Preparation and optimization of CBZ nanoparticles (NPs): (A) Effect of type of surfactant on particle size, PDI, and entrapment efficiency of CBZ NPs, (B) effect of 0.25% w/v didodecyltrimethylammonium bromide (DMAB) concentration on particle size, PDI, and entrapment efficiency of CBZ NPs, (C) effect of 0.5% w/v DMAB concentration on particle size, PDI, and entrapment efficiency of CBZ NPs, (D) effect of 1% w/v DMAB concentration on particle size, PDI, and entrapment efficiency of CBZ NPs, (E) effect of surfactant concentration and drug loading on zeta potential of CBZ NPs, (F) particle size distribution for optimized CBZ NPs. Data was represented with mean ± SD.