Nanotexturation-induced extreme wettability of an elemental tellurium coating
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A combination of microscale and nanoscale texturation has been achieved in hierarchically structured Te coatings deposited onto a variety of substrata via self-catalyzed vapor transport. The coating thickness and roughness of the deposited Te surfaces are tunable via control over the reaction temperature and diffusion flux. The intricately structured surfaces exhibit sub-40 ms flash spreading of water to eventual macroscopic contact angles of 0° without any need for surface cleaning. The wettability characteristics of the surface are ascribed to the role of the hierarchical roughness in stabilizing the droplet/surface interactions in the Wenzel regime. The surfaces retain their hydrophilic properties over several months and are especially notable as a conductive addition to materials exhibiting unusual superwetting behaviour. © 2012 The Royal Society of Chemistry.
author list (cited authors)
Velázquez, J. M., Gaikwad, A. V., Rout, T. K., Baier, R. E., Furlani, E. S., & Banerjee, S.