Morphology study of the nanoparticles was carried out using scanning electron microscopy (SEM) (4). The formulation was lyophilised and further dried using vacuum oven for 30 min and the powder was uniformly spread on the coverslip and further coated with platinum using 208HR High-Resolution Sputter Coater (Ted Pella, INC, CA, USA). Coated sample was then inserted into the specimen chamber and scanned using TM 3030 Plus scanning electron microscope (Hitachi, Tokyo, Japan), at 5 kV.