How confined lubricants diffuse during shear

被引：31

作者：

Mukhopadhyay, A

Bae, SC

Zhao, J

Granick, S

机构：

[1] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[2] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[3] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.93.236105

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The translational diffusion of a fluorescent dye embedded at a dilute concentration in a confined fluid was compared at rest and during shear. The fluid, octamethylcyclotetrasiloxane (OMCTS), was confined between step-free muscovite mica to thickness 3-4 layers. Fluorescence correlation spectroscopy showed that the time scales of intensity-intensity autocorrelation functions were essentially the same during shear and at rest, except they were faster during shear by a factor of 2 to 5. This dynamical probe of how liquids order in molecularly thin films fails to support the hypothesis that shear produced a melting transition.

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页数：4

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