| 
      
        | Formula no | Drug concentration (%) | Average Particle Size
          (nm) | Zeta Potential
          (mV) | Encapsulating Efficiency (%)* |  
        | F3 | 0.2 | 92.4 ±    20.3 | + 24.21 | 64.29 ± 0.12 |  
        | F12 | 0.4 | 70.3 ±    8.2 | + 26.73 | 62 ±    0.52 |  
        | F13 | 0.6 | 63.6 ±    6.6 | + 27.48 | 59.4 ±    0.25 |  
        | F14 | 0.8 | 45.4 ±    5.7 | + 28.44 | 54.1 ±    0.66 |  
        | F15 | 1 | 31.3 ±    5.4 | + 29.83 | ± 0.63 |  |