A new capacitive sensor for displacement measurement in a surface-force apparatus

被引：50

作者：

Restagno, F

Crassous, J

Charlaix, E

Monchanin, M

机构：

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

[2] Univ Lyon 1, Dept Phys Mat, UMR 5586, F-69622 Villeurbanne, France

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2001年 / 12卷 / 01期

关键词：

surface forces apparatus; capacitive sensor; nanorheology;

D O I：

10.1088/0957-0233/12/1/302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a new capacitive sensor for displacement measurement in a surface-force apparatus which allows dynamical measurements in the range 0-100 Hz. This sensor measures the relative displacement between two macroscopic opaque surfaces over periods of time ranging from milliseconds to, in principle, an indefinite period, at a very low price and down to atomic resolution. It consists of a plane capacitor, a high frequency oscillator and a high sensitivity frequency-to-voltage converter. We use this sensor to study the nanorheological properties of dodecane confined between glass surfaces.

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收藏

页码：16 / 22

页数：7

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