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A metallic anti-biofouling surface with a hierarchical topography containing nanostructures on curved micro-riblets

查看全文 作　　者：Taekyung [1]Kim;Sunmok [1,2]Kwon;Jeehyeon [1,2]Lee;Joon Sang [1,2]Lee;Shinill [1,2]Kang 高影响力作者 机构地区：[1]National Center for Optically-assisted high precision Mechanical Systems,Yonsei University,Seoul 03722,Korea;[2]School of Mechanical Engineering,Yonsei University,50 Yonsei-ro,Seodaemun-gu,Seoul 03722,Korea高影响力机构 出　　处：《Microsystems & Nanoengineering》索引2022年第8卷第1期,共14页高影响力期刊 基　　金：This work was supported by the National Research Foundation of Korea(NRF)Grant funded by the Korean Government(MSIP)(No.2015R1A5A1037668). 摘　　要：Metallic surface finishes have been used in the anti-biofouling,but it is very difficult to produce surfaces with hierarchically ordered structures.In the present study,anti-biofouling metallic surfaces with nanostructures superimposed on curved micro-riblets were produced via top-down fabrication.According to the attachment theory,these surfaces feature few attachment points for organisms,the nanostructures prevent the attachment of bacteria and algal zoospores,while the micro-riblets prohibit the settlement of macrofoulers.Anodic oxidation was performed to induce superhydrophilicity.It forms a hydration layer on the surface,which physically blocks foulant adsorption along with the anti-biofouling topography.We characterized the surfaces via scanning electron and atomic force microscopy,contact-angle measurement,and wear-resistance testing.The contact angle of the hierarchical structures was less than 1°.Laboratory settlement assays verified that bacterial attachment was dramatically reduced by the nanostructures and/or the hydration layer,attributable to superhydrophilicity.The micro-riblets prohibited the settlement of macrofoulers.Over 77 days of static immersion in the sea during summer,the metallic surface showed significantly less biofouling compared to a surface painted with an anticorrosive coating. 关 键 词：Anti-biofouling Superhydrophilic Hierarchical topography Metallic engineered surface Nanoimprinting,static immersion test,field trials
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