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Influence of noise on force measurements

Journal article
Authors Giovanni Volpe
Laurent Helden
Thomas Brettschneider
Jan Wehr
Clemens Bechinger
Published in Physical Review Letters
Volume 104
ISSN 00319007
Publication year 2010
Published at
Language en
Subject categories Physical Sciences

Abstract

We demonstrate how the ineluctable presence of thermal noise alters the measurement of forces acting on microscopic and nanoscopic objects. We quantify this effect exemplarily for a Brownian particle near a wall subjected to gravitational and electrostatic forces. Our results demonstrate that the force-measurement process is prone to artifacts if the noise is not correctly taken into account. © 2010 The American Physical Society.

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