R.Yuvaraj, K. S. Sakthi Monish, R. Sanju Aravind, M. Sanjay, and B. Santhosh. “Modification of Copper Surface for Increasing Contact Angle of Water Droplet Using Physical Methods”. International Journal of Intellectual Advancements and Research in Engineering Computations, vol. 7, no. 2, June 2019, pp. 2697-08, https://ijiarec.com/ijiarec/article/view/1030.