![]() Research output: Contribution to journal Article peer-review. The greater decrease in bacterial adhesion to hydrophobic nanopillared surfaces than to hydrophilic or nanoporous ones is attributed to effective air entrapment in the three-dimensional pillar morphology, rendering them superhydrophobic and slippery, in addition to providing a minimized contact area for bacteria to adhere to.Īdhesion aluminum anodizing bacteria nanostructures superhydrophobic. Junghoon Lee, Youhua Jiang, Ferdi Hizal, Ga Hee Ban, Soojin Jun, Chang Hwan Choi Corresponding author for this work. Scanning electron microscopy revealed a few bacteria found on the hydrophobic nanopillared surfaces adhered predominantly to defective or damaged areas, whereas the intact area preserving the original nanopillared morphology was virtually devoid of adhering bacteria. Lee, Junghoon Jiang, Youhua Hizal, Ferdi Ban, Ga-Hee et al. coli on nanopillared surfaces, respectively. omniphobicity of oil-impregnated anodic aluminum oxide nanostructured surfaces 2019. ![]() ![]() Reductions in the numbers of adhering CFUs were more marked on hydrophobic surfaces under flow, amounting to more than 99.9% and 99.4% for S. For the hydrophilic surfaces, this was attributed to a decreased contact area, reducing bacterial adhesion forces on nanoporous and nanopillared surfaces to 4 and 2 nN, respectively, from 8 nN on flat surfaces. Compared to a nonstructured electropolished flat surface, the nanostructured surfaces significantly reduced the number of adhering colony forming units (CFUs) for both species, as measured using agar plating. Adhesion of Staphylococcus aureus ATCC 12600 (Gram-positive, spherically shaped) and Escherichia coli K-12 (Gram-negative, rod-shaped) was evaluated to the nanoengineered surfaces under both static and flow conditions (fluid shear rate of 37 s -1). ![]() Here, nanoporous and nanopillared aluminum surfaces were engineered by anodizing and postetching processes and made hydrophilic (using the inherent oxide layer) or hydrophobic (applying a Teflon coating) with the aim of discouraging bacterial adhesion. Bacterial adhesion and biofilm formation on surfaces are troublesome in many industrial processes. ![]()
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