We present a new technique to measure the lateral diffusion of a surface active species at the fluid-fluid interface by merging a droplet monolayer onto a flat monolayer.
Jeong, D., Kim, K., Choi, M. C., Choi, S. Q. Fluorescence Recovery after Merging a Droplet to Measure the Two-dimensional Diffusion of a Phospholipid Monolayer. J. Vis. Exp. (104), e53376, doi:10.3791/53376 (2015).