The measurement of surface forces and shape changes during the coalescence of fluid interfaces was discussed. A surface forces apparatus (SFA Mark III) was used to measure the forces between and the changing shapes of two surfaces. It was observed that large normal and lateral deformations were consistent with a simple theoretical analysis of the long-range effects of short-range attractive van der Walls forces. The results suggested that two fluidlike structures such as liquid droplets and soft biological cells can sense each other at much larger separation.
ASJC Scopus subject areas
- Physics and Astronomy (all)