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journalArticle ACS Applied Bio Materials ACS Appl. Bio Mater. DOI 10.1021/acsabm.0c00714 Tian Ze Lei Zhenglong Chen Yanbin Chen Chuan Zhang Ruochen Chen Xi Bi Jiang Sun Haoran Inhibition Effectiveness of Laser-cleaned Nanostructured Aluminum Alloys to Sulfate-reducing Bacteria Based on Super-wetting and Ultra-slippery Surfaces This paper is a continued study on laser cleaning removal of marine micro-biofoulings from Al alloy surfaces. According to our previous study, it is noted that the antifouling functions of the generated laser-cleaned metallic surfaces must be highlighted. In this work, the inhibition effectiveness of the laser-cleaned Al alloy surfaces was evaluated using a type of vital marine microorganism sulfate-reducing bacteria (SRB) Desulfovibrio desulfuricans subsp. desulfuricans in a dynamic bacterial solution. Before immersion tests, the laser-cleaned surfaces with nanostructures were chemically processed into superhydrophilic, superhydrophobic, and ultra-slippery surfaces. SRB attachment behaviors as well as inhibition mechanisms of the three surfaces to the SRB settlement were characterized and revealed. The SRB adhering to the above surfaces presented three different morphologies, i.e., broken, dented, and plump cells. Superhydrophilic surfaces unexpectedly showed a not inferior anti-bacterial ability. A piercing effect of nanostructures caused non-toxic mechanical damage of cell membranes. Anti-adhesion property of superhydrophobic solid-air hybrid surfaces was unreliable due to the loss of air-bubble. Morphology of the last surviving SRB cells left on the ultra-slippery surfaces was basically plump. Stable repellent function of the surfaces was responsible for the vigorous prevention of the adhesion of the SRB. Research results offer an instruction to the anti-bacterial/anti-adhesion property of the laser-cleaned surfaces, and a practical value for periodic service of marine high-end equipment. 2020-08-20 https://doi.org/10.1021/acsabm.0c00714 2020-08-26 11:46:52 ACS Publications Publisher: American Chemical Society