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Fig. 1 | Nanoscale Research Letters

Fig. 1

From: Examining the Roles of Emulsion Droplet Size and Surfactant in the Interfacial Instability-Based Fabrication Process of Micellar Nanocrystals

Fig. 1

Visual observation of the emulsion droplets and the resulted QD-encapsulated micelles after organic solvent evaporation. a No PVA was used. Few to no emulsion droplets were formed (top image); few to no QD-encapsulated micelles were formed upon organic solvent removal (bottom image, the inset shows corresponding fluorescent image using a hand-held UV lamp to excite the red QD fluorescence). b Manual shaking was used to form emulsion droplets. ~25 μm emulsion droplets were formed (top image, the inset shows the droplet size measurement result from image analysis of 500 droplets). Additionally, the size variation due to different shaking times was found to be minimal (Fig. S1). Upon organic solvent removal a transparent and homogeneous dispersion was formed, indicating successful formation of nanocrystal-encapsulated micelles (bottom image, the inset shows corresponding fluorescent image using a hand-held UV lamp to excite the red QD fluorescence). c Bath sonication was used to form emulsion droplets. ~3 μm emulsion droplets were formed (top image, the inset shows the droplet size measurement result from image analysis of 500 droplets). Additionally, the size variation due to different shaking times found to be minimal (Fig. S1). Upon organic solvent removal, a transparent and homogenous dispersion was formed, indicating successful formation of nanocrystal-encapsulated micelles (bottom image, the inset shows corresponding fluorescent image using a hand-held UV lamp to excite the red QD fluorescence). To analyze the size of emulsion droplets of a particular sample, firstly, a light microscopy image of the emulsion droplets was taken, and subsequently, the diameters of ~500 droplets were measured by the free software ImageJ to obtain the average size and size distribution of the emulsion droplets of the sample

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