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    High-Definition Polymeric Membranes: Construction of 3D Lithographed Channel Arrays through Control of Natural Building Blocks Dynamics

    Year: 2010

    Journal: ACS Appl. Mater. Interfaces, 2010, 2 (2), pp 459–466, 20111221

    Authors: Valentina Speranza, † Francesco Trotta, ‡ Enrico Drioli, §,? and Annarosa Gugliuzza* ,?

    Organizations: Research Institute on Membrane Technology, National Research Council (ITM-CNR), I-87030 Rende (CS), Italy, Department of Pharmaceutical Science, University of Calabria, I-87030 Rende, Italy, Department of Chemistry, IFM, University of Turin, I-10125 Turin, Italy, and Department of Chemical Engineering and Materials, University of Calabria, I-87030 Rende, Italy

    The fabrication of well-defined interfaces is in high demand in many fields of biotechnologies. Here, high-definition membrane-like arrays are developed through the self-assembly of water droplets, which work as natural building blocks for the construction of ordered channels. Solution viscosity together with the dynamics of the water droplets can decide the final formation of three-dimensional well-ordered patterns resembling anodic structures, especially because solvents denser than water are used. Particularly, the polymer solution viscosity is demonstrated to be a powerful tool for control of the mobility of submerged droplets during the microfabrication process. The polymeric patterns are structured at very high levels of organization and exhibit well-established transport−surface property relationships, considered basics for any types of advanced biotechnologies.