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    Bacterial Antifouling Characteristics of Helicene-Graphene Films

    Year: 2021

    Journal: Nanomaterials, Volume 11, JAN

    Authors: Liu, Shuhao; Bae, Michael; Hao, Li; Oh, Jun Kyun; White, Andrew R.; Min, Younjin; Cisneros-Zevallos, Luis; Akbulut, Mustafa

    Organizations: Food Manufacturing Technologies Program from the USDA National Institute of Food and Agriculture [A1363, 2019-68015-29231, TEX09762]; National Science Foundation (NSF) [1826250, 1511626]

    Keywords: bacterial antifouling; helicene; thin film; Langmuir-Schaefer; S; aureus

    Herein, we describe interfacially-assembled [7]helicene films that were deposited on graphene monolayer using the Langmuir-Schaefer deposition by utilizing the interactions of nonplanar (helicene) and planar (graphene) pi-pi interactions as functional antifouling coatings. Bacterial adhesion of Staphylococcus aureus on helicene-graphene films was noticeably lower than that on bare graphene, up to 96.8% reductions in bacterial adhesion. The promising bacterial antifouling characteristics of helicene films was attributed to the unique molecular geometry of helicene, i.e., nano-helix, which can hinder the nanoscale bacterial docking processes on a surface. We envision that helicene-graphene films may eventually be used as protective coatings against bacterial antifouling on the electronic components of clinical and biomedical devices.
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