ABSTRACT
Abstract-Superhydrophobic properties have been studied for silver nanoparticles covered copper surfaces. The silver nanoparticles have been obtained by reducing silver ions from silver nitrate solution onto copper substrates by means of a galvanic exchange reaction. The size of the nanoparticles has been controlled by varying the concentration of the solution. The contact angle and contact angle hysteresis have been studied on these samples after passivating with low surface energy stearic acid organic molecules. The obtained water contact angle is as high as 156◦ with a hysteresis as low as 4◦ for one minute coating using 24.75 mM solution. However, a strong dependence of contact angle and hysteresis on the silver ion concentration in the solution has been observed.
