A Modular Flow Cell System for Studying Biomimetic and BioinspiredAnti-Adhesive and Antimicrobial Surfaces

ABSTRACTBiofouling causes serious problems in many kinds of technical equipment. Consequently, there is great interest in developing surfaces with anti-adhesive and antimicrobial properties. Many such surfaces exist in nature, and artificial systems that mimic or are inspired by these natural systems could potentially be valuable technical surfaces. Recent studies on the interactions of bacteria with cicada wings revealed that rather than the wings being effective at repelling bacteria, after attachment the wing surface disrupts bacterial cell walls. Inspired by these structures, SmartMembranes GmbH used electrochemical precision etching to produce porous anodized aluminum oxide (AAO) membranes with structurally well-defined surface nanopatterns having pore diameters of 200–300 nm. We investigated the surfaces of these AAO membranes to assess their potential to prevent biofouling, using Escherichia coli as a model microbe. Bacterial adhesion tests were conducted using a modular flow cell system that is de...