Name: movieS1 Title: Drop trapping and release cycle Video legend: Adjustment of the counter flow mediates drop trapping for imaging of the drop content. A higher counter flow triggers drop release. The video shows one trapping and release cycle. Keywords: drops droplets emulsion trapping traps rapid imaging microfluidics protein ------- Name: movieS2 Title: Point-like vimentin aggregation over time Video legend: At a magnesium chloride concentration of 14.5 mM vimentin filaments undergoe strong aggregation to point-like networks. Keywords: drops droplets emulsion vimentin polyelectrolyte aggregation network microfluidics