing size of confinement the orientational relaxation associated with the glass transition becomes faster; and the glass transition temperature is lowered. These effects are stronger for 3D confined droplets than for 2D confined pores. However; the radius at which size effects cease; i.e.; the cooperativity length; does not depend on the dimensionality of the confinement.

@article{barut98, abstract = {The molecular dynamics of glass-forming liquids is strongly affected by nm-scale confinements. Our dielectric data provide strong evidence both for the “cooperativity” concept and for the existence of two states (interfacial layer and volume liquid). With decreasing size of confinement the orientational relaxation associated with the glass transition becomes faster; and the glass transition temperature is lowered. These effects are stronger for 3D confined droplets than for 2D confined pores. However; the radius at which size effects cease; i.e.; the cooperativity length; does not depend on the dimensionality of the confinement.}, author = {Barut, G. and Pissis, P. and Pelster, R. and Nimtz, G. }, citeulike-article-id = {1689645}, doi = {http://dx.doi.org/10.1103/PhysRevLett.80.3543}, journal = {Physical Review Letters}, keywords = {confinement, experiment, length-scale}, month = {April}, number = {16}, pages = {3543--3546}, posted-at = {2007-10-29 20:49:18}, priority = {0}, publisher = {American Physical Society}, title = {Glass Transition in Liquids: Two versus Three-Dimensional Confinement}, url = {http://dx.doi.org/10.1103/PhysRevLett.80.3543}, volume = {80}, year = {1998} }

RIS record

TY - JOUR ID - barut98 L3 - citeulike-article-id:1689645 N2 - The molecular dynamics of glass-forming liquids is strongly affected by nm-scale confinements. Our dielectric data provide strong evidence both for the “cooperativity” concept and for the existence of two states (interfacial layer and volume liquid). With decreasing size of confinement the orientational relaxation associated with the glass transition becomes faster; and the glass transition temperature is lowered. These effects are stronger for 3D confined droplets than for 2D confined pores. However; the radius at which size effects cease; i.e.; the cooperativity length; does not depend on the dimensionality of the confinement. IS - 16 JF - Physical Review Letters EP - 3546 TI - Glass Transition in Liquids: Two versus Three-Dimensional Confinement PB - American Physical Society VL - 80 SP - 3543 KW - confinement KW - experiment KW - length-scale AU - Barut, G AU - Pissis, P AU - Pelster, R AU - Nimtz, G PY - 1998/04/20/ UR - http://dx.doi.org/10.1103/PhysRevLett.80.3543 ER -

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