Fig. 2.
Optical microscopic images show the presence of LLPS at high relative humidity for supermicron SOM particles derived from α-pinene and limonene ozonolysis. Illustrations of the images are shown for clarity. Images for a α-pinene-derived SOM and b limonene-derived SOM were taken from previous experiments described in ref. 24 and ref. 28, respectively. Images are shown for an increasing RH. Small inclusions in a show the formation of a second liquid phase. The light gray circles at the center of the particles are an optical effect of the microscope and therefore are excluded from the illustrations