Reversible UV-Light-Induced Ultrahydrophobic-to-Ultrahydrophilic Transition in an α-Fe2O3 Nanoflakes Film
Langmuir2008Vol. 24(19), pp. 10569–10571
Citations Over TimeTop 10% of 2008 papers
Abstract
We describe a simple and robust approach to fabricating an alpha-Fe2O3 switchable surface. The hydrophobicity of alpha-Fe2O3 nanostructures was observed for the first time. A remarkable surface wettability transition can be easily achieved by ultraviolet (UV) illumination. The distinctive properties of surface defects are disclosed by X-ray photoelectron spectroscopy (XPS) analysis. The nanoscale adsorption and photocatalytic properties of Fe2+ defects account for the highly amphiphilic character of the surfaces. We believe that the experiment will further the molecular-scale understanding and manipulation of the wetting behavior on smart devices.
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