Figure 9.

(A) Influence of LC droplet size on endotoxin-induced bipolar-to-radial ordering transitions in micrometer-sized droplets of nematic 5CB. The droplets were exposed to either an aqueous solution containing 100 pg/mL endotoxin (solid bar) or the same aqueous solution without endotoxin (open bar). No 5CB droplets were observed to exhibit a radial configuration in the absence of 100 pg/mL endotoxin above a diameter of 6 μm. (B) Confocal fluorescent micrograph showing localization of BODIPY-labeled endotoxin at the center of a 5CB droplet in the radial configuration. Reproduced with permission.^{14, 16}