Nanostructured Superhydrophobic Silver Surfaces

Dilip K. Sarkar

doi:10.4028/www.scientific.net/MSF.706-709.1630

Paper Titles

Internal Stresses in Nanocrystalline Nickel and Nickel-Iron Alloys
p.1607

Crystallographic Features of the C-Type Orbital-Ordered, and Charge- and Orbital-Ordered States in the Simple Perovskite Manganite Ca_1-xLa_xMnO₃
p.1612

Electrodeposited Nanocrystalline Ni-Fe with Banded Structure
p.1618

Obtaining Ultrafine and Nanocrystalline Structure by Hot and Warm Deformation in Microalloyed Steel X90
p.1624

Nanostructured Superhydrophobic Silver Surfaces
p.1630

Synthesis and Fabrication of Aligned Conjugated Polymer Thin Films
p.1636

Characterization of Magnetic Properties of Nanocrystalline Ni and Ni-15%Fe Alloy
p.1642

X-Ray Measurement of Residual Stress Distribution in Sputtered Cu Thin Films
p.1649

EDXRD Setup for Real Time Observation of a Gas Tungsten Arc (GTA) Welding Process
p.1655

HomeMaterials Science ForumMaterials Science Forum Vols. 706-709Nanostructured Superhydrophobic Silver Surfaces

Nanostructured Superhydrophobic Silver Surfaces

Abstract:

Inspired by “lotus-effect”, a superhydrophobic surface, in general, is prepared via two steps: (i) creating a surface roughness and then (ii) lowering the surface energy via a self-assembly of organic molecules or via low surface energy coatings. Superhydrophobicity cannot result if one of these two essential factors does not coexist. In the present work, it has been shown that superhydrophobic properties can be achieved on silver surfaces both via two-steps and a novel and simple one-step process. In the two step-processes a fractal-structured silver film deposited on copper surface by galvanic exchange reactions was passivated using stearic acid organic molecules to reduce the surface energy resulting in the superhydrophobicity. In the one-step process, however, the copper substrates were simply immersed in the silver nitrate solution containing fluoroalkylsilane (FAS-17) molecules resulting in superhydrophobicity. The silver films prepared both via two-steps and one-step processes were found to be highly water repellant with the water drops rolling off those surfaces. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) were utilized to understand the morphology, molecular bonding, and chemical properties of the superhydrophobic silver surfaces.