Skip to Main Content
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.