Fig. 4. (a) Digital photograph of n-dodecane-in-50.5% aqueous sucrose-in-n-dodecane Pickering double emulsion with the corresponding transmittance data. (b) Fluorescence micrograph obtained for such an emulsion prepared with Nile Red dissolved in both the internal and external n-dodecane phases. (c) Optical micrograph obtained for the same emulsion prepared in the absence of any sucrose, i.e. with pure water, in order to provide contrast.