Bio-inspired antimicrobial surfaces fabricated by glancing angle deposition.

Autor: Qu C; Department of Electrical and Computer Engineering, University of Louisville, 2210 S Brook St, Louisville, KY, 40292, USA. chuang.qu@louisville.edu., Rozsa JL; Department of Biology, University of Louisville, 139 Life Sciences Bldg., Louisville, KY, 40292, USA., Jung HJ; Department of Biology, University of Louisville, 139 Life Sciences Bldg., Louisville, KY, 40292, USA., Williams AR; Department of Biology, University of Louisville, 139 Life Sciences Bldg., Louisville, KY, 40292, USA., Markin EK; Department of Biology, University of Louisville, 139 Life Sciences Bldg., Louisville, KY, 40292, USA., Running MP; Department of Biology, University of Louisville, 139 Life Sciences Bldg., Louisville, KY, 40292, USA., McNamara S; Department of Electrical and Computer Engineering, University of Louisville, 2210 S Brook St, Louisville, KY, 40292, USA., Walsh KM; Department of Electrical and Computer Engineering, University of Louisville, 2210 S Brook St, Louisville, KY, 40292, USA.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Jan 05; Vol. 13 (1), pp. 207. Date of Electronic Publication: 2023 Jan 05.
DOI: 10.1038/s41598-022-27225-4
Abstrakt: This paper describes the fabrication of cicada-wing-inspired antimicrobial surfaces using Glancing Angle Deposition (GLAD). From the study of an annual cicada (Neotibicen Canicularis, also known as dog-day cicada) in North America, it is found that the cicada wing surfaces are composed of unique three-dimensional (3D) nanofeature arrays, which grant them extraordinary properties including antimicrobial (antifouling) and antireflective. However, the morphology of these 3D nanostructures imposes challenges in artificially synthesizing the structures by utilizing and scaling up the template area from nature. From the perspective of circumventing the difficulties of creating 3D nanofeature arrays with top-down nanofabrication techniques, this paper introduces a nanofabrication process that combines bottom-up steps: self-assembled nanospheres are used as the bases of the features, while sub-100 nm pillars are grown on top of the bases by GLAD. Scanning electron micrographs show the resemblance of the synthesized cicada wing mimicry samples to the actual cicada wings, both quantitatively and qualitatively. The synthetic mimicry samples are hydrophobic with a water contact angle of 125˚. Finally, the antimicrobial properties of the mimicries are validated by showing flat growth curves of Escherichia coli (E. coli) and by direct observation under scanning electron microscopy (SEM). The process is potentially suitable for large-area antimicrobial applications in food and biomedical industries.
(© 2023. The Author(s).)
Databáze: MEDLINE
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