Zero applied stress rheometer

被引：9

作者：

Bellon, L ^{[1
]}

Buisson, L ^{[1
]}

Ciliberto, S ^{[1
]}

Vittoz, F ^{[1
]}

机构：

[1] Ecole Normale Super Lyon, Phys Lab, CNRS, UMR 5672, F-69364 Lyon 07, France

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2002年 / 73卷 / 09期

关键词：

D O I：

10.1063/1.1499210

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In order to test the fluctuation-dissipation relation on rheological properties of soft materials, we built an experiment to measure thermally excited strain in a sample and compare it to the classical response to an external stress. The rheometer is based on a cylindrical Couette geometry. We use differential interferometry to achieve better than 10(-10) rad/rootHz sensitivity in angular position above 0.5 Hz. The forcing method, based on electrostatic interaction in a capacitor, generates torques comparable to that of thermal noise. Experiments on a calibrated silicon oil show good agreement between response and fluctuation measurements. (C) 2002 American Institute of Physics.

引用

页码：3286 / 3290

页数：5

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