4 research outputs found
Elastic Properties of Nanoparticle Monolayer Foams
Monolayers of nanosized carboxylate-functionalized polystyrene
particles at the air/water interface assemble into two coexisting
liquid phases of different densities. The rheological properties of
the individual phases and of the resulting nanoparticle texture is
measured using a magnetic needle microrheometer. We show that, despite
the liquid behavior of the individual viscous phases, the entire structure
exhibits elastic response to local deformations induced by the needle.
We explain this response by microscopically nonresolved nanofacets
that connect the domains and form a two-dimensional foam