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Emulsion is the process of suspension of small globules of one liquid into other such that the fluids are immiscible with each other. Nanoemulsions are the group of dispersed nano-particles of oil in water having extremely minute size of 100-600 nm. The nanoemulsions are prepared using various emulsification techniques such as microfluidization, high-pressure homogenization and sonication (use of ultrasound energy). There are several advantages of nanoemulsions over the conventional emulsion systems. One of the major advantages is the extreme micro droplet size of nanoemulsions with much high surface area which makes them highly effective in transportation system or delivery systems used majorly in cosmetics. Moreover, nanoparticles do not cause the problems such as flocculation, coalescence or inherent creaming which are generally faced by microemulsions. This makes nanoemulsions ideal for variety of formulations such creams, sprays and foams. Considering the extreme small size of these particles, the nanoemulsions are increasingly finding application in pharmaceutical industry, cosmetic industry and also in food sector. The pharmaceutical applications of nanoemulsions majorly dominate the nanoemulsions market, followed by the cosmetic usages. Currently, the market for nanoemulsions is dominated by North America and Europe. Asia Pacific is the fastest growing market for nanoemulsions.
