Fig. 4
From: Optical characterization of surface adlayers and their compositional demixing at the nanoscale
Nanoscale decomposition of a two-component mixture on the surface. a True-color SR-PAINT image of adlayers from a 1:3 mixture of TCE and chloroform, drawn on a spectral scale of 620–638 nm. Scale bar is 2 μm. b Zoom-in of the yellow-boxed area in a. Inset: intensity profile along the vertical (y) direction for the four closely located nanodroplets marked by the white box. Scale bar is 1 μm. c Averaged single-molecule spectra obtained for Regions I (large nanodroplets), II (the reddest small nanodroplets), and III (small nanodroplets with varying color) in b (solid lines), compared to that of adlayers of pure TCE and chloroform (dash lines). d Averaged spectral mean value (left y-axis) and corresponding chloroform percentage (right y-axis) of each droplet, as a function of droplet size. Shaded band represents the typical range of nanodroplets of pure TCE adlayers. e Recoloring of b by the estimated chloroform percentage of each nanodroplet. Scale bar is 2 μm
