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Probing the confined dynamics of a spherical colloid close to a surface by combined optical trapping and reflection interference contrast microscopy

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4 Author(s)
Nadal, Francois ; Centre de recherche Paul-Pascal, Avenue Schweitzer, 33600 Pessac, France ; Dazzi, Alexandre ; Argoul, Francoise ; Pouligny, Bernard

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.1423790 

A reflection interference contrast microscope and a two-beam optical trap have been combined to measure the interaction force between a colloidal particle (latex) and a solid wall (quartz plate). The particle-wall separation is measured with a nanometric resolution. The technique reveals the film drainage effect when the particle gets close to the wall and allows deducing the particle-wall equilibrium force profile, in the 0.1 to 10 pN range. © 2001 American Institute of Physics.

Published in:
Applied Physics Letters  (Volume:79 ,  Issue: 23 )

Date of Publication: Dec 2001

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