For this study, different CNT solutions were prepared(containing CNTs in various weight ratios): (i) 1 wt%CNTs containing in 10 ml of toluene solution, (ii) 3 wt% CNTs in 10 ml of toluene solution, (iii) 5 wt%of CNTs in 10 ml of toluene solution, and (iv) 7 wt%CNTs in 10 ml of toluene solution and 10% of CNTs in 10 ml of toluene solution.