Surface induced glass transition in a confined molecular liquid

Ranko Richert; Min Yang

doi:10.1021/jp022039r

Surface induced glass transition in a confined molecular liquid

Ranko Richert, Min Yang

Molecular Sciences, School of (SMS)

Research output: Contribution to journal › Letter › peer-review

38 Scopus citations

Abstract

The structural relaxation of a glass-forming simple liquid, 3-methylpentane, is studied by triplet state solvation dynamics as a function of the distance from the surface in porous silica. By bonding the optical probes to the pore surface, we observe interfacial dynamics which are 3 orders of magnitude slower compared with the bulk, equivalent to a surface induced glass transition. Consistent with length scales of cooperativity, these effects disappear for distances from the surface exceeding a few nanometers.

Original language	English (US)
Pages (from-to)	895-898
Number of pages	4
Journal	Journal of Physical Chemistry B
Volume	107
Issue number	4
DOIs	https://doi.org/10.1021/jp022039r
State	Published - Jan 30 2003

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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abstract = "The structural relaxation of a glass-forming simple liquid, 3-methylpentane, is studied by triplet state solvation dynamics as a function of the distance from the surface in porous silica. By bonding the optical probes to the pore surface, we observe interfacial dynamics which are 3 orders of magnitude slower compared with the bulk, equivalent to a surface induced glass transition. Consistent with length scales of cooperativity, these effects disappear for distances from the surface exceeding a few nanometers.",

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N2 - The structural relaxation of a glass-forming simple liquid, 3-methylpentane, is studied by triplet state solvation dynamics as a function of the distance from the surface in porous silica. By bonding the optical probes to the pore surface, we observe interfacial dynamics which are 3 orders of magnitude slower compared with the bulk, equivalent to a surface induced glass transition. Consistent with length scales of cooperativity, these effects disappear for distances from the surface exceeding a few nanometers.

AB - The structural relaxation of a glass-forming simple liquid, 3-methylpentane, is studied by triplet state solvation dynamics as a function of the distance from the surface in porous silica. By bonding the optical probes to the pore surface, we observe interfacial dynamics which are 3 orders of magnitude slower compared with the bulk, equivalent to a surface induced glass transition. Consistent with length scales of cooperativity, these effects disappear for distances from the surface exceeding a few nanometers.

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DO - 10.1021/jp022039r

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JF - Journal of Physical Chemistry B

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ER -

Surface induced glass transition in a confined molecular liquid

Abstract

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