Entry #25 - Fingers in the Submicron World

This is a TEM image of polyethylene glycol and ammonium sulfate solution at 72% relative humidity, captured using the flash freeze technique. This metho is useful for studying the morphonology of submicron particles at different humidity levels, as it allows the particles to equilibrate at the desired relative humidity and then be vitrified for cryo-TEM analysis. In this study, we are investigating the size-dependent morphology of the polyethylene glycol and ammonium sulfate system, which is relevant to understanding the composition and behavior of atmospheric aerosols.