Design and fabrication of highly hydrophobic Mn nano-sculptured thin films and evaluation of surface properties on hydrophobicity
محورهای موضوعی : Journal of Theoretical and Applied PhysicsSomaye Hosseini 1 , Hadi Savaloni 2 , Mehran Gholipour-Shahraki 3
1 - Plasma Physics Research Center, Science and Research Branch, Islamic Azad University
2 - Department of Physics, University of Tehran
3 - Physics Department, Faculty of Science, Arak University
کلید واژه: Sculptured thin films, Hydrophobicity, Surface free energy, Cassie–Baxter state, Wenzel state, Petal effect,
چکیده مقاله :
AbstractThe wettability of solid surfaces is important from the aspects of both science and technology. The Mn nano-sculptured thin films were designed and fabricated by oblique angle deposition of Mn on glass substrates at room temperature. The obtained structure was characterized by field emission scanning electron microscopy and atomic force microscopy. The wettability of thin films samples was investigated by water contact angle (WCA). The 4-pointed helical star-shaped structure exhibits hydrophobicity with static WCAs of more than 133° for a 10-mg distilled water droplet. This sample also shows the rose petal effect with the additional property of high adhesion. The Mn nano-sculptured thin films also act as a sticky surface which is confirmed by hysteresis of the contact angle obtained from advancing and receding contact angles measurements. Physicochemical property of liquid phase could effectively change the contact angle, and polar solvents in contact with hydrophobic solid surfaces do not necessarily show high contact angle value.
